Patent Description:
Historically, patellar fractures were treated non-operatively, which was thought to allow for adequate pain relief and partial restoration of extensor mechanism function. However, as surgical knowledge and technique has advanced, management of these injuries has evolved from non-operative care or patellectomy to anatomic reduction and internal fixation with a goal of osseous union.

Today, a non-operative treatment course can be recommended for non-displaced fractures of the patella, particularly when the fracture is non-displaced, the articular surface is not disrupted, and the extensor mechanism is intact. However, a disruption of the articular surface of as little as <NUM> or separation of bone fragments by as little as <NUM> is conventionally associated with an unacceptable risk of unsuitable bone healing. Additionally, patients with patella fractures often have concurrent retinacular tears that can result in fracture displacement and disruption of the extensor mechanism. Further, because of the important role of the patella in maintaining normal kinematics of the knee, operative management is considered to be the treatment of choice for patella fractures when patellar bone fragments are displaced, or the articular surface is disrupted.

One construct commonly used for the operative fixation of patella fractures is a tension band. In particular, an anterior tension band is applied by passing wires or braided cables or sutures behind previously implanted K-wires at the superior and inferior poles, crossing them, and twisting the ends to create a figure-eight pattern. Further, a wire or braided cable can be wrapped circumferentially around the patella directly on bone at a location anterior to the previously placed wires, and is tightened by twisting. A modification of this technique can be performed by replacing the K-wires with cannulated screws, such that a wire or braided cable or suture can be passed through the cannulated screws to create the anterior tension band with a figure-eight configuration, followed by application of a cerclage wire directly on the circumference of the patella.

While tension band constructs are the most common method of fixation, anterior knee pain, failure of the construct, and functional limitation with tension band fixation have all been reported. Further, this technique often fails to address inferior pole comminution commonly seen in fractures of the patella.

More recently, biomechanical studies have shown an advantage to fixation of patella fractures with plating constructs as opposed to tension band fixation. Patent document <CIT> discloses a device for patella fracture reduction. While various different patella plating constructs in use today can achieve satisfactory fracture reductions, the ultimate outcomes are often ineffective and clinically poor. In particular, despite reliable fracture healing and restoration of the extensor mechanisms, outcomes often remain unacceptable with convention techniques. A common misconception among surgeons is that patients recovering from patella fracture fixation mostly do well. However, this is likely because patients are not followed long enough post-operatively. Anterior knee pain after patellar fracture fixation is a common complaint during daily activity. Potential causes include patella baja, extensor mechanism malalignment, articular injury and posttraumatic arthritis, painful implants, or avascular necrosis. This anterior knee pain leads to limited rehabilitation and functional impairment.

Still another surgical option is to perform a partial or total patellectomy, though these procedures are typically reserved for extreme cases such as open injuries. Patellectomy procedures produce a high risk for creating patella baja, and bone-to-bone healing is preferred over tendon-to-bone healing. Also, a partial patellectomy procedure is likely to disrupt the main blood supply to the patella as it enters the inferior pole.

In other instances of an isolated inferior pole fracture that does not include the articular surface, fracture repairs are sometimes performed with what are commonly known as Krackow sutures. In particular, Krackow sutures are placed on the medial and lateral aspects of the patellar tendon, and retrograde drill holes are created from the interior pole to the superior apex of the patella. The sutures are then passed through the drill holes and tied over the superior bony edge of the patella.

In one aspect of the present disclosure, a patella bone plate includes a fixation body that, in turn, includes a fixation hub and a plurality of fixation nodes. The fixation hub can have an inner surface configured to face the patella bone and an outer surface opposite the inner surface. The fixation hub includes an array of fixation holes that extend from the inner surface to the outer surface. The fixation nodes can extend from the fixation hub and can each define a respective fixation hole. The bone plate can further include at least one leg that extends out from the body, the at least one leg being deformable and having a length sufficient so as to wrap around an inferior rim of the patella, the at least one leg including at least one fixation hole.

The following detailed description will be better understood when read in conjunction with the appended drawings, in which there is shown in the drawings example embodiments for the purposes of illustration. It should be understood, however, that the present disclosure is not limited to the precise arrangements and instrumentalities shown. In the drawings:.

Referring initially to <FIG>, bone plate <NUM> is configured for fixation to an underlying bone <NUM>. The underlying bone <NUM> can be defined by the patella bone <NUM>. In particular, the bone plate <NUM> can be configured to be fixed to a fractured patella bone so as to stabilize the fractured patella so as to promote healing. As will be appreciated from the description below, the bone plate <NUM> can be configured to stabilize a heavily comminuted fractures of the patella bone. The bone plate <NUM> can be a titanium bone plate, a stainless steel bone plate, or any alternative suitable biocompatible made as desired that possesses the requisite strength for patella fixation.

The bone plate <NUM> can define an inner surface <NUM> that is designed and configured to face the underlying bone <NUM>, and an outer surface <NUM> opposite the inner surface <NUM>. At least a portion of the inner surface <NUM> can further be configured to abut the underlying bone <NUM>. The bone plate <NUM> can include a fixation body <NUM> that includes a fixation hub <NUM> that is configured to secure to an anterior aspect of the patella <NUM>. The fixation body <NUM> can further include at least one fixation node <NUM> such as a plurality of fixation nodes <NUM> that are disposed radially outward with respect to the fixation hub <NUM>. The inner surface <NUM> at the fixation body <NUM> can be concave. Thus, the inner surface <NUM> at either or both of the fixation hub <NUM> and the fixation nodes <NUM> can be concave. In one example, the inner surface <NUM> at the fixation body <NUM> can be substantially dome shaped. The term "substantially" as used herein with respect to sizes and shapes can include any value within <NUM>% of the stated size and shape unless otherwise indicated. In some examples, the bone plate <NUM> can further include at least one fixation leg <NUM> that extends out from the fixation body <NUM>. As will be appreciated from the discussion below, the fixation legs <NUM> extend inferiorly from the fixation body <NUM> when the fixation hub is positioned on the anterior surface of the patella <NUM>. A first one of the fixation legs <NUM> can be configured to be secured to an inferior medial aspect of the patella <NUM>. A second one of the fixation legs <NUM> can be configured to be secured to an inferior lateral aspect of the patella <NUM>. A third one of the fixation legs <NUM> can be configured to be secured to an inferior pole of the patella <NUM>. Thus, the fixation legs <NUM> can include a middle leg and a pair of outer legs disposed on opposed sides of the middle leg.

The hub <NUM> can define a plurality of fixation holes <NUM> that extend from the outer surface <NUM> to the inner surface <NUM>. The fixation holes <NUM> are configured to receive a bone anchor <NUM> that threadedly purchases with the patella. In this regard, it should be appreciated that the bone anchor <NUM> can threadedly purchase with the patella bone or with fractured patellar bone fragments depending on the position of the respective fixation hole <NUM>. Further, the bone anchors <NUM> can have different lengths as desired. Thus, at least one of the bone anchors <NUM> can be sized to be driven into multiple bone fragments if desired.

A patella fixation system <NUM> can include the bone plate <NUM> and at least one bone anchor <NUM> that is configured to secure the bone plate <NUM> to the underlying bone. In one example, at least one of the fixation holes <NUM> up to all of the fixation holes <NUM> can be configured as a locking hole having at least one thread <NUM> that is configured to threadedly purchase with the bone anchor <NUM> when the bone anchor is driven into the fixation hole <NUM>.

In one example, the bone anchors <NUM> can include an anchor head <NUM> and a shaft <NUM> that extends from the anchor head <NUM> along a central anchor axis <NUM>. The shaft <NUM> can be threaded along a portion of its length up to an entirety of its length, for instance when the bone anchor <NUM> is provided as a screw. Thus, rotation of the bone anchor <NUM> in a first direction while the shaft <NUM> is purchased in the underlying bone can cause the shaft <NUM> to drive into the underlying bone <NUM>. Conversely, rotation of the bone anchor <NUM> in a second direction opposite the first direction while the shaft <NUM> is purchased in the underlying bone can cause the shaft <NUM> to be removed from the underlying bone <NUM>. In another example, the shaft <NUM> can be smooth along its length, for instance when the bone anchor <NUM> is configured as a nail, rivet, or pin. In one example, the anchor head <NUM> can be configured as a locking head whereby an external surface of the anchor head <NUM> is threaded. The anchor head <NUM> is configured to threadedly purchase with the bone plate <NUM> in the fixation hole <NUM>. The fixation hole <NUM> extends along a central hole axis <NUM> from the outer surface <NUM> to the inner surface <NUM>.

Referring now also to <FIG>, the fixation hole <NUM> can be configured as a variable angle fixation hole whereby the anchor head <NUM> is configured to threadedly purchase with the bone plate <NUM> in the fixation hole <NUM> when the central anchor axis <NUM> and the central hole axis <NUM> define any angle therebetween within a predetermined range of angles whereby the shaft <NUM> is driven into the underlying bone <NUM>. Accordingly, the angle defined by the central anchor axis <NUM> and the central hole axis <NUM> is adjustable within the range of angles, such that the central anchor axis <NUM> is angularly offset with respect to the central hole axis <NUM> at any angle as desired within the range of angles. In one example, the bone anchor <NUM> can be inserted into the fixation hole <NUM> such that the central anchor axis <NUM> is coaxial with the central hole axis <NUM> or at any angle relative to the central hole axis <NUM> within the range of angles. The range of angles can be between and include <NUM> degrees and <NUM> degrees. The outer surface of the anchor head <NUM> can be round or substantially spherical as illustrated in <FIG>, or substantially conically shaped or alternatively shaped as desired.

In accordance with the illustrated example, the fixation hole <NUM> can be defined by an interior surface <NUM> that extends from the outer surface <NUM> to the inner surface <NUM>. The fixation hole <NUM> can be configured as a variable-angle locking hole in one example. Thus, the interior surface <NUM> can include a plurality of scalloped portions <NUM>, which can be unthreaded, that extend into the interior surface and interrupt the at least one thread <NUM>. Accordingly, the scalloped portions <NUM> separate the at least one thread <NUM> into a corresponding plurality of columns <NUM> of thread segments <NUM> that are spaced from each other, such that ones of the scalloped portions <NUM> are disposed between adjacent ones of the columns <NUM> along a circumferential direction about the central hole axis <NUM>. In one example, the fixation hole <NUM> can include three scalloped portions <NUM>, four scalloped portions <NUM>, or any suitable alternative number of scalloped portions <NUM> as desired. Each of the scalloped portions <NUM>, the columns <NUM>, and the anchor head <NUM> can be shaped substantially as described in <CIT>.

The thread segments <NUM> can be defined by any number of threads <NUM> as desired. The threads <NUM> can be adapted and configured to engage external threads <NUM> of the anchor head <NUM> and can extend along paths which, if continued across the gaps defined by the scalloped portions <NUM>, would form a helical threading with a substantially constant pitch corresponding to the external threads <NUM> of the anchor head <NUM>. The anchor head <NUM> can have an externally spherical shape that allows the external threads <NUM> to threadedly purchase with the thread segments <NUM> whether the bone anchor <NUM> is inserted co-axially with the central hole axis <NUM> as shown in <FIG>, or angularly offset from the central hole axis <NUM> within the range of angles, as shown in <FIG>.

The columns <NUM> can have any suitable shape as desired. In accordance with one example, the fixation hole can have a complex shape including a first portion 47a that tapers radially inward toward the central hole axis <NUM> from the outer surface <NUM> toward the inner surface <NUM>, and a second portion 47b that tapers radially outward away from the central hole axis <NUM> from the first portion 47a to the inner surface <NUM> of the bone plate <NUM>. The first and second portions 47a and 47b can be unthreaded. The first portions 47a can be arranged along a first substantially conical shape centered on the central hole axis <NUM>, and the second portions 47b can be arranged along a second substantially conical shape centered on the central hole axis <NUM>. The scalloped portions <NUM> between the columns <NUM> can be, for example, substantially cylindrically shaped and extend radially outward beyond the first and second conical shapes, thereby extending the range of angulation of the bone anchor <NUM> when the bone anchor <NUM> is inserted into the fixation hole <NUM>, for instance when the shaft <NUM> extends into one of the scalloped portions <NUM>.

In accordance with the illustrated embodiment, the fixation hole <NUM> can include four columns <NUM> of thread segments <NUM> that are spaced about the circumference of the fixation hole <NUM>. For instance, columns <NUM> of thread segments <NUM> can be spaced substantially equidistantly from one another about the circumference of the fixation hole <NUM>. Thus, the scalloped portions <NUM> can define widths measured circumferentially about the central hole axis <NUM> that are substantially equal to one another. It should be appreciated, however, that the fixation hole <NUM> can include any number of columns <NUM> arranged in any number of patterns as desired. Furthermore, it should be appreciated that the columns <NUM> can alternatively be spaced about the circumference of the fixation hole <NUM> by varying distances, and the columns <NUM> and scalloped portions <NUM> can have different circumferential widths as well.

While one or more of the fixation holes <NUM> up to all of the fixation hole <NUM> can be configured as a variable angle locking hole in the manner described above, it should be appreciated that one or more of the fixation holes <NUM> up to all of the fixation holes <NUM> can be alternatively constructed as desired. For instance, at least one of the fixation holes <NUM> can be configured as a standard-type fixed angle locking hole. In particular, the bone plate <NUM> is configured to threadedly mate with the anchor head <NUM> in the fixation hole <NUM> only when the bone anchor <NUM> is oriented at a predetermined orientation with respect to the central hole axis <NUM>. In this example, the thread <NUM> can extend continuously along its respective helical path along multiple revolutions about the central hole axis <NUM> so as to purchase with the anchor head <NUM>. The predetermined orientation can be a nominal orientation whereby the central anchor axis <NUM> is coincident with the central hole axis <NUM>. Alternatively, the predetermined orientation can be defined when the central anchor axis <NUM> is oriented oblique to the central hole axis <NUM>. In certain examples, the anchor head <NUM> can be configured to threadedly mate with the bone plate <NUM> in the fixation hole <NUM> only when the bone anchor <NUM> is oriented at the predetermined orientation.

Alternatively or additionally still, at least one of the fixation holes <NUM> up to all of the fixation holes <NUM> can be configured as an unthreaded compression hole. Thus, one or more of the bone anchors <NUM> can be configured as a compression anchor whose anchor head <NUM> defines a compression head that is configured to bear against the bone plate <NUM> in the compression hole so as to apply a compressive force against the bone plate <NUM> toward or against the underlying bone. The interior surface <NUM> can extend between the outer surface <NUM> and the inner surface <NUM> so as to at least partially define the fixation hole <NUM>. During operation, the shaft <NUM> of the bone anchor <NUM> can be inserted through the fixation hole <NUM> and driven into the underlying bone <NUM>. When at least a portion of the shaft <NUM> is threaded, rotation of the bone anchor <NUM> causes the anchor head <NUM> to compress against the interior surface <NUM>. As a result, the anchor head <NUM> causes the bone plate <NUM> to apply a compressive force against the underlying bone <NUM>. The external surface of the anchor head <NUM> can be unthreaded. Similarly, at least a portion up to an entirety of the interior surface <NUM> that abuts the unthreaded external surface of the anchor head <NUM> can be unthreaded.

Alternatively or additionally still, at least one other ones of the fixation holes <NUM> can be a combination hole, whereby a threaded locking hole portion and an unthreaded compression hole portion intersect each other to define the combination hole. The bone anchor <NUM> can be selectively driven into the threaded locking hole portion and the unthreaded compression hole portion. The threaded locking hole portion can define a variable angle locking hole portion or a standard type locking hole portion as desired.

Referring now to <FIG>, and as described above, the fixation body <NUM> of the bone plate <NUM> can include the fixation hub <NUM> and the at least one fixation node <NUM> that is disposed radially out with respect to the fixation hub <NUM>. The bone plate <NUM> can be preformed such that the inner surface <NUM> at the fixation body <NUM> can define a concavity. Thus, the outer surface <NUM> at the fixation body <NUM> can be convex. In one example, the inner surface at the fixation body <NUM> can be substantially dome shaped. Thus, the bone plate <NUM> as-manufactured can generally conform to the patella bone <NUM>. In one example, the dome shape of the inner surface <NUM> at the fixation body <NUM> can be defined by any suitable radius as desired. For instance, the radius can in a range from approximately <NUM> to approximately <NUM>. In one example, the range can be from approximately <NUM> to approximately <NUM>. In particular, the radius can be approximately <NUM>. It should be appreciated that the concavity of the inner surface <NUM> can define any suitable geometry as desired other than a dome. During operation, the inner surface <NUM> is more preformed to the outer surface of the patella <NUM> (see <FIG>) than conventional flat bone plates. It is envisioned that in some circumstances the fixation body <NUM> may be manipulated in situ to better confirm to the patella <NUM>. In this regard, it should be appreciated that the fixation body <NUM> can be flexible and deformable so as to conform the fixation plate <NUM> to the underlying bone <NUM>.

Referring now to <FIG>, the fixation hub <NUM> is configured to be secured to one or more bone fragments of the patella <NUM> as desired. The fixation hub <NUM> can define a geometric center <NUM> that defines a central hub axis <NUM>. The fixation hub <NUM> can define a fixation hole <NUM> at the geometric center <NUM>. The central hole axis <NUM> of the fixation hole <NUM> at the geometric center <NUM> can be coincident with the central hub axis <NUM>. Thus, reference to the central hole axis <NUM> of the fixation hole at the geometric center <NUM> can apply more generally to the central hub axis <NUM> whether or not the geometric center defines a fixation hole <NUM>.

The fixation hub <NUM> can further include an array <NUM> of fixation holes <NUM>. The array <NUM> can be a circumferential array. The fixation holes <NUM> of the array <NUM> can be arranged along a path that extends about the geometric center <NUM>. For instance, the path can be a closed path that surrounds the geometric center <NUM>. In one example, the path of the array <NUM> can define a circle. The central hub axis <NUM> can define the center of the circle. The central hole axes <NUM> (see <FIG>) can lie on the circle. In one example, the fixation holes <NUM> can be spaced equidistantly from each other along the circle. Alternatively, the fixation holes <NUM> can be spaced at variable distances from each other. Further, while the fixation holes <NUM> of the array <NUM> can be arranged on the circular path, it should be appreciated that the fixation holes <NUM> of the array <NUM> can be alternatively arranged as desired. For instance, the fixation holes <NUM> of the array <NUM> can lie on any curved path. The curved path can define an ellipse in one example. Alternatively, the path can define a polygon. For instance, the central hole axes <NUM> can define the vertices, respectively, of the polygon. In one example, as illustrated in <FIG>, the polygon can be a regular polygon. Alternatively, the polygon can be an irregular polygon. In this regard, it should be appreciated that the fixation body <NUM> can be symmetrical or asymmetrical as desired.

In one example, the array <NUM> can include six fixation holes <NUM>. Thus, the regular polygon can be configured as a hexagon. It should be appreciated, however, that the array <NUM> can include any number of fixation holes <NUM> as desired. In one example, the fixation hole <NUM> at the geometric center <NUM> and the fixation holes <NUM> of the array <NUM> can constitute all fixation holes <NUM> of the fixation hub <NUM>. Alternatively, the fixation hub <NUM> can include at least one additional fixation hole <NUM> in addition to the fixation hole <NUM> at the geometric center <NUM> and the fixation holes <NUM> of the array <NUM>. The at least one additional fixation hole <NUM> can be disposed between the geometric center <NUM> and the array <NUM>. Alternatively or additionally, the at least one additional fixation hole <NUM> can be disposed radially outward of the array <NUM>. Thus, the array <NUM> can be disposed between the at least one additional fixation hole <NUM> and the geometric center <NUM>.

The fixation body <NUM> can include at least one aperture <NUM> that extends through the fixation hub <NUM> from the outer surface <NUM> to the inner surface <NUM>. For instance, the fixation body <NUM> can include a plurality of apertures <NUM> that extend through the fixation hub <NUM> from the outer surface <NUM> to the inner surface <NUM>. The fixation body <NUM> can include any number of apertures <NUM> as desired. Further, the apertures <NUM> can be of any suitable size and shape as desired. Further still, the apertures <NUM> can be positioned at any location as desired. In one example, the apertures <NUM> can be elongate. For instance, the apertures <NUM> can be elongate along a respective central axis <NUM>. The central axes <NUM> of the apertures <NUM> can define tangents along a respective common circle that surrounds the geometric center <NUM> of the fixation hub <NUM>. Further, the geometric center of the apertures <NUM> can lie on the respective circle. Thus, the geometric centers of the apertures <NUM> can be circumferentially aligned with each other. For instance the geometric center <NUM> of the fixation hub <NUM> can define the center of the respective circle. Thus, the respective circle of the apertures <NUM> can be concentric with the circle defined by the path of the array <NUM> of fixation holes <NUM>. The respective circle of the apertures <NUM> can define an inner circle of the fixation hub <NUM>. The circle of the array <NUM> of fixation holes <NUM> can define an outer circle of the fixation hub <NUM> that surrounds the inner circle of the fixation hub <NUM>.

The geometric centers of the apertures <NUM> can be radially aligned with each of the fixation hole <NUM> at the geometric center <NUM> and an aligned one 32a of the fixation holes <NUM> of the array <NUM>, with respect to a top plan view of the bone plate. For instance, the geometric centers of the apertures <NUM> can lie on a respective straight line <NUM> that extends from the central hole axis <NUM> of the fixation hole <NUM> at the geometric center <NUM> of the hub <NUM> to the central hole axis <NUM> of respective aligned ones of the fixation holes <NUM> of the array <NUM>. The geometric centers of the apertures <NUM> can lie on the respective central axes <NUM>. Thus, the respective straight line <NUM> can be said to intersect the central axis <NUM> of the apertures. The apertures <NUM> can be partially defined by respective inner sides that can partially define the fixation hole <NUM> at the geometric center <NUM>. The apertures <NUM> can be partially defined by respective outer sides that can partially define the respective aligned ones of the fixation holes <NUM> of the array <NUM>. The apertures <NUM> can define respective ends that each lie on respective straight lines <NUM> that extend from the central hub axis <NUM> to a location circumferentially between adjacent ones of the fixation holes <NUM> of the array <NUM>, with respect to one or both of a top plan view and bottom plan view of the bone plate <NUM>. One of the adjacent ones of the fixation holes <NUM> can be defined by the respective aligned one 32a of the fixation holes <NUM>. The central hole axis <NUM> of the other 32b of the adjacent ones of the fixation holes <NUM> can lie on the respective straight line <NUM> that extends to the central hole axis <NUM> of the fixation hole <NUM> at the geometric center <NUM> of the hub <NUM> without passing through any of the apertures <NUM>.

As described above, the apertures <NUM> can be elongate along the respective central axis <NUM>. For instance, the apertures <NUM> can be dog bone shaped in one example. However, the apertures <NUM> can define any suitable alternative shape as desired. For instance, the apertures <NUM> can be oval shaped or rectangular. Alternatively, the apertures <NUM> can be constructed as a circle, a regular polygon, or an irregular polygon. Further, the apertures <NUM> can be circumferentially equidistantly spaced from each other. Alternatively, the apertures <NUM> can be variably spaced from each other. Further still, the apertures <NUM> can be constructed such that their respective geometric centers are not in circumferential alignment with each other.

The apertures <NUM> can be sized greater than the fixation holes <NUM>. For instance, the apertures <NUM> can be sufficiently sized so as to define visualization windows that allow for visibility of the underlying patella. For instance, the user can visualize the patella through the visualization windows both as the bone plate <NUM> is being placed onto the patella, and after the bone plate <NUM> has been placed onto the patella. Thus, the surgeon can visually align the fixation holes <NUM> with respective bone fragments to which the bone plate <NUM> is to be secured. The apertures <NUM> can further assist in the malleability of the bone plate <NUM>, which allows the bone plate <NUM> to be bent as desired so as to better conform to the patella. Further, the apertures <NUM> can define herniation holes that allow for soft tissue to herniate through the apertures <NUM>. For instance, when the bone plate <NUM> is placed against the patella and secured to the patella, soft tissue residing between the patella bone and the bone plate <NUM> can herniate through the apertures <NUM>, thereby reducing the profile of the bone plate <NUM> with respect to the epidermis.

With continuing reference to <FIG>, and as described above, the fixation body <NUM> can include a plurality of fixation nodes <NUM> that are disposed radially outward with respect to the fixation hub <NUM>. The fixation nodes <NUM> can be supported by the fixation hub <NUM>. Each of the fixation nodes <NUM> can define at least one fixation hole <NUM>. Thus, the fixation nodes <NUM> can be configured to secure to one or more bone fragments of the patella <NUM> as desired. For instance, each of the fixation nodes <NUM> can define a single fixation hole <NUM>. In one example, each of the fixation nodes <NUM> can define an eyelet <NUM> that, in turn, defines the fixation hole <NUM>. The eyelet <NUM> can define an annular wall having an inner surface that defines the interior surface <NUM> of the respective fixation hole <NUM>. The eyelet <NUM> can further define an outer surface <NUM> opposite the inner surface that defines an exterior surface <NUM> of the fixation node <NUM>.

The bone plate <NUM>, and in particular the body <NUM> of the bone plate <NUM>, defines a plurality of arms <NUM>, that extends radially outward from the fixation hub <NUM> to a respective at least one of the fixation nodes <NUM>. Thus, each of the fixation nodes <NUM> can be attached to the fixation hub <NUM> by the respective arms <NUM>. For instance, the at least one arm <NUM> can extend to the outer surface <NUM> of the eyelet <NUM>. In one example, the at least one arm <NUM> can include at least one pair of arms <NUM> that includes first and second arms 58a and 58b. Thus, each of the fixation nodes <NUM> can be secured to the fixation hub <NUM> by a respective pair of arms <NUM>. Each pair of arms <NUM> can be defined by a first arm 58a and a second arm 58b. The arms 58a and 58b of each pair can converge toward each other as they extend from the fixation hub <NUM> to the respective one of the fixation nodes <NUM>. Each of the arms <NUM> can be devoid of fixation holes that are designed and configured to receive a fixation screw so as to attach the bone plate <NUM> to the underlying bone <NUM>. Further, each of the arms <NUM> can extend from the fixation hub <NUM> to the respective one of the nodes <NUM> along an arm axis that intersects the central hole axis <NUM> of a respective aligned one of the fixation holes <NUM> of the array <NUM>. The respective aligned one of the fixation holes <NUM> of the first arm 58a can be adjacent to the respective aligned one of the fixation holes <NUM> of the second arm 58b along the array <NUM>.

Referring to <FIG>, the inner surface <NUM> at the arms <NUM> can be recessed toward the outer surface <NUM> with respect to the inner surface <NUM> at each of the fixation nodes <NUM> and the fixation hub <NUM>. Thus, as will be described in more detail below, the inner surface <NUM> at the fixation hub <NUM> and the nodes <NUM> can be configured to abut the underlying bone <NUM>, while the arms <NUM> remain spaced from the underlying bone <NUM>. Further, the inner surface <NUM> of the bone plate <NUM> can be planar. The outer surface <NUM> of the bone plate <NUM> can be rounded. Referring again to <FIG>, the first and second arms 58a and 58b of each pair of arms <NUM> can cooperate with the fixation hub <NUM> so as to define a respective aperture <NUM> that extends through the fixation body <NUM>. Thus, the apertures <NUM> can extend through the fixation body <NUM> at a location radially between the fixation nodes <NUM> and the fixation hub <NUM>. The apertures <NUM> can be referred to as outer apertures. The apertures <NUM> can be referred to as inner apertures.

The fixation nodes <NUM> of at least one first pair of adjacent fixation nodes <NUM> can be spaced circumferentially from each other a first distance, and the fixation nodes <NUM> of at least one second pair of adjacent fixation nodes <NUM> can be spaced circumferentially from each other a second distance that is different than the first distance. For instance, the second distance can be greater than the first distance. The at least one first pair of adjacent fixation nodes <NUM> can be defined by all pairs of adjacent fixation nodes <NUM>, with respect to a single pair that defines the second pair of adjacent fixation nodes <NUM>. The fixation nodes <NUM> of the second pair can be the inferior-most fixation nodes <NUM> of the bone plate <NUM> when the bone plate <NUM> is secured to the patella <NUM>. It should be appreciated that the nodes <NUM> can be arranged about the fixation hub <NUM> in any manner as desired. For instance, the second distance can be equal to the first distance. Thus, in one example, the fixation nodes <NUM> can be equidistantly spaced circumferentially about the fixation hub <NUM>. While the bone plate <NUM> can include six fixation nodes <NUM>, it should be appreciated that the bone plate <NUM> can include any number of fixation nodes <NUM> as desired. For instance, the bone plate <NUM> can include more than six fixation nodes <NUM>. Alternatively, the bone plate <NUM> can include fewer than six fixation nodes <NUM>.

Referring now to <FIG>, and as described above, the bone plate <NUM> can further include at least one fixation leg <NUM>, such as a plurality of fixation legs <NUM>, that extends out from the fixation body <NUM>. Each of the fixation legs <NUM> can include at least one fixation hole <NUM>. Thus, each of the fixation legs <NUM> can be configured to secure to the patella <NUM> or one or more bone fragments of the patella <NUM> as desired. The fixation legs <NUM> can include a first fixation leg <NUM> that is configured to be secured to an inferior medial aspect of the patella <NUM>. Thus, in one example, the first fixation leg <NUM> can be referred to as an inferior medial fixation leg. The first fixation leg <NUM> can extend both inferiorly and medially from the fixation body <NUM>, and thus can be configured to secure to an inferior medial aspect of the patella <NUM>. The fixation legs <NUM> can further include a second fixation leg <NUM> that is configured to be secured to an inferior lateral aspect of the patella <NUM>. Thus, the second fixation leg <NUM> can be referred to as an inferior lateral fixation leg. The second fixation leg <NUM> can extend both inferiorly and laterally from the fixation body <NUM>, and thus can be configured to secure to a lateral inferior aspect of the patella <NUM>. The fixation legs <NUM> can further include a third fixation leg <NUM> that is configured to be secured to the inferior pole of the patella <NUM>. Thus, the third fixation leg <NUM> can be referred to as an inferior fixation leg <NUM> in certain examples. The third fixation leg <NUM> can be circumferentially disposed between the first and second fixation legs <NUM> and <NUM>. The hub, the nodes, and the legs <NUM>-<NUM> can all be monolithic with each other so as to define a single unitary structure. It should be appreciated that the at least one fixation leg <NUM> can include one or more up to all of the first, second, and third fixation legs <NUM>-<NUM>. Thus, reference to the second leg <NUM> does not necessarily imply that the bone plate <NUM> includes the first leg <NUM>. Further, reference to the third leg <NUM> does not necessarily imply that the bone plate <NUM> includes the first and second legs <NUM> and <NUM>, respectively.

It should be appreciated that the bone plate <NUM> can be configured to be secured to the patella of a patent's right knee or a patient's left knee. In this regard, it should be appreciated that the medial fixation leg when the bone plate <NUM> is secured to the patella of a patient's right knee becomes the lateral fixation leg when the bone plate <NUM> is secured to the patella of a patient's left knee. Similarly, the lateral fixation leg when the bone plate <NUM> is secured to the patella of a patient's right knee becomes the medial fixation leg when the bone plate <NUM> is secured to the patella of a patient's left knee. Thus, reference to the medial fixation leg <NUM> and the lateral fixation leg <NUM> is by way of example only, it being appreciated that the medial fixation leg <NUM> and the lateral fixation leg <NUM> can be reversed.

The fixation legs <NUM> can extend from any location of the fixation body <NUM> as desired. In one example, the first fixation leg <NUM> can extend from a first one of the fixation nodes <NUM>. The second fixation leg <NUM> can similarly extend from a second one of the fixation nodes <NUM>. The first and second fixation nodes <NUM> can define the second pair of fixation nodes <NUM> described above. The third fixation leg <NUM> can extend from the fixation body <NUM> at a location between the first and second ones of the fixation nodes <NUM> of the second pair. In one example, the third fixation leg <NUM> can extend from an eyelet that defines one of the fixation holes <NUM> of the array <NUM>. In particular, the third fixation leg <NUM> can extend from the eyelet that defines the inferior-most one of the fixation holes <NUM> of the array <NUM>, and thus of the fixation hub <NUM>. Thus, the third fixation leg <NUM> can be elongate along a respective central axis that intersects the central hole axis <NUM> of the inferior-most fixation hole <NUM> of the fixation hub <NUM>. The first and second fixation legs <NUM> and <NUM> can extend from the fixation body <NUM> along respective central axes that are offset from the central hub axis <NUM>. The third fixation leg <NUM> can extend from the fixation body <NUM> along a respective central axis that intersects the central hub axis <NUM>.

The fixation legs <NUM> can define any number of fixation holes <NUM> as desired. In one example, the first fixation leg <NUM> can define first and second fixation holes <NUM> that are spaced from each other radially along the fixation leg <NUM>. In particular, the first fixation leg <NUM> can support at least one medial eyelet <NUM> that defines a respective fixation hole <NUM>. In one example, the at least one medial eyelet <NUM> can include first and second medial eyelets <NUM> that each defines a respective fixation hole <NUM>. The first medial eyelet <NUM> can be disposed at a distal terminal end of the first fixation leg <NUM>. Thus, the first medial eyelet <NUM> can also be referred to as a terminal medial eyelet <NUM>. The fixation hole <NUM> defined by the first medial eyelet <NUM> can be referred to as a terminal fixation hole <NUM> The second medial eyelet <NUM> can be disposed between the fixation body <NUM> and the terminal end of the first fixation leg <NUM>. Thus, the second medial eyelet <NUM> can be referred to as an intermediate medial eyelet <NUM>. The fixation hole <NUM> defined by the second medial eyelet <NUM> can be referred to as an intermediate medial fixation hole <NUM>. It should be appreciated that the first fixation leg <NUM> can include any number of intermediate medial eyelets <NUM> as desired. The intermediate medial eyelets <NUM> can be spaced from each other along the respective first fixation leg <NUM>. Alternatively, as illustrated in <FIG>, the at least one medial eyelet <NUM> can include only the first medial eyelet <NUM> and no other medial eyelets <NUM>.

The second fixation leg <NUM> can also define first and second fixation holes <NUM> that are spaced from each other radially along the second fixation leg <NUM>. In particular, the second fixation leg <NUM> can support at least one lateral eyelet <NUM> that defines a respective fixation hole <NUM>. In one example, the at least one lateral eyelet <NUM> can include first and second lateral eyelets <NUM> that each defines a respective fixation hole <NUM>. The first lateral eyelet <NUM> can be disposed at a distal terminal end of the second fixation leg <NUM>. Thus, the first lateral eyelet <NUM> can also be referred to as a terminal lateral eyelet <NUM>. The fixation hole <NUM> defined by the first lateral eyelet <NUM> can be referred to as a terminal fixation hole <NUM> The second lateral eyelet <NUM> can be disposed between the fixation body <NUM> and the terminal end of the second fixation leg <NUM>. Thus, the second lateral eyelet <NUM> can be referred to as an intermediate lateral eyelet <NUM>. The fixation hole <NUM> defined by the second lateral eyelet <NUM> can be referred to as an intermediate lateral fixation hole <NUM>. It should be appreciated that the second fixation leg <NUM> can include any number of intermediate lateral eyelets <NUM> as desired. The intermediate lateral eyelets can be spaced from each other radially along the respective second fixation leg <NUM>. Alternatively, as illustrated in <FIG>, the at least one lateral eyelet <NUM> can include only the first lateral eyelet <NUM> and no other lateral eyelets <NUM>.

The third fixation leg <NUM> can also define first and second fixation holes <NUM> that are spaced from each other radially along the third fixation leg <NUM>. In particular, the third fixation leg <NUM> can support at least one inferior eyelet <NUM> that defines a respective fixation hole <NUM>. In one example, the at least one inferior eyelet <NUM> can include first and second inferior eyelets <NUM> that each defines a respective fixation hole <NUM>. The first inferior eyelet <NUM> can be disposed at a distal terminal end of the third fixation leg <NUM>. Thus, the first inferior eyelet <NUM> can also be referred to as a terminal inferior eyelet <NUM>. The fixation hole <NUM> defined by the first inferior eyelet <NUM> can be referred to as a terminal fixation hole <NUM>. The second inferior eyelet <NUM> can be disposed between the fixation body <NUM> and the terminal end of the third fixation leg <NUM>. Thus, the second inferior eyelet <NUM> can be referred to as an intermediate inferior eyelet <NUM>. The fixation hole <NUM> defined by the second inferior eyelet <NUM> can be referred to as an intermediate inferior fixation hole <NUM>. It should be appreciated that the third fixation leg <NUM> can include any number of intermediate inferior eyelets <NUM> as desired. The intermediate inferior eyelets <NUM> can be spaced from each other radially along the respective third fixation leg <NUM>. Alternatively, as illustrated in <FIG>, the at least one inferior eyelet <NUM> can include only the first inferior eyelet <NUM> and no other inferior eyelets <NUM>.

In this regard, referring to <FIG>, it should be appreciated the bone plate <NUM> can be constructed with shorter fixation legs <NUM> than those illustrated in <FIG>. Otherwise stated, the at least one of the first, second and third fixation legs <NUM>-<NUM> of the bone plate <NUM> illustrated in <FIG> can be shorter than a corresponding at least one of the first, second and third fixation <NUM>-<NUM> the bone plate <NUM> illustrated in <FIG>. Thus, as will be appreciated with respect to the description of <FIG> below, a surgeon can select the bone plate illustrated in <FIG> if additional positional flexibility for the bone anchors is desired along the fixation legs <NUM>. Alternatively or additionally, the surgeon can select the bone plate illustrated in <FIG> if additional length of at least one of the fixation legs <NUM> is desired. Additional length can be desired to allow the bone anchor to be driven into one of the bone fragments. Alternatively or additionally, additional length of at least one or more of the fixation legs <NUM> may be desired in order to bend the one or more fixation legs <NUM> in such a manner so as to cradle and compress the bone fragments against each other. The fixation body <NUM> of the bone plate <NUM> illustrated in <FIG> can be as described with respect to the bone plate illustrated in <FIG>. Thus, the description of the fixation body <NUM> with respect to <FIG> can apply equally to the fixation body <NUM> illustrated in <FIG>.

Alternatively still, referring to <FIG>, the bone plate <NUM> can be constructed without one or more of the fixation legs <NUM> up to all of the fixation legs <NUM>. Thus, as will be appreciated with respect to the description of <FIG> below, a surgeon can select the bone plate <NUM> illustrated in <FIG> if it is not desired to secure the bone plate to the inferior aspect of the patella <NUM>. The fixation body <NUM> of the bone plate <NUM> illustrated in <FIG> is the same as the fixation body <NUM> illustrated and described above with respect to the bone plate <NUM> illustrated in <FIG>. Thus, the description of the fixation body <NUM> with respect to <FIG> can apply equally to the fixation body <NUM> illustrated in <FIG>. In one example, the outer surface <NUM> of the bone plate <NUM> illustrated in <FIG> can define an open area that is a percentage of an overall area of the outer surface <NUM>. The overall area of the outer surface <NUM> can be measured by determining the area of the outer surface <NUM> when the bone plate <NUM> does not include any of the fixation holes <NUM>, apertures <NUM>, and apertures <NUM>. Thus, the overall area of the outer surface <NUM> can be calculated when an entirety of the outer surface is continuous and uninterrupted. The actual area of the outer surface <NUM> of the bone plate <NUM> can be determined including all disruptions. The disruptions can be defined by the fixation holes <NUM>, the apertures <NUM>, and the apertures <NUM>. The actual area can be subtracted from the overall area to determine the open area of the outer surface <NUM>. The open area can be a percentage of the overall area. For instance, the percentage can be in a range from <NUM>% to <NUM>%. In one example, the percentage can range from <NUM>% to <NUM>%. For instance, the percentage can be <NUM>% +/- <NUM>%. Thus, as described above, the bone plate <NUM> can be malleable, and can include visualization windows and herniation windows while, at the same time, being sufficiently rigid. The bone plate <NUM> can be constructed to define any suitable overall area as desired. In one example, the overall area can be less than <NUM><NUM>. For instance, the overall area can be between <NUM><NUM> and <NUM><NUM>. In one example, the overall area can be between <NUM><NUM> and <NUM><NUM>. For instance, the overall area can be between <NUM><NUM> and <NUM><NUM>.

As illustrated in <FIG>, the inner surface <NUM> of the bone plate <NUM> at the first fixation leg <NUM> can be recessed toward the outer surface <NUM> with respect to the inner surface <NUM> at each of the at least one medial eyelet <NUM>. Thus, as will be described in more detail below, the inner surface <NUM> at the at least one medial eyelet <NUM> can be configured to abut the underlying bone <NUM>, while the inner surface <NUM> at the first fixation leg <NUM> remain spaced from the underlying bone <NUM>. Further, the inner surface <NUM> of the bone plate <NUM> at the second fixation leg <NUM> can be recessed toward the outer surface <NUM> with respect to the inner surface <NUM> at each at least one lateral eyelet <NUM>. Thus, as will be described in more detail below, the inner surface <NUM> at the at least one lateral eyelet <NUM> can be configured to abut the underlying bone <NUM>, while the inner surface <NUM> at the second fixation leg <NUM> remains spaced from the underlying bone <NUM>. Further, the inner surface <NUM> of the bone plate <NUM> at the third fixation leg <NUM> can be recessed toward the outer surface <NUM> with respect to the inner surface <NUM> at each at least one inferior eyelet <NUM>. Thus, as will be described in more detail below, the inner surface <NUM> at the at least one inferior eyelet <NUM> can be configured to abut the underlying bone <NUM>, while the inner surface <NUM> at the third fixation leg <NUM> remains spaced from the underlying bone <NUM>.

The fixation legs <NUM> can extend tangential to the curvature of the dome shape of the fixation body <NUM> as illustrated in <FIG>. Further, the first, second, and third fixation legs <NUM>, <NUM>, and <NUM>, respectively, can be circumferentially spaced from each other, thus, the first, second, and third fixation legs <NUM>, <NUM>, and <NUM> can all lie on respective different planes.

Referring now to <FIG>, the bone plate <NUM> can be configured as described above with respect to <FIG>. However, in <FIG>, the fixation hub <NUM> can include first and second arrays <NUM> and <NUM> of fixation holes <NUM>. In this regard, the array <NUM> of fixation holes <NUM> described above with respect to the bone plate <NUM> illustrated in <FIG> can be referred to as a first array <NUM> of fixation holes. As illustrated in <FIG>, the fixation hub <NUM> can include the second array <NUM> of fixation holes <NUM>. Thus, the fixation hub <NUM> of the bone plate <NUM> illustrated in <FIG> can be sized larger than the fixation hub <NUM> of the bone plate <NUM> illustrated in <FIG> so as to include the first and second arrays <NUM> and <NUM> of fixation holes <NUM>. Further, because the bone plate <NUM> illustrated in <FIG> includes the additional second array <NUM> of fixation holes <NUM>, the bone plate <NUM> illustrated in <FIG> can allow for fixation to bone fragments at additional locations with respect to the bone plate <NUM> illustrated in <FIG> having only the single array <NUM> of fixation holes <NUM>.

The second array <NUM> can be configured as a circumferential array. Thus, the second array can surround the geometric center <NUM> of the hub <NUM>. The fixation holes <NUM> of the second array <NUM> can be offset radially outward with respect to the fixation holes <NUM> of the first array <NUM>. For instance, the respective hole axes of the fixation holes <NUM> of the first array <NUM> can be spaced from the central hub axis <NUM> a first distance, and the respective hole axes of the fixation holes <NUM> of the second array <NUM> can be spaced from the central hub axis <NUM> a second distance that is greater than the first distance. Thus, the first array <NUM> of fixation holes <NUM> can be referred to as an inner array, and the second array <NUM> of fixation holes <NUM> can be referred to as an outer array. The first array <NUM> of fixation holes can be constructed as described above with respect to the bone plate illustrated in <FIG>.

The fixation holes <NUM> of the second array <NUM> can be arranged along a path that extends about the geometric center <NUM>. For instance, the path of the second array can be a closed path that surrounds the geometric center <NUM>. In one example, the path of the second array <NUM> can define a second circle. The central hub axis <NUM> can define the center of the second circle. Thus, the second circle can be concentric with the circle defined by the central hole axes <NUM> of the fixation holes <NUM> of the first array <NUM>. The circle defined by the central hole axes <NUM> of the fixation holes <NUM> of the first array <NUM> can be referred to as a first circle. The first circle can be can be disposed between the second circle and the central hub axis <NUM>. The central hole axes <NUM> (see <FIG>) of the fixation holes <NUM> of the second array <NUM> can lie on the second circle.

In one example, the fixation holes <NUM> of the second array <NUM> can be spaced equidistantly from each other along the second circle. Alternatively, the fixation holes <NUM> can be spaced at variable distances from each other. Further, while the fixation holes <NUM> of the second array <NUM> can be arranged on the circular path, it should be appreciated that the fixation holes <NUM> of the second array <NUM> can be alternatively arranged as desired. For instance, the fixation holes <NUM> of the second array <NUM> can lie on any curved path. The curved path can define an ellipse in one example. Alternatively, the path can define a polygon. For instance, the central hole axes <NUM> of the fixation holes of the second array <NUM> can define the vertices, respectively, of the polygon. In one example, as illustrated in <FIG>, the polygon can be a regular polygon. Alternatively, the polygon can be an irregular polygon.

In one example, the second array <NUM> can include six fixation holes <NUM>. Thus, the regular polygon can be configured as a hexagon. It should be appreciated, however, that the second array <NUM> can include any number of fixation holes <NUM> as desired. In one example, the fixation hole <NUM> at the geometric center <NUM> and the fixation holes <NUM> of the first and second arrays <NUM> and <NUM> can constitute all fixation holes <NUM> of the fixation hub <NUM>. Alternatively, the fixation hub <NUM> can include at least one additional fixation hole <NUM> in addition to the fixation hole <NUM> at the geometric center <NUM> and the fixation holes <NUM> of the first and second arrays <NUM> and <NUM>. The at least one additional fixation hole <NUM> can be disposed between the geometric center <NUM> and the array <NUM>. Alternatively or additionally, the at least one additional fixation hole <NUM> can be disposed between the first array <NUM> and the second array <NUM>. Alternatively or additionally still, the at least one additional fixation hole <NUM> can be disposed radially outward of the second array <NUM>. Thus, the second array <NUM> can be disposed between the at least one additional fixation hole <NUM> and the geometric center <NUM>.

The radially outer surfaces of the eyelets that define the fixation holes <NUM> of the first and second arrays <NUM> and <NUM> can define the outer perimeter of the fixation body <NUM>. The radially outer surfaces of the eyelets that define the fixation holes <NUM> of the second array <NUM> can be offset radially outward (i.e., away from the central hub axis <NUM>) with respect the radially outer surfaces of the eyelets that define the fixation holes <NUM> of the first array <NUM>. Further, eyelets that define the fixation holes <NUM> of the first array <NUM> can be alternatingly arranged with the eyelets that define the fixation holes <NUM> of the second array <NUM>. Thus, each of the eyelets that define the fixation holes <NUM> of the first array <NUM> can be interconnected between adjacent ones of the eyelets that define the fixation holes <NUM> of the second array <NUM>. Further, each of the eyelets that define the fixation holes <NUM> of the second array <NUM> can be interconnected between adjacent ones of the eyelets that define the fixation holes <NUM> of the first array <NUM>.

The apertures <NUM> can be positioned circumferentially offset with respect to the fixation holes <NUM> of the first array <NUM>. For instance, the straight lines <NUM> that intersect each of the central hub axis <NUM> and the central hole axes of respective ones of the fixation holes <NUM> of the first array <NUM> do not intersect the apertures <NUM> with respect to a top or bottom plan view of the bone plate <NUM>. That is, the straight lines <NUM> can be circumferentially offset from the apertures <NUM>. For instance, the straight lines <NUM> can be circumferentially equidistantly spaced from adjacent ones of the apertures <NUM>.

Further, the apertures <NUM> can be elongate along the radial direction. Thus, in one example, the central axes <NUM> of the apertures <NUM> can intersect the central hub axis <NUM>. Further, the central axes <NUM> of the apertures <NUM> can intersect the central hole axis of a respective aligned one of the fixation holes <NUM> of the second array <NUM>. Thus, the apertures <NUM> can be disposed radially between a respective one of the fixation holes <NUM> of the second array and the geometric center of the hub <NUM>. Further, the apertures <NUM> can be disposed between adjacent ones of the fixation holes <NUM> of the first array <NUM> with respect to the circumferential direction. Accordingly, straight lines <NUM> can pass through the central hub axis <NUM>, the central hole axis <NUM> of a respective one of the fixation holes <NUM> of the second array <NUM>, and can be coincident with the central axis <NUM> of a respective one of the apertures <NUM> with respect to a top or bottom plan view of the bone plate. The apertures <NUM> can be define any suitable shape as desired. In one example, the apertures <NUM> can define the shape of an arrow that points toward the geometric center <NUM>. Further, the apertures <NUM> can span a majority of the radial distance from a respective aligned one of the fixation holes <NUM> of the second array <NUM> and the fixation hole <NUM> at the geometric center <NUM>.

The geometric centers of the apertures <NUM> can lie on a respective circle that surrounds the geometric center <NUM> of the hub <NUM>. For instance, the geometric center <NUM> of the hub <NUM> can define the center of the circle defined by the geometric centers of the apertures <NUM>. Thus, the circle defined by the geometric centers of the apertures <NUM> can be concentric with each of the first and second circles. Further, in one example, the first circle can be disposed between the circle defined by the geometric centers of the apertures <NUM> and the second circle.

With continuing reference to <FIG>, and as described above, the fixation body <NUM> can include the plurality of fixation nodes <NUM> that are connected to the hub <NUM>. In particular, the fixation body <NUM> includes a pair of arms <NUM>, that extends radially outward from the fixation hub <NUM> to a respective at least one of the fixation nodes <NUM>. Thus, each of the fixation nodes <NUM> can be attached to the fixation hub <NUM> by the respective arms <NUM>. The pair of arms <NUM> can extend to the outer surface <NUM> of the eyelet <NUM>. Thus, each of the fixation nodes <NUM> can be secured to the fixation hub <NUM> by a respective pair of arms <NUM>. Each pair of arms <NUM> can be defined by a first arm 58a and a second arm 58b. The arms 58a and 58b of each pair can converge toward each other as they extend from the fixation hub <NUM> to the respective one of the fixation nodes <NUM>. Further, each of the arms <NUM> can extend from the fixation hub <NUM> to the respective one of the nodes <NUM> along a arm axis that intersects the central hole axis <NUM> of a respective aligned one of the fixation holes <NUM> of the second array <NUM>. The respective aligned one of the fixation holes <NUM> of the first arm 58a can be adjacent to the respective aligned one of the fixation holes <NUM> of the second arm 58b along the array <NUM>.

Further, the first and second arms 58a and 58b of each pair of arms <NUM> can cooperate with the fixation hub <NUM> so as to define a respective aperture <NUM> that extends through the fixation body <NUM>. Thus, the apertures <NUM> can extend through the fixation body <NUM> at a location radially between the fixation nodes <NUM> and the fixation hub <NUM>. The apertures <NUM> can be referred to as outer apertures. The apertures <NUM> can be referred to as inner apertures. The outer apertures <NUM> can be defined by a respective one of the nodes <NUM>, a respective pair of adjacent eyelets that defines respective fixation holes <NUM> of the second array <NUM>, and a respective one of the eyelets that defines the fixation hole <NUM> of the first array <NUM>. The respective one of the eyelets that defines the fixation hole <NUM> of the first array <NUM> is interconnected between the adjacent eyelets of the respective pair of eyelets that defines the respective fixation holes <NUM> of the second array.

Further still, the bone plate illustrated in <FIG> can include at least fixation leg <NUM> in the manner described above with respect to <FIG>. Thus, the description of the legs <NUM>-<NUM> above with respect to <FIG> can apply to the fixation legs <NUM>-<NUM> illustrated in <FIG> unless otherwise indicated. The at least one fixation leg <NUM> can include the first fixation leg <NUM> that is configured to be secured to a medial aspect of the patella <NUM>, the second fixation leg <NUM> that is configured to be secured to a lateral aspect of the patella <NUM>, and the third fixation leg <NUM> that is configured to be secured to the inferior pole of the patella <NUM>. The fixation legs <NUM> can extend from any location of the fixation body <NUM> as desired. In one example, the first fixation leg <NUM> can extend from a first one of the fixation nodes <NUM>. The second fixation leg <NUM> can similarly extend from a second one of the fixation nodes <NUM>. The third fixation leg <NUM> can extend from the fixation body <NUM> at a location between the first and second ones of the fixation nodes <NUM>. In one example, the third fixation leg <NUM> can extend from an eyelet that defines one of the fixation holes <NUM> of the second array <NUM>. In particular, the third fixation leg <NUM> can extend from the eyelet that defines the inferior-most one of the fixation holes <NUM> of the second array <NUM>, and thus of the fixation hub <NUM>. Thus, the third fixation leg <NUM> can be elongate along a respective central axis that intersects the central hole axis of the inferior-most fixation hole <NUM> of the fixation hub <NUM>. The inferior-most one of the fixation holes <NUM> of the second array <NUM> can be interconnected between the first and second ones of the fixation nodes <NUM>.

Referring now to <FIG> generally, the fixation legs <NUM> can define any number of fixation holes <NUM> as desired. In one example illustrated in <FIG>, the first fixation leg <NUM> can define first and second fixation holes <NUM> that are spaced from each other radially along the fixation leg <NUM>. In particular, the first fixation leg <NUM> can support at least one medial eyelet <NUM> that defines a respective fixation hole <NUM>. In one example, the at least one medial eyelet <NUM> can include first and second medial eyelets <NUM> that each defines a respective fixation hole <NUM>. The first medial eyelet <NUM> can be disposed at a distal terminal end of the first fixation leg <NUM>. Thus, the first medial eyelet <NUM> can also be referred to as a terminal medial eyelet <NUM>. The fixation hole <NUM> defined by the first medial eyelet <NUM> can be referred to as a terminal fixation hole <NUM> The second medial eyelet <NUM> can be disposed between the fixation body <NUM> and the terminal end of the first fixation leg <NUM>. Thus, the second medial eyelet <NUM> can be referred to as an intermediate medial eyelet <NUM>. The fixation hole <NUM> defined by the second medial eyelet <NUM> can be referred to as an intermediate medial fixation hole <NUM>. It should be appreciated that the first fixation leg <NUM> can include any number of intermediate medial eyelets <NUM> as desired. The intermediate medial eyelets <NUM> can be spaced from each other along the respective first fixation leg <NUM>. Alternatively, as illustrated in <FIG>, the at least one medial eyelet <NUM> can include only the first medial eyelet <NUM> and no other medial eyelets <NUM>.

In this regard, referring to <FIG>, it should be appreciated the bone plate <NUM> can be constructed with shorter fixation legs <NUM> than those illustrated in <FIG>. Otherwise stated, the at least one of the first, second and third fixation legs <NUM>-<NUM> of the bone plate <NUM> illustrated in <FIG> can be shorter than a corresponding at least one of the first, second and third fixation <NUM>-<NUM> the bone plate <NUM> illustrated in Figs. The fixation body <NUM> of the bone plate <NUM> illustrated in <FIG> can be as described with respect to the bone plate illustrated in <FIG>. Thus, the description of the fixation body <NUM> with respect to <FIG> can apply equally to the fixation body <NUM> illustrated in <FIG>.

Alternatively still, referring to <FIG>, the bone plate <NUM> can be constructed without one or more of the fixation legs <NUM> up to all of the fixation legs <NUM>. Thus, the bone plate <NUM> can include the fixation body <NUM> including the fixation hub <NUM> and the fixation nodes <NUM>, but no fixation legs <NUM>. The fixation body <NUM> of the bone plate <NUM> illustrated in <FIG> is the same as the fixation body <NUM> illustrated and described above with respect to the bone plate <NUM> illustrated in <FIG>. Thus, the description of the fixation body <NUM> with respect to <FIG>can apply equally to the fixation body <NUM> illustrated in <FIG>. In one example, the outer surface <NUM> of the bone plate <NUM> illustrated in <FIG> can define an open area that is a percentage of an overall area of the outer surface <NUM>. The overall area of the outer surface <NUM> can be measured by determining the area of the outer surface <NUM> when the bone plate <NUM> does not include any of the fixation holes <NUM>, apertures <NUM>, and apertures <NUM>. Thus, the overall area of the outer surface <NUM> can be calculated when an entirety of the outer surface is continuous and uninterrupted. The actual area of the outer surface <NUM> of the bone plate <NUM> can be determined including all disruptions. The disruptions can be defined by the fixation holes <NUM>, the apertures <NUM>, and the apertures <NUM>. The actual area can be subtracted from the overall area to determine the open area of the outer surface <NUM>. The open area can be a percentage of the overall area. For instance, the percentage greater than <NUM>%. For instance, the percentage can range from <NUM>% to <NUM>%. In one example, the percentage can range from <NUM>% to <NUM>%. For instance, the percentage can range from <NUM>% to <NUM>%. In one example, the percentage can be substantially <NUM>%. Thus, as described above, the bone plate <NUM> can be malleable, and can include visualization windows and herniation windows while, at the same time, being sufficiently rigid. The bone plate <NUM> can be constructed to define any suitable overall area as desired. In one example, the overall area can be greater than <NUM><NUM>. For instance, the overall area can be greater than <NUM><NUM>. In one example, the overall area can range from <NUM><NUM> and <NUM><NUM>. For instance, the overall area can range from <NUM><NUM> to <NUM><NUM>. For instance, the overall area can range from <NUM><NUM> to <NUM><NUM>.

Thus, referring to <FIG> in general, it can be said that the fixation body <NUM>, and thus the bone plate <NUM>, includes at least one array of fixation holes <NUM> that extend through the hub <NUM>. The at least one array can include a single array <NUM> as illustrated in <FIG>. Alternatively, the at least one array can include first and second arrays <NUM> and <NUM> as illustrated in <FIG>. It should be appreciated, however, that the fixation body <NUM> can include any suitable number of arrays of fixation holes <NUM> that extend through the fixation hub <NUM> as desired. Further, it can be said that the bone plate <NUM> can include at least one fixation leg that extends from the fixation body <NUM>. The at least one fixation leg can have a sufficient length to be bent around a peripheral rim of the patella as described in more detail below. For instance, the at least one fixation leg can include the first fixation leg <NUM>, the second fixation leg <NUM>, and the third fixation leg <NUM>. The fixation legs <NUM>-<NUM> can define any number of fixation holes <NUM> as desired. For instance, in one example, the fixation legs <NUM>-<NUM> can define first and second fixation hole <NUM>. In another example, the fixation legs <NUM>-<NUM> can define a single fixation hole <NUM>.

In this regard, it should be appreciated that a kit of bone plates <NUM> can be provided. The kit can include at least one first bone plate <NUM> having a fixation body <NUM> with the single array <NUM> of fixation holes <NUM>. The kit can include at least one second bone plate <NUM> having a fixation body with the first and second arrays <NUM> and <NUM> of fixation holes <NUM>. The second bone plate can be sized larger than the first bone plate. The at least one first bone plate <NUM> can include bone plates <NUM> having the at least one fixation leg <NUM>. Ones of the first bone plates <NUM> having the at least one fixation leg <NUM> can include different numbers of fixation holes <NUM> that extends through the at least one fixation leg. Alternatively or additionally, the at least one first bone plate <NUM> can include at least one bone plate <NUM> having no fixation legs <NUM>. Similarly, the at least one second bone plate <NUM> can include bone plates <NUM> having the at least one fixation leg <NUM>. Ones of the second bone plates <NUM> having the at least one fixation leg <NUM> can include different numbers of fixation holes <NUM> that extends through the at least one fixation leg. Alternatively or additionally, the at least one second bone plate <NUM> can include at least one bone plate <NUM> having no fixation legs <NUM>.

A method (not claimed) of securing the fixation plate <NUM> to the underlying bone <NUM> will now be described with reference to <FIG>. In particular, the method can begin by creating an incision that exposes the anterior aspect of the patella <NUM>. Thus, the bone plate <NUM> can be placed against the patella <NUM> along an anterior approach. As illustrated, the patella <NUM> is fractured and defines a plurality of patellar bone fragments <NUM>. In instances where the patella <NUM> is severely comminuted, the bone fragments <NUM> can be compressed against each other thereby reducing the fracture using any suitable clamp or forceps. The bone plate <NUM> can then be placed against the underlying patella <NUM>. The bone plate <NUM> can further be contoured so as to conform to the underlying patella <NUM>. For instance, the bone plate body <NUM> can be contoured by bending one or more of the arms <NUM>. One or more up to all of the legs <NUM>-<NUM> can also be bent so as to conform to the underlying patella <NUM>. As described above, the inner surface <NUM> at the arms <NUM> can be recessed toward the outer surface <NUM> with respect to the inner surface <NUM> at each of the fixation nodes <NUM> and the fixation hub <NUM>. Further, the inner surface at the legs <NUM> can be recessed toward the outer surface <NUM> with respect to the inner surface <NUM> at the eyelets that define the fixation holes <NUM> of the legs <NUM>. Thus, the inner surface <NUM> at the arms <NUM> and the legs <NUM> can be spaced from the patella <NUM>. The fixation hub <NUM>, the fixation nodes <NUM>, and the eyelets of the legs <NUM> (if present) can abut the patella <NUM>.

In this regard, it should be appreciated that the apertures <NUM> of the bone plate <NUM> can assist in the malleability of the bone plate <NUM>. Thus, the bone plate <NUM> can be bent as desired so as to conform to the underlying patella <NUM>. The apertures <NUM> of the bone plate <NUM> of <FIG> can further assist in the malleability of the bone plate <NUM>. Thus, the bone plate <NUM> can be bent in situ to conform to the outer surface of the patella <NUM>. In particular, the fixation hub <NUM> can be bent as desired to better conform to the outer surface of the patella <NUM> than the preformed dome shape of the fixation hub <NUM>. Further, the arms <NUM> can be bent out of plane. Out of plane bending can include a first inward direction toward the underlying bone. The inward direction can be generally defined as from the outer surface <NUM> to the inner surface <NUM>. Out of plane bending can include a second outward direction away from the underlying bone. The outward direction can be generally defined as from the inner surface <NUM> to the inner outer surface <NUM>. Alternatively or additionally, the arms <NUM> can be bent in-plane. That is, the arms <NUM> can be bent so as to not move further from or closer to the underlying patella while, at the same time, maintaining their respective angular orientations. Alternatively or additionally still, the arms <NUM> can further be twisted so as to adjust the angular orientation of the inner surface <NUM> at the eyelets that define the fixation holes <NUM> of the nodes <NUM>. Thus, one or more of the arms <NUM> can be deformed so as to cause the inner surface <NUM> at the nodes <NUM> to better conform to the surface of the patella <NUM>.

In one example, the arms <NUM> can be bent such that the fixation holes <NUM> of at least one of the nodes <NUM> can be aligned with the patellar rim. For instance, depending on the size of the bone plate <NUM> and the size of the patella <NUM>, all of the nodes can extend at least to the patellar rim. Thus, the respective bone anchors <NUM> can be driven through the fixation holes <NUM> of at least one or more of the nodes <NUM> and into the patellar rim in a substantially posterior direction. In another example, at least one or more of the arms <NUM> can be bent such that the node <NUM> extends about the patellar rim. Thus, the respective bone anchor <NUM> can be driven through the fixation hole <NUM> of the node <NUM> substantially in a plane that is oriented substantially perpendicular to the posterior direction.

Further, one or more up to all of the legs <NUM>-<NUM> can be bent as desired to better conform to the outer surface of the patella <NUM>. For instance, one or more up to all of the legs <NUM>-<NUM> can be bent out of plane. Alternatively or additionally, one or more up to all of the legs <NUM>-<NUM> can be bent out in plane. Alternatively or additionally still, one or more up to all of the legs <NUM>-<NUM> can be twisted so as to adjust the angular orientation of the inner surface <NUM> at the eyelets that define the fixation holes <NUM> of the nodes <NUM>. Thus, one or more of the legs <NUM>-<NUM> can be deformed so as to cause the inner surface <NUM> at the one or more of the legs <NUM>-<NUM> to better conform to the surface of the patella <NUM>.

Once the bone plate <NUM> has been placed against the patella <NUM> and bent as desired, the method (not claimed) can including the steps of driving bone anchors <NUM> into respective ones of the fixation holes <NUM> of the bone plate <NUM>. For instance, the method (not claimed) can include the step of identifying fixation holes <NUM> of the bone plate <NUM> that are aligned with one or more bone fragments <NUM>, such that driving a bone anchor <NUM> through the aligned fixation holes <NUM> will gain reliable purchase with the bone fragment <NUM>. Next, the bone anchors <NUM> can be driven into the identified fixation holes <NUM>. In this regard, it is appreciated that the fixation hub <NUM> can include one or more of the identified fixation holes <NUM>. Alternatively or additionally, the fixation nodes <NUM> can include one or more of the identified fixation holes <NUM>.

As illustrated in <FIG>, one of the bone anchors <NUM> can extend through the third fixation leg <NUM>, through a near cortex to a far cortex opposite the near cortex. Thus, the bone anchor <NUM> can threadedly purchase with both the near cortex and the far cortex. In one example, the near cortex can be defined by the inferior pole of the patella <NUM>, and the far cortex can be defined by the superior pole of the patella <NUM>. As will be appreciated from the description below, it will be appreciated that the near cortex can alternatively be defined by the superior pole of the patella <NUM> and the far cortex can be defined by the inferior pole of the patella. Alternatively, the near cortex can be defined by the medial cortex of the patella <NUM> and the far cortex can be defined by the lateral cortex of the patella. Alternatively still, the near cortex can be defined by the lateral cortex of the patella <NUM> and the far cortex can be defined by the medial cortex of the patella.

It is further recognized that the inferior pole <NUM> of the patella <NUM> can often be comminuted, and can contain osteoporotic bone. In fact, inferior pole comminution has been observed in <NUM>% of fractures of the patella <NUM>. Accordingly, fixation of the bone plate <NUM> to the patella <NUM> can be augmented by suture fixation if desired. The method (not claimed) of fixation can further include the step of augmenting fixation of the bone plate <NUM> to the patella <NUM> by fixing at least one suture to the patellar tendon <NUM> and to the plate <NUM>. In one example, the sutures can be configured as FiberWire® sutures commercially available from Arthrex, having a place of business in Naples, FL, though it should be appreciated that any suitable suture is envisioned. Thus, the method (not claimed) can include the step of attaching one or more sutures to the patellar tendon <NUM>. The sutures can thus be included in the fixation system. In one example, the sutures can be stitched through the patellar tendon <NUM> in a Krackow configuration. The free end of the suture can then be passed over the plate in the inferior direction, and tied to the plate <NUM>. For instance, the sutures can be inserted through respective ones of the apertures <NUM> and the apertures <NUM> (if present) so as to tie the bone plate <NUM> to the patellar tendon <NUM>.

In some examples, as illustrated in <FIG>, the bone plate <NUM> can include at least one leg <NUM> that extends from the fixation body <NUM>. The at least one leg <NUM> (if present) can be deformed so as to cause the inner surface <NUM> at the at least one eyelet supported by the leg to better conform to the surface of the patella <NUM>. For instance, the at least one leg <NUM> can be bent in plane, bent out of plane, and twisted as desired. Thus, the first or inferior medial leg <NUM> (if present) can be deformed so as to cause the inner surface <NUM> at the at least one medial eyelet <NUM> to abut the patella <NUM>. In one example, the first leg <NUM> can have a length sufficient so as to extend around the medial inferior rim <NUM> of the patella <NUM>. Thus, the first leg <NUM> can be deformed so as to cause the inner surface <NUM> at the at least one medial eyelet <NUM> to abut the patella <NUM>. In one example, the first leg <NUM> can have a length sufficient so as to extend around the medial inferior rim <NUM> of the patella <NUM>. The first leg <NUM> can be deformed such that the respective at least one fixation hole <NUM> can receive a bone anchor <NUM> that reliably secures the medial leg <NUM> to a bone fragment <NUM>.

Further, the second or lateral leg <NUM> (if present) can be deformed so as to cause the inner surface <NUM> at the at least one lateral eyelet <NUM> to abut the patella <NUM>. In one example, the second leg <NUM> can have a length sufficient so as to extend around the lateral inferior rim <NUM> of the patella <NUM>. Thus, the second leg <NUM> can be deformed so as to cause the inner surface <NUM> at the at least one lateral eyelet <NUM> to abut the patella <NUM>. In one example, the second leg <NUM> can have a length sufficient so as to extend around the lateral inferior rim <NUM> of the patella <NUM>. The second leg <NUM> can be deformed such that the respective at least one fixation hole <NUM> can receive a bone anchor <NUM> that reliably secures the second leg <NUM> to a bone fragment <NUM>.

Further, still, the third or inferior leg <NUM> (if present) can be deformed so as to cause the inner surface <NUM> at the at least one inferior eyelet <NUM> to abut the patella <NUM>. In one example, the third leg <NUM> can have a length sufficient so as to extend around the inferior pole <NUM> of the patella <NUM>. Thus, the third leg <NUM> can be deformed so as to cause the inner surface <NUM> at the at least one inferior eyelet <NUM> to abut the patella inferior pole <NUM>. In one example, the third leg <NUM> can have a length sufficient so as to extend around the inferior pole <NUM>. Further, an incision <NUM> can be made through the patellar tendon <NUM>, and the third leg <NUM> can be inserted through the incision <NUM> so as to rest against the patella <NUM> at a position posterior of the patellar tendon <NUM>. The third leg <NUM> can be deformed such that the respective at least one fixation hole <NUM> can receive a bone anchor <NUM> that reliably secures the third leg <NUM> to a bone fragment <NUM>. It is further recognized that the first leg <NUM>, the second leg <NUM>, and the third leg <NUM> can all abut the inferior aspect of the patella <NUM> in different planes, thereby forming a cradle that maintains comminuted bone fragments compressed against adjacent bone fragments. Thus, the first leg <NUM>, the second leg <NUM>, and the third leg <NUM> can apply a compression force to the inferior aspect of the patella <NUM> that causes the bone fragments <NUM> to compress against each other, thereby facilitating healing.

Referring now to <FIG>, it is recognized that some patella fractures do not involve comminutions at the inferior pole <NUM>. Accordingly, in order to avoid creating unnecessary incisions in the patellar tendon <NUM>, the bone plate <NUM> described above can include the first leg <NUM> and the second leg <NUM>, but can lack the third leg <NUM>. Alternatively, the third leg <NUM> can be removable from the fixation body <NUM>. For instance, a cutting implement can sever the third leg <NUM> from the fixation body <NUM>. Alternatively or additionally, the third leg <NUM> can define a weakened break-away region. The weakened break-away region can define a material thickness less than the material thickness at a remainder of the inferior leg. The break-away region can be immediately adjacent the fixation body <NUM> so as to eliminate potential irritating projections and sharp edges when the third leg <NUM> is removed. In this regard, any one or more up to all of the first, second, and third legs <NUM>-<NUM> can be removed from the bone plate <NUM> as desired.

As described above, the bone plate <NUM> can be oriented such that the at least one fixation leg <NUM> extend inferiorly from the fixation body <NUM>. It should be appreciated, of course, that the bone plate <NUM> can be fixed to the patella <NUM> in any orientation as desired. For instance, referring to <FIG>, the bone plate <NUM> can be fixed to the patella <NUM> such that the at least one fixation leg <NUM> extends superiorly from the fixation body <NUM>. Thus, the first fixation leg <NUM> can extend to a superior medial aspect of the patella <NUM>. The second fixation leg <NUM> can extend to a superior inferior lateral aspect of the patella <NUM>. The third fixation leg <NUM> can extend to the superior pole of the patella <NUM>. Alternatively, referring to <FIG>, the bone plate <NUM> can be fixed to the patella <NUM> such that the at least one fixation leg <NUM> extends medially from the fixation body <NUM>. Accordingly, the at least one fixation leg <NUM> can extend to the medial rim of the patella <NUM>. For instance, the first fixation leg <NUM> can extend to an inferior aspect of the medial rim. The second fixation leg <NUM> can extend to a superior aspect of the medial rim. The third fixation leg <NUM> can extend to a central region of the medial rim. Alternatively still, referring to <FIG>, the bone plate <NUM> can be fixed to the patella <NUM> such that the at least one fixation leg <NUM> extends laterally from the fixation body <NUM>. Accordingly, the at least one fixation leg <NUM> can extend to the lateral rim of the patella <NUM>. For instance, the first fixation leg <NUM> can extend to a superior aspect of the lateral rim. The second fixation leg <NUM> can extend to an inferior aspect of the lateral rim. The third fixation leg <NUM> can extend to a central region of the lateral rim.

As described above, the bone plate <NUM> can include a group of at least one fixation leg <NUM>. However, as illustrated in <FIG>, the bone plate <NUM> can include first and second groups 88a and 88b of at least one fixation leg. The first and second groups 88a and 88b can be positioned substantially opposite each other. Thus, the at least one leg <NUM> of one of the first and second groups 88a and 88b can extend inferiorly from the fixation body <NUM> in the manner described above, and the at least one leg <NUM> of one of the other of the first and second groups 88a and 88b can extend superiorly from the fixation body <NUM> in the manner described above. Alternatively, the at least one leg <NUM> of one of the first and second groups 88a and 88b can extend medially from the fixation body <NUM> in the manner described above, and the at least one leg <NUM> of the other of the first and second groups 88a and 88b can extend laterally from the fixation body <NUM> in the manner described above.

As illustrated in <FIG>, the first and second groups 88a and 88b can be spaced at substantially <NUM> degrees from each other, such that the first and second groups 88a and 88b are opposite each other. It should be appreciated, of course, that the first and second groups 88a and 88b can be spaced from each other at any angle as desired. For instance, the first and second groups 88a and 88b can be spaced at substantially <NUM> degrees circumferentially from each other. Thus, the at least one leg <NUM> of one of the first and second groups 88a and 88b can extend inferiorly from the fixation body <NUM> in the manner described above, and the at least one leg <NUM> of the other of the first and second groups 88a and 88b can extend medially or laterally from the fixation body <NUM> in the manner described above. Alternatively, the at least one leg <NUM> of one of the first and second groups 88a and 88b can extend superiorly from the fixation body <NUM> in the manner described above, and the at least one leg <NUM> of the other of the first and second groups 88a and 88b can extend medially or laterally from the fixation body <NUM> in the manner described above. Alternatively still, the bone plate <NUM> can include three or more groups of at least one fixation leg <NUM>. For instance, the bone plate <NUM> can include three groups of at least one fixation leg equidistantly spaced about the fixation body <NUM>. Alternatively, the three groups can be spaced at different distances from each other. For instance, adjacent pars of the three groups can be spaced at substantially <NUM> degrees from each other, and one adjacent pair of the three groups can be spaced at substantially <NUM> degrees from each other. In another example, the bone plate can include four groups of at least one fixation leg <NUM> that are spaced equidistantly from each other. Thus, the at least one fixation leg <NUM> of a first group of the four groups can extend inferiorly from the fixation body <NUM> in the manner descried above, the at least one fixation leg of a second group of the four groups can extend superiorly from the fixation body <NUM> in the manner descried above, the at least one fixation leg of a third group of the four groups can extend medially from the fixation body <NUM> in the manner descried above, and the at least one fixation leg of a fourth group of the four groups can extend laterally from the fixation body <NUM> in the manner descried above.

Claim 1:
A patella bone plate (<NUM>) comprising:
a fixation body (<NUM>) including:
a fixation hub (<NUM>) having an inner surface (<NUM>) configured to face the patella bone (<NUM>) and an outer surface (<NUM>) opposite the inner surface (<NUM>), and an array (<NUM>) of fixation holes (<NUM>) that extend through the fixation hub (<NUM>) from the inner surface to the outer surface; and
a plurality of fixation nodes (<NUM>) that extend from the fixation hub (<NUM>), each of the plurality of fixation nodes (<NUM>) defining a respective fixation hole (<NUM>); and
at least one leg (<NUM>) that extends out from the body (<NUM>), the at least one leg (<NUM>) being deformable and having a length sufficient so as to wrap around an inferior rim of the patella (<NUM>), the at least one leg (<NUM>) including at least one fixation hole (<NUM>), characterized in that
each of the fixation nodes (<NUM>) is secured to the fixation hub (<NUM>) by a respective pair of arms (<NUM>).