Source: http://www.google.com/patents/US20020151895?dq=patent:D556760
Timestamp: 2016-05-30 11:37:55
Document Index: 207341359

Matched Legal Cases: ['arts 130', 'art 130', 'art 150', 'art 130', 'art 150', 'art 130', 'art 130', 'art 150', 'arts 130', 'arts 130', 'arts 130', 'arts 130', 'arts 130', 'art 130', 'art 150']

Patent US20020151895 - Method and device for treating scoliosis - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThis invention relates to a spinal facet cap for treating scoliosis, the facet cap comprising a shim portion for inserting into a facet joint of a spine, and an alignment portion for maintaining alignment of the shim portion within the facet joint. The invention also provides a method for treating scoliosis,...http://www.google.com/patents/US20020151895?utm_source=gb-gplus-sharePatent US20020151895 - Method and device for treating scoliosisAdvanced Patent SearchPublication numberUS20020151895 A1Publication typeApplicationApplication numberUS 10/075,373Publication dateOct 17, 2002Filing dateFeb 15, 2002Priority dateFeb 16, 2001Also published asCA2437575A1, CA2437575C, US7371238, US8070777, US20060200137, US20080287996, WO2002065954A1Publication number075373, 10075373, US 2002/0151895 A1, US 2002/151895 A1, US 20020151895 A1, US 20020151895A1, US 2002151895 A1, US 2002151895A1, US-A1-20020151895, US-A1-2002151895, US2002/0151895A1, US2002/151895A1, US20020151895 A1, US20020151895A1, US2002151895 A1, US2002151895A1InventorsDonald Soboleski, Gerald Saunders, Daniel BorschneckOriginal AssigneeSoboleski Donald A., Saunders Gerald A.B., Borschneck Daniel P.Export CitationBiBTeX, EndNote, RefManPatent Citations (4), Referenced by (228), Classifications (15), Legal Events (7) External Links: USPTO, USPTO Assignment, EspacenetMethod and device for treating scoliosis
BRIEF DESCRIPTION OF THE DRAWINGS [0017] The file of this patent contains at least one drawing executed in colour. Copies of this patent with colour drawing(s) will be provided by the Patent and Trademark Office upon request and payment of the necessary fee. [0018] The invention will be described, by way of example, with reference to the accompanying drawings, wherein: [0019] [0019]FIG. 1 shows a posterior view of a typical scoliotic spine; [0020] [0020]FIG. 2 shows a posterior view of a scoliotic spine corrected with spinal facet caps according to the invention; [0021] [0021]FIGS. 3A to 3F show further embodiments of a spinal facet cap according to the invention; [0022] [0022]FIGS. 4A to 4C show a further embodiment of a spinal facet cap according to the invention; [0023] [0023]FIG. 5 shows a further embodiment of a spinal facet cap according to the invention; [0024] [0024]FIG. 6A shows a posterior view of a scoliotic spine; [0025] [0025]FIG. 6B shows a posterior view of the scoliotic spine of FIG. 5A corrected with spinal facet caps according to the invention; and [0026] [0026]FIG. 7A shows a side view of a scoliotic spine; and [0027] [0027]FIG. 7B shows a side view of the scoliotic spine of FIG. 7A corrected with spinal facet caps according to the invention; [0028] [0028]FIG. 8A is a radiograph of a prosthetic model of a spine with scoliosis at the mid-lumbar level; [0029] [0029]FIG. 8B is a radiograph of the model of FIG. 8A, with the scoliosis corrected using spinal facet caps of the invention; [0030] [0030]FIGS. 9A and 9B show embodiments of a facet caps according to the invention; and [0031] [0031]FIGS. 10A and 10B are photographs showing the facet caps of FIGS. 9A and 9B, respectively, inserted into facet joints of a patient. DETAILED DESCRIPTION OF THE INVENTION [0032] Surgical procedures for correction of scoliosis has changed little in the last forty years. Current procedures still rely on surgical principals established in the 1960's, and involve fusion of one or more vertebrae. [0033] Selection for the level of fusion requires analysis about a plum line from the sacral spinous process superior. Vertebrae that pass outside this line identify the curve. The most superior of the inferior vertebrae, which bisect this line, is the inferior extent for fusion and the most inferior of the superior vertebrae that bisect this line is the superior extent of fusion. All levels in-between these two identified levels require fusion. [0034] After the curve is identified, all posterior ligaments and facet joints are destroyed by decortication and cartilage is removed at each level of fusion. Instrumentation for correction of the scoliosis is placed in such a manner to apply a distractive force on the concavity of the curve and compression on the convexity of the curve. All current systems rely on some vertebral fixation to a rod. Compressive and distractive forces are then applied along the rod at the points of vertebrae to rod fixation. [0035] Three forms of fixation of the posterior spine are currently available: pedicle/laminar hooks, wires and screws. Laminar hooks are placed around vertebrae lamina. Distractive hooks are placed pointing away from the apex of the curve and compressive hooks placed facing towards the apex of the curve. Pedicle screws are placed posterior to anterior in the vertebrae and can either have a distractive or compressive force applied through the rod. Laminar wires wrap around the lamina and connect to a rod at each level. The corrective force is applied as the wire tightens around a rigid rod. The lamina and thus the vertebrae are dragged to the rod. [0036] The spinal facet cap of the invention differs from the above-described standard instrumentation in a number of ways. For example, as discussed above, during standard procedures for correcting scoliosis, facet joints are generally destroyed. In contrast, the spinal facet caps of the invention require that the facet joints are substantially or entirely intact. This procedure is thus expected to preserve mobility of the facet joint. Further, rather than applying a distractive or compressive force through a rod, the facet cap effectively reshapes the facet joint. Such reshaping affords symmetry between left and right facet joints which corrects abnormal curvature. Thus, no fixation of the vertebrae is required; rather, there is modulation of the vertebral (facet) shape. This reshaping is expected to allow for the omission of fusing the intervening vertebral levels and multiple levels of vertebrae, which is the result of rod fixation, thus preserving flexibility of the spine. Also, the use of conventional instrumentation with a rod concentrates the load (i.e., weight of the torso) on the portion of the spine to which the rod is attached, as well as on the rod itself. The resulting stress sometimes results in failure of the conventional instrumentation. In contrast, in providing for the correction of individual facet joints of the spine, the facet cap of the invention maintains the natural load distribution along the spine. Accordingly, there is no load concentration at any point of the spine, and low likelihood of failure of the implanted facet cap. [0037] As used herein, the term “scoliosis” is intended to mean any abnormal curvature of the spine. Such abnormal curvature can exist in any one of all three planes, or in any combination thereof, and hence can be manifested by inappropriate lateral curvature, lordosis, kyphosis, and/or rotation. Scoliosis can be congenital or idiopathic, or induced by injury, trauma, infection, inflammation, or degenerative changes in the spine. [0038] As used herein, the term “treating scoliosis” is intended to mean correcting or reducing curvature of the spine of a subject, such that the subject experiences an improvement in condition, comfort (e.g., reduction or amelioration of pain), appearance, posture, and/or flexibility of the spine. The term “treating scoliosis” is also intended to mean preventing scoliosis from progressing to a more severe state, or inhibiting the degree to which scoliosis progresses. [0039] As used herein, the term “subject” is intended to mean any vertebrate that can have scoliosis. Typically, such subjects are primates. Preferably, the subject is human. [0040] According to one theory, many forms of scoliosis result from asymmetry between left and right facet joints of vertebrae. According to another theory, many forms of scoliosis cause asymmetry between left and right facet joints of vertebrae. While not holding to one particular theory at the exclusion of others, the present invention provides for the treatment of scoliosis by substantially or completely correcting such asymmetry. [0041] In one aspect, the invention provides a prosthetic device for treating scoliosis by substantially or completely correcting asymmetry between left and right facet joints of vertebrae. The prosthetic device, generally referred to as a spinal facet cap, is surgically implanted into a spinal facet joint at any level in the spine. Surgically implanting one or more spinal facet cap(s) is carried out with minimal or no modification of the facet joint(s) involved; thus, the invention provides for the correction of left-right asymmetry of facet joints while preserving the facet joints. In this respect the invention is unlike any known procedures for treating scoliosis, [0042] [0042]FIG. 1 shows a posterior view of a typical scoliotic spine, with asymmetry between left and right facet joints, and spinal curvature convex left. FIG. 2 shows the spine of FIG. 1 in which the asymmetry between left and right facet joints has been corrected with two spinal facet caps according to an embodiment of the present invention. As can be seen in FIG. 2, a spinal facet cap 10 according to the invention comprises a shim portion 12 which is implanted between the superior facet 22 of a first (lower) vertebra 20 and the corresponding inferior facet 32 of a second overlying vertebra 30. The shim portion has two opposed surfaces, a first (lower) surface 14 engaging the superior articular surface of the superior facet 22, and a second (upper) surface 16 engaging the inferior articular surface of the corresponding inferior facet 32. The opposed surfaces of the shim portion of the spinal facet cap can be substantially planar, as shown in FIG. 2, or they can be formed (e.g., concave or convex) to receive and at least partially complement or parallel superior and inferior facet contours. [0043] From FIG. 2 it will be appreciated that the shim portion of the spinal facet cap must be properly aligned or positioned in the facet joint, and that this alignment must be maintained. An alignment portion is provided for this purpose. The alignment portion can be provided numerous ways in accordance with the invention. For example, the alignment portion can comprise an extension or tongue 18, having an orifice 19, to accept a screw or the like which is driven into the cortex of the vertebral pedicle. The alignment portion can also comprise one or more facet hooks and/or a ridge or boss disposed along the perimeter or margin of the shim portion, to engage the superior and/or inferior facets. The alignment portion at least partially encompasses the superior and/or inferior facet(s). [0044] In some embodiments, the opposed surfaces are parallel (i.e., coplanar), such that the shim portion is of substantially uniform thickness. In other embodiments, the opposed surfaces are not coplanar, such that the shim portion is not of uniform thickness and is generally wedge-shaped. In embodiments where the opposed surfaces are not coplanar, the surfaces can be sloped along a common axis so as to form a simple angle. The angle separating the opposed surfaces can be, for example, from 0� (coplanar) to about 40�, preferably about 0� to about 20�. In other embodiments, the slopes of the opposed surfaces form a compound angle in which the slopes are not aligned on a common axis. It will be appreciated that the direction of slope is appropriately chosen to correct a facet joint for a given abnormality of curvature (e.g., kyphosis, lordosis, etc.). [0045] It will be appreciated that a spinal facet cap according to the invention can be produced in a range of sizes and shapes by varying the thickness of the shim portion (i.e., distance between the opposed surfaces), the angle of the shim portion (i.e., angle between the opposed surfaces), the area of the shim portion (i.e., surface area of the opposed surfaces), and the shape of the shim portion and/or opposed surfaces so as to provide any desired amount of correction to a facet joint, and to accommodate any size of facet joint. Further, a facet cap according to the invention can be symmetrical or asymmetrical with respect to the angle, area, and shape of opposed surfaces. [0046] Each opposed face of the shim portion is sized to accommodate the generally circular or oblong (i.e., oval) shape of the articulating surface of a facet joint into which the facet cap is inserted. The size or area of the opposed faces of a facet cap will depend on factors such as where in the spine the facet cap is implanted (e.g., cervical being smaller than lumbar), the age and size of the subject, and the condition of the facet joint. The size of the opposed faces is generally described herein as circular, having a diameter; however, it is to be understood that the opposed faces can be of any shape and the diameter refers to that portion of an opposed surface that substantially corresponds to an articular surface of a facet joint. The diameter of each opposed face of the shim portion ranges from about 5 mm to about 30 mm, preferably from about 10 mm to about 20 mm, still more preferably from about 12 mm to about 18 mm. [0047] It will be appreciated that patients receiving facet caps can vary in age/size, and in degree of severity of scoliosis. Thus, the present invention contemplates a range of sizes and shapes of facet caps, to suit any facet joint in need of treatment, so as to correct any or all of a reduction in height, an abnormality in tilt, and an abnormality in angulation (e.g., kyphosis, lordosis) of the inferior or superior vertebral body. The facet caps can be provided ready for implanting (e.g., sterilized and appropriately packaged), or they can be sterilized prior to implanting using methods well-known in the art. [0048] A spinal facet cap according to the invention can be made of any suitable biologically inert material. Examples of suitable materials are cobalt chrome, stainless steel, and titanium. Cobalt chrome is preferred owing to its biocompatibility with tissues and cartilage. [0049] Several embodiments of the spinal facet cap of the present invention are shown in FIG. 3. For example, FIG. 3A shows a spinal facet cap like that shown in FIG. 2. In FIG. 3B, the shim portion 50 has an alignment portion comprising a ridge 54 disposed along the edge of and partially surrounding the surface 56 that engages the inferior facet, toward the tongue 52. As shown in FIGS. 3C and 3D, in which FIG. 3D shows a longitudinal section of the embodiment of FIG. 3C, the shim portion 60 similarly has an alignment portion comprising a ridge 68 on the edge of the surface 67 that engages the superior facet, opposite the tongue 62. The embodiment of FIGS. 3C and 3D also has a further ridge 64 on the edge of the surface 66 that engages the inferior facet, toward the tongue 62. It will be appreciated that the provision of an alignment portion comprising ridges on the first, second, or both surfaces of the facet cap helps to maintain alignment of the facet cap with the superior and inferior facets, and helps to keep the facet cap registered in the facet joint. [0050] The alignment portion of a spinal facet cap according to the invention can also comprise one or more pins extending outwardly from at least one of the two opposed surfaces. For example, the spinal facet cap 70 shown in FIG. 3E has pins 72, 74 extending outwardly from the opposed surfaces 73, 75, respectively. The pins 72, 74 engage holes prepared in the articular surfaces of the superior and inferior facets during the implant procedure. [0051] In FIG. 3F there is shown another embodiment of a spinal facet cap according to the invention in which the shim portion 80 has an alignment portion comprising a facet hook 88 on the edge of the surface 87 that engages the superior facet, substantially opposite the tongue 82, and another facet hook 84 on the edge of the surface 86 that engages the inferior facet, toward the tongue 82. In further embodiments, only one of either facet hook 84 or facet hook 88 is present. The facet hook can vary in the extent of the curvature of the hook and thus the extent to which the hook encompasses the inferior/superior facet. For example, in some embodiments the curvature of the facet hook can be reduced so that the hook extends from the shim portion in a 90� arc, whereas in other embodiments the hook extends from the shim portion in a 180� arc. [0052] Although not shown in the drawings, it will be appreciated that embodiments of the invention such as those shown in FIGS. 3A to 3D and 3F can be provided with an orifice passing through the shim portion, for accepting a pin, screw, or the like driven through at least one of the inferior and superior facets, to thereby contribute to maintaining alignment of the spinal facet cap. In particular, in the embodiment of FIG. 3F, each of the facet hook 84, shim portion 80, and facet hook 88 can be provided with an orifice, the three orifices having a common longitudinal axis, so as to accommodate a pin or screw disposed through the facet hook 84, the inferior facet, the shim portion 80, the superior facet, and the facet hook 88. Also not shown in the figures are embodiments in which the shim portion is sloped in the opposite direction to that shown (i.e., a directive relative to the tongue 18 in FIG. 3A). [0053] In the embodiment shown in FIGS. 4A to 4C, which is similar to that of FIG. 3F, the spinal facet cap 90 has a shim portion 92 with opposed surfaces 94, 96 provided with an alignment portion comprising facet hooks 95, 97, respectively, and a tongue 98. Tongue 98 extends outwardly from the shim portion 92, and has an orifice 99 for accepting a screw. Facet hook 95 engages the inferior facet, and facet hook 97 engages the superior facet. This can be seen in FIG. 6, which shows a scoliotic spine (FIG. 6A) in which the decrease in height and lateral tilt of the spine have been corrected with spinal facet caps according to the present embodiment (FIG. 6B). A handle 100 is optionally provided to facilitate implanting the facet cap. The handle 100 is attached to the facet cap in a manner to allow it to be removed upon implanting the cap. For example, the handle 100 can be crimped at the junction with the facet cap, so that it can simply be broken off once the facet cap is implanted. [0054] It will be appreciated that the embodiment shown in FIG. 4 can be provided with only a single facet hook, in which case it is preferable that the facet hook 95 that engages the inferior facet is provided. However, the provision of two facet hooks 95 and 97 improves the stability of the implant. Also, the facet hooks can be wider or narrower than those shown in FIG. 4. A wider facet hook has the advantage of contacting more of the facet, and hence is preferable. When a very wide facet hook is provided, it can be curved so as to approximate the shape of the portion of the facet that it contacts, and hence contact a greater portion of the facet. As an alternative to a wide facet hook, a facet hook can comprise two or more fingers, the fingers providing multiple points of contact with a facet. An advantage of such fingers is that growth of tissue around and between the fingers is possible, and such growth improves the stability and reliability of the implant. [0055] In a further embodiment, the distance between facet hooks, and/or the angle of the shim portion (i.e., the extent to which the shim portion is wedge-shaped) can be adjusted. An example of this embodiment is shown in FIG. 5. FIG. 5A shows this embodiment, denoted by reference numeral 120, in side and plan views, which comprises two parts 130 and 150. FIG. 5B shows part 130 in side and plan views, and FIG. 5C shows part 150 in side and plan views. Part 130 comprises a plate 134, an inferior facet hook 132 disposed on a first surface of the plate 134, and a tongue 140 and two rows of teeth 138 disposed on the opposite surface of the plate 134. An orifice 136 accomodates a cortical screw (not shown) Part 150 comprises a plate 154, a superior facet hook 152 disposed on a first surface of the plate 154, and two rows of teeth 158 disposed on the opposite surface of the plate 154. A longitudinal opening 156 is provided in the plate 154, for accepting the tongue 140 of part 130 in a sliding fit. As can be seen from FIG. 5A. part 130 mates with part 150 such that tongue 140 fits in opening 156 and teeth 138 mesh with teeth 158, and the inferior and superior facet hooks 132 and 152 are opposed. When mated, plates 134 and 154 comprise the shim portion. Preferably, the teeth comprising each set of teeth 138 and 158 are asymmetrical, such that meshing of the two sets of teeth forms a rachet that allows parts 130 and 150 to slide relative to each other in one direction, but not the other. Preferably, such rachet allows parts 130 and 150 to slide in a direction which brings the inferior and superior facet hooks closer together, and prevents the facet hooks from sliding farther apart. Thus, to use this embodiment to correct a facet joint, parts 130 and 150 are first mated such that the facet hooks are farthest apart, and the so-assembled facet cap is inserted into a facet joint of a patient. The distance between the facet hooks is then reduced by sliding parts 130 and 150 together, to fit the facet joint being corrected and to provide the desired amount of correction. In variations of this embodiment, either or both of plates 134 and 154 can be wedge-shaped, so that as parts 130 and 150 slide relative to each other, the amount of shim provided to a facet joint can be adjusted. Further, such wedge-shape of part 130 and/or part 150 can be tapered in any direction relative to the facet hook, so as to provide correction for any type of facet joint asymmetry (e.g., lordosis, kyphosis, etc.). It will be appreciated that the facet hooks in this embodiment could be substituted for ridges, bosses, etc, as discussed in respect of the alignment portion of the above embodiments. [0056] [0056]FIG. 7A shows a side view of a scoliotic spine with pronounced lordosis. In FIG. 7B, the scoliosis shown in FIG. 7A has been corrected by inserting spinal facet caps 90 between facet joints. Here, spinal facet caps according to the embodiment shown in FIG. 3F or FIG. 4 are employed. [0057] In another aspect, the invention provides a method for treating scoliosis by surgically implanting at least one spinal facet cap into at least one spinal facet joint, such that asymmetry between left and right facet joints of vertebrae is substantially or completely corrected. [0058] Treating a subject exhibiting mild scoliosis might involve implanting only a single facet cap. Treating more severe scoliosis might involve implanting two or more spinal facet caps at various locations in the spine to achieve the desired correction. In such severe cases, spinal facet caps of various sizes and shapes are expected to be employed. As mentioned above, the invention provides for treating scoliosis while preserving facet joints. However, in some cases, some minor modification (e.g., providing a hole for a pin) or more extensive modification (e.g., removal of bone) of either or both of the inferior and superior facets might be necessary or desirable to ensure proper seating and alignment of a spinal facet cap, and hence improve the subject's prognosis. Treating a subject with scoliosis involves evaluating the subject prior to surgery and during surgery for the number, size, shape, location, and placement of spinal facet caps to achieve the desired correction. An imaging system (e.g., computed tomography (CT), radiography, or magnetic resonance imaging (MRI)) can advantageously be used to evaluate the subject prior to surgery, to help determine the number, size, shape, location, and placement of spinal facet caps to achieve the desired correction. Further, data obtained from such evaluation of a subject prior to surgery can be used to prepare a custom suite of facet caps of, for example, various sizes and shapes, to suit a particular subject. WORKING EXAMPLES Example 1 Cadaveric Implantation [0059] A spinal facet cap based on the embodiment shown in FIGS. 2 and 3A, having a diameter of about 12 mm, was surgically implanted into the scoliotic spine of a cadaver (female, elderly) at the Department of Anatomy and Cell Biology at Queen's University, Kingston, Ontario, Canada, to evaluate the ease or difficulty of placement and the seating of the facet cap in the facet joint. There were no complications in implanting the facet cap into the spine, suggesting that use of the facet cap for treating scoliosis could become a routine surgical procedure. Moreover, during this exercise it was found that seating of the facet cap in the facet joint was fully satisfactory. This exercise therefore provides a strong indication that the spinal facet cap of the invention will be effective in the treatment of scoliosis. Example 2 Prosthetic Model [0060] Osteotomies were performed on the mid-lumbar facets of a prosthetic model of an adult human spine to create a scoliotic model. This is shown in the radiograph of FIG. 8A, where reference numeral 200 refers to pins used to hold the model together. Spinal facet caps like that shown in FIG. 3F were then inserted into the mid-lumbar facet joints, which substantially corrected the scoliotic curvature of the spine. This can be seen in the radiograph of FIG. 8B, where reference numeral 210 refers to the facet caps. Example 3 Formulation of in vivo Placement [0061] The success of cadaveric implantation led to the formulation of tempo in vivo application. During the course of standard scoliosis surgery, all facet joints from the superior to inferior aspect of the proposed fusion levels are stripped of the joint capsule, the cartilage removed, and the joint decorticated. Prior to destruction of the joints an in vivo model for facet cap placement is present, as no further dissection of the spine is necessary, in which the facet caps can be placed and removed in minutes. This has allowed the formulation of a working model for application of the facet caps. Thus, the below examples relate to the temporary insertion of facet caps during the course of standard corrective surgery, to establish an operative technique for their insertion, and to evaluate their efficacy and ease of use. Example 4 Operative Technique [0062] Pre-Operative [0063] Pre-operative planning is based on the standard standing radiograph of the spine. The most accessible inferior vertebral body demonstrating tilting relative to pelvis is identified. The inferior tilting of the vertebra is measured to determine the appropriate thickness of the shim portion and distance between facet hooks of the facet cap. The next superior adjacent facet may also be targeted as a sight for correction. More superiously in the spine the apex of the scoliotic curve is identified. A measurement of the interior tilt of this vertebra is obtained along the concave aspect of the scoliotic curvature. A facet cap having a shim of appropriate thickness and distance between facet hooks is placed at this level and the next superior adjacent facet may also be targeted. [0064] Operative Technique [0065] The patient is placed prone, supported by bolsters over ASIS and upper chest with care to keep pressure off the abdomen. After preparing the skin the back is draped to expose the midline of the back. [0066] A midline incision is made over the spinous processes over the appropriate levels (see preoperative planning). The linea between the left and right paravertebral muscles is dissected down to the spinous processes. Localization of the vertebral levels is checked by AP radiograph. The paravertebral muscles are then reflected laterally along the lamina to the facet joints. Care is taken to maintain the integrity of the facet ligaments. Further soft tissue dissection is then performed to expose the transverse processes. [0067] The facet joint, which is to receive the facet cap, is then stripped of the joint capsule and posterior pericapsular ligament. Care is taken to leave the facet cartilage intact. The contra lateral facet joint is then stripped of ligament and capsule. The facet joint cartilage on the contra lateral facet joint is excised to bleeding subchondral bone. A laminar spreader is placed between the superior and inferior transverse processes on the side of the spine to receive the facet cap. The laminar spreader is distracted to open the space in the ipslateral facet joint. The facet cap is then placed in the facet joint and laminar spreader removed. Correct placement of the facet cap should allow for maintenance of the distraction created by the laminar spreader. The bone is then decorticated, autologus bone graft placed along both sides of the transverse processes, facet and lamina. AP and lateral radiographs are taken to assess position and affect of the facet cap. The paravertebral muscle is then approximated and skin closed. Example 5 [0068] Male patient 16 years old with 70 degree thoracic curve and 95 degree neuromuscular kypho-scoliosis (Kingston, Ontario, Canada). The pre-operative plan for facet cap placement was to assess the possibility of seating a facet cap like that of FIG. 3F in the lumbar facet joint between the L1 and L2 lumbar vertebrae. [0069] The posterior spine was prepared in the standard fashion, described above. After the L1-L2 lumbar vertebrae facet was stripped of the capsule the joint was inspected. No space was available to open the facet joint so that the facet cap could be inserted. However, it is expected that could the facet joint have been opened, the facet position could be altered to allow the facet cap to be seated. Example 6 [0070] Female patient 14 years old with 54 degree King II idiopathic scoliosis (Kingston, Ontario, Canada). The pre-operative plan was for facet cap placement in the L1-L2 lumbar facet joint, and the T6-T7 thoracic facet joint. The use of laminar spreader distraction between the facet joint aided in facet joint alignment, as did the addition of a small metal dissector into the joint for space creation and facet cap placement. [0071] The posterior spine was prepared in the standard fashion as described above. After the L1-L2 lumbar vertebrae facet was stripped of the capsule, a blunt osteotome was placed in the inferior joint and wedged the joint open. Concurrently a laminar spreader was placed between L1 and L2 and distracted. These two manoeuvres opened the facet joint and subjectively corrected the scoliosis in this segment. However, the facet cap like that of FIG. 3B could not be inserted because it was the wrong size for this patient. In particular, the facet hook pattern (radius) of the superior and inferior facet hooks of the facet cap was too narrow and the overall length of the facet cap too long. It is expected that changing the radius of the facet hooks to a range of about 5 mm to about 1 cm, and the overall length of the facet cap to a range of about 1.5 cm to about 2.5 cm would have been appropriate. The thoracic facet was addressed, and it was found that the superior facet hook obscured implantation of the facet cap in this patient and the facet cap could not be inserted. It is expected that rotation of the inferior facet hook by about 30 degrees from parallel to the facet cap to the right, for right insertion, and to the left for left insertion, would have facilitated implantation of the facet cap in this patient. Example 7 [0072] Female patient 16 years old with 45 degree thoracic curve and 95 degree kyphosis neuromuscular kypho-scoliosis (Kingston, Ontario, Canada). The pre-operative plan was to place modified facet caps (FIGS. 9A and 9B) into the L2-L3 lumbar facet joint and T7-T8 thoracic facet joint. [0073] The posterior spine was prepared in the standard fashion, described above. Using the technique described above the L2-L3 facet joint was opened and a facet cap like that shown in FIG. 9B was inserted. This is shown in FIG. 10B, where reference numeral 400 refers to the facet cap, with superior facet hook 410 and inferior facet hook 420 partially visible. Also shown in FIG. 10B are several Moss� Miami (DePuy-AcroMed Inc.) laminar hooks 430 placed around vertebral laminae, for use with rods for the standard corrective procedure. The facet cap subjectively corrected the scoliosis at this level. The T7-T8 facet joint was prepared and a facet cap like that shown in FIG. 9A was inserted, as shown in FIG. 10A where reference numeral 300 denotes the facet cap. The inferior facet hook 320 can be seen clearly. Also visible are several Moss� Miami (DePuy-AcroMed Inc.) laminar hooks 330 placed around vertebral laminae, for use with rods for the standard corrective procedure. The facet cap subjectively corrected the scoliosis at this level. Dimensions of the facet caps used in this example are provided in the below table. TABLE 1 Dimensions of facet caps used in Example 7 and shown in FIGS. 9A and 9B. Width of both facet caps was about 12.7 mm. Dimension mm a 2.0 b 1.5 c 25.0 d 28.0 e 14.7 f 8.7 g 8.4 h 0 r 3.2 [0074] Equivalents [0075] Variants to the embodiments described above will be apparent to those skilled in the art. Such variants are within the scope of the present invention and are covered by the below claims. Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6565605 *Dec 13, 2000May 20, 2003Medicinelodge, Inc.Multiple facet joint replacementUS6579319 *Nov 29, 2000Jun 17, 2003Medicinelodge, Inc.Facet joint replacementUS6610091 *Oct 20, 2000Aug 26, 2003Archus Orthopedics Inc.Facet arthroplasty devices and methodsUSRE36758 *Jan 30, 1998Jun 27, 2000Fitz; William R.Artificial facet joint* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6949123Sep 9, 2003Sep 27, 2005Archus Orthopedics Inc.Facet arthroplasty devices and methodsUS6974478May 30, 2002Dec 13, 2005Archus Orthopedics, Inc.Prostheses, systems and methods for replacement of natural facet joints with artificial facet joint surfacesUS7051451Apr 22, 2004May 30, 2006Archus Orthopedics, Inc.Facet joint prosthesis measurement and implant toolsUS7465304Apr 14, 2003Dec 16, 2008Spine Design, Inc.Anterior cervical facet discectomy surgery kit and method for its useUS7517358 *Jul 8, 2005Apr 14, 2009Orthopedic Development CorporationImplant device used in minimally invasive facet joint hemi-arthroplastyUS7550010Jan 7, 2005Jun 23, 2009Warsaw Orthopedic, Inc.Spinal arthroplasty device and methodUS7556651Jul 7, 2009Warsaw Orthopedic, Inc.Posterior spinal device and methodUS7648523 *Jan 19, 2010Interventional Spine, Inc.Method and apparatus for spinal stabilizationUS7674293Mar 9, 2010Facet Solutions, Inc.Crossbar spinal prosthesis having a modular design and related implantation methodsUS7691145Oct 25, 2004Apr 6, 2010Facet Solutions, Inc.Prostheses, systems and methods for replacement of natural facet joints with artificial facet joint surfacesUS7695513Apr 13, 2010Kyphon SarlDistractible interspinous process implant and method of implantationUS7699878 *May 10, 2005Apr 20, 2010Synthes Usa, LlcMethod for locking an artificial facet between two vertebral bodiesUS7708761 *Sep 22, 2005May 4, 2010Minsurg International, Inc.Spinal plug for a minimally invasive facet joint fusion systemUS7722647Mar 14, 2005May 25, 2010Facet Solutions, Inc.Apparatus and method for posterior vertebral stabilizationUS7749252Mar 17, 2006Jul 6, 2010Kyphon SarlInterspinous process implant having deployable wing and method of implantationUS7753937Jun 2, 2004Jul 13, 2010Facet Solutions Inc.Linked bilateral spinal facet implants and methods of useUS7758619Jul 20, 2010Kyphon S�RLSpinous process implant with tethersUS7763050Jul 27, 2010Warsaw Orthopedic, Inc.Inter-cervical facet implant with locking screw and methodUS7771479Aug 10, 2010Warsaw Orthopedic, Inc.Dual articulating spinal device and methodUS7776090Aug 17, 2010Warsaw Orthopedic, Inc.Inter-cervical facet implant and methodUS7803190Nov 9, 2006Sep 28, 2010Kyphon S�RLInterspinous process apparatus and method with a selectably expandable spacerUS7811326Oct 12, 2010Warsaw Orthopedic Inc.Posterior joint replacement deviceUS7815648Sep 29, 2008Oct 19, 2010Facet Solutions, IncSurgical measurement systems and methodsUS7824429Jul 18, 2003Nov 2, 2010Interventional Spine, Inc.Method and apparatus for spinal fixationUS7828822Apr 27, 2006Nov 9, 2010Kyphon S�RLSpinous process implantUS7833246Oct 14, 2003Nov 16, 2010Kyphon S�RLInterspinous process and sacrum implant and methodUS7846183Dec 7, 2010Spinal Elements, Inc.Vertebral facet joint prosthesis and method of fixationUS7846184Dec 7, 2010Sasso Ricardo CReplacement facet joint and methodUS7857832Jul 20, 2005Dec 28, 2010Interventional Spine, Inc.Method and apparatus for spinal stabilizationUS7875077Jan 25, 2011Warsaw Orthopedic, Inc.Support structure device and methodUS7901438Dec 8, 2005Mar 8, 2011Interventional Spine, Inc.Method and apparatus for spinal stabilizationUS7901459Mar 8, 2011Warsaw Orthopedic, Inc.Split spinal device and methodUS7909853Mar 22, 2011Kyphon SarlInterspinous process implant including a binder and method of implantationUS7909857Mar 22, 2011Warsaw Orthopedic, Inc.Devices and methods for correcting spinal deformitiesUS7914556Dec 20, 2006Mar 29, 2011Gmedelaware 2 LlcArthroplasty revision system and methodUS7914560Mar 29, 2011Gmedelaware 2 LlcSpinal facet implant with spherical implant apposition surface and bone bed and methods of useUS7918877Apr 5, 2011Kyphon SarlLateral insertion method for spinous process spacer with deployable memberUS7922766Mar 9, 2007Apr 12, 2011Gerraspine A.G.Method for resurfacing a cervical articular facetUS7931674Mar 17, 2006Apr 26, 2011Kyphon SarlInterspinous process implant having deployable wing and method of implantationUS7935134Jun 29, 2006May 3, 2011Exactech, Inc.Systems and methods for stabilization of bone structuresUS7955356Jun 7, 2011Kyphon SarlLaterally insertable interspinous process implantUS7955390Jun 7, 2011GME Delaware 2 LLCMethod and apparatus for spine joint replacementUS7959652Jun 14, 2011Kyphon SarlInterspinous process implant having deployable wings and method of implantationUS7988712Aug 2, 2011Gerraspine A.G.Method for resurfacing a lumbar articular facetUS7993366Oct 25, 2004Aug 9, 2011Cardiva Medical, Inc.Self-tensioning vascular occlusion device and method for its useUS7993373Aug 9, 2011Hoy Robert WPolyaxial orthopedic fastening apparatusUS7993377Jan 15, 2007Aug 9, 2011Interventional Spine, Inc.Method and apparatus for spinal fixationUS7998172Apr 16, 2009Aug 16, 2011Spinal Elements, Inc.Vertebral facet joint prosthesis and method of fixationUS7998175Aug 16, 2011The Board Of Trustees Of The Leland Stanford Junior UniversitySystems and methods for posterior dynamic stabilization of the spineUS7998176Aug 16, 2011Interventional Spine, Inc.Method and apparatus for spinal stabilizationUS7998177Sep 29, 2008Aug 16, 2011Gmedelaware 2 LlcLinked bilateral spinal facet implants and methods of useUS7998178Sep 29, 2008Aug 16, 2011Gmedelaware 2 LlcLinked bilateral spinal facet implants and methods of useUS8012209Sep 6, 2011Kyphon SarlInterspinous process implant including a binder, binder aligner and method of implantationUS8025680Sep 27, 2011Exactech, Inc.Systems and methods for posterior dynamic stabilization of the spineUS8029540 *Oct 4, 2011Kyphon SarlInter-cervical facet implant with implantation toolUS8043334Oct 25, 2011Depuy Spine, Inc.Articulating facet fusion screwUS8048117Sep 23, 2005Nov 1, 2011Kyphon SarlInterspinous process implant and method of implantationUS8062336Dec 19, 2005Nov 22, 2011Gmedelaware 2 LlcPolyaxial orthopedic fastening apparatus with independent locking modesUS8066740Oct 21, 2005Nov 29, 2011Gmedelaware 2 LlcFacet joint prosthesesUS8066749Dec 14, 2005Nov 29, 2011Warsaw Orthopedic, Inc.Implant for stabilizing a bone graft during spinal fusionUS8066771Nov 29, 2011Gmedelaware 2 LlcFacet arthroplasty devices and methodsUS8070777Dec 6, 2011Queen's University At KingstonMethod and device for treating abnormal curvature of a spineUS8070778Mar 17, 2006Dec 6, 2011Kyphon SarlInterspinous process implant with slide-in distraction piece and method of implantationUS8070811Dec 6, 2011Gmedelaware 2 LlcFacet arthroplasty devices and methodsUS8075595Dec 13, 2011The Board Of Trustees Of The Leland Stanford Junior UniversitySystems and methods for posterior dynamic stabilization of the spineUS8075596Dec 13, 2011Warsaw Orthopedic, Inc.Spinal prosthesis systemsUS8092532Jan 10, 2012Gmedelaware 2 LlcFacet arthroplasty devices and methodsUS8096996Jan 17, 2012Exactech, Inc.Rod reducerUS8100944Jan 24, 2012Kyphon SarlInter-cervical facet implant and method for preserving the tissues surrounding the facet jointUS8109977Feb 7, 2012Interventional Spine, Inc.Method and apparatus for spinal fixationUS8118838Jun 6, 2006Feb 21, 2012Kyphon SarlInter-cervical facet implant with multiple direction articulation joint and method for implantingUS8128660Dec 14, 2005Mar 6, 2012Kyphon SarlInter-cervical facet joint implant with locking screw systemUS8133261Aug 22, 2007Mar 13, 2012Depuy Spine, Inc.Intra-facet fixation device and method of useUS8147524Apr 20, 2006Apr 3, 2012Warsaw Orthopedic, Inc.Instrumentation and methods for reducing spinal deformitiesUS8162985Oct 20, 2004Apr 24, 2012The Board Of Trustees Of The Leland Stanford Junior UniversitySystems and methods for posterior dynamic stabilization of the spineUS8163017Apr 24, 2012Gmedelaware 2 LlcFacet arthroplasty devices and methodsUS8172877May 8, 2012Kyphon SarlInter-cervical facet implant with surface enhancementsUS8187303Apr 22, 2004May 29, 2012Gmedelaware 2 LlcAnti-rotation fixation element for spinal prosthesesUS8197513Jun 12, 2012Depuy Spine, Inc.Facet fixation and fusion wedge and method of useUS8206418Jun 26, 2012Gmedelaware 2 LlcSystem and method for facet joint replacement with detachable couplerUS8211147Jul 3, 2012Gmedelaware 2 LlcSystem and method for facet joint replacementUS8216276Jul 29, 2009Jul 10, 2012Warsaw Orthopedic, Inc.Interspinous spacerUS8221461Oct 24, 2005Jul 17, 2012Gmedelaware 2 LlcCrossbar spinal prosthesis having a modular design and systems for treating spinal pathologiesUS8226690Feb 23, 2006Jul 24, 2012The Board Of Trustees Of The Leland Stanford Junior UniversitySystems and methods for stabilization of bone structuresUS8231655Jul 28, 2006Jul 31, 2012Gmedelaware 2 LlcProstheses and methods for replacement of natural facet joints with artificial facet joint surfacesUS8252027Aug 28, 2012Gmedelaware 2 LlcSystem and method for facet joint replacementUS8267969Sep 18, 2012Exactech, Inc.Screw systems and methods for use in stabilization of bone structuresUS8308768Aug 29, 2008Nov 13, 2012Gmedelaware 2 LlcSystem and method for facet joint replacementUS8313511Nov 20, 2012Gmedelaware 2 LlcFacet joint replacementUS8317836Nov 27, 2012Spartek Medical, Inc.Bone anchor for receiving a rod for stabilization and motion preservation spinal implantation system and methodUS8317839Mar 3, 2010Nov 27, 2012Synthes Usa, LlcMethod for locking an artificial facet between two vertebral bodiesUS8333789Apr 17, 2008Dec 18, 2012Gmedelaware 2 LlcFacet joint replacementUS8343189Jan 1, 2013Zyga Technology, Inc.Method and apparatus for facet joint stabilizationUS8353933Apr 17, 2008Jan 15, 2013Gmedelaware 2 LlcFacet joint replacementUS8372150Aug 2, 2010Feb 12, 2013Warsaw Orthpedic, Inc.Spinal device and methodUS8394125Mar 12, 2013Zyga Technology, Inc.Systems and methods for facet joint treatmentUS8394127Jun 27, 2012Mar 12, 2013Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rodUS8398681Aug 17, 2005Mar 19, 2013Gmedelaware 2 LlcAdjacent level facet arthroplasty devices, spine stabilization systems, and methodsUS8409254 *Jun 27, 2008Apr 2, 2013Gmedelaware 2 LlcProstheses, tools and methods for replacement of natural facet joints with artificial facet joint surfacesUS8409257Apr 2, 2013Warsaw Othopedic, Inc.Systems and methods for facet joint stabilizationUS8419770Jun 2, 2004Apr 16, 2013Gmedelaware 2 LlcSpinal facet implants with mating articulating bearing surface and methods of useUS8425557Apr 23, 2013Gmedelaware 2 LlcCrossbar spinal prosthesis having a modular design and related implantation methodsUS8430916Apr 30, 2013Spartek Medical, Inc.Spinal rod connectors, methods of use, and spinal prosthesis incorporating spinal rod connectorsUS8491635Nov 30, 2007Jul 23, 2013Gmedelaware 2 LlcCrossbar spinal prosthesis having a modular design and related implantation methodsUS8496686May 7, 2007Jul 30, 2013Gmedelaware 2 LlcMinimally invasive spine restoration systems, devices, methods and kitsUS8496687Dec 14, 2007Jul 30, 2013Gmedelaware 2 LlcCrossbar spinal prosthesis having a modular design and related implantation methodsUS8523865Jan 16, 2009Sep 3, 2013Exactech, Inc.Tissue splitterUS8523907Jan 3, 2006Sep 3, 2013Gmedelaware 2 LlcProstheses, tools and methods for replacement of natural facet joints with artificial facet joint surfacesUS8551142Dec 13, 2010Oct 8, 2013Exactech, Inc.Methods for stabilization of bone structuresUS8562649Aug 9, 2006Oct 22, 2013Gmedelaware 2 LlcSystem and method for multiple level facet joint arthroplasty and fusionUS8568451Nov 10, 2009Oct 29, 2013Spartek Medical, Inc.Bone anchor for receiving a rod for stabilization and motion preservation spinal implantation system and methodUS8579941Apr 12, 2007Nov 12, 2013Alan ChervitzLinked bilateral spinal facet implants and methods of useUS8608779Jun 12, 2008Dec 17, 2013Ricardo C. SassoReplacement facet joint and methodUS8652137Feb 21, 2008Feb 18, 2014Spinal Elements, Inc.Vertebral facet joint drill and method of useUS8663293Apr 11, 2011Mar 4, 2014Zyga Technology, Inc.Systems and methods for facet joint treatmentUS8668722 *Nov 13, 2012Mar 11, 2014DePuy Synthes Products, LLCMethod for locking an artificial facet between two vertebral bodiesUS8675930Aug 5, 2008Mar 18, 2014Gmedelaware 2 LlcImplantable orthopedic device component selection instrument and methodsUS8696707Mar 7, 2006Apr 15, 2014Zyga Technology, Inc.Facet joint stabilizationUS8702755Aug 10, 2007Apr 22, 2014Gmedelaware 2 LlcAngled washer polyaxial connection for dynamic spine prosthesisUS8702759Aug 29, 2008Apr 22, 2014Gmedelaware 2 LlcSystem and method for bone anchorageUS8740942Jan 23, 2013Jun 3, 2014Spinal Elements, Inc.Vertebral facet joint prosthesis and method of fixationUS8740949Feb 24, 2011Jun 3, 2014Spinal Elements, Inc.Methods and apparatus for stabilizing boneUS8764801Feb 7, 2006Jul 1, 2014Gmedelaware 2 LlcFacet joint implant crosslinking apparatus and methodUS8777994Sep 29, 2008Jul 15, 2014Gmedelaware 2 LlcSystem and method for multiple level facet joint arthroplasty and fusionUS8858597Dec 3, 2010Oct 14, 2014Spinal Elements, Inc.Vertebral facet joint prosthesis and method of fixationUS8864832Aug 16, 2007Oct 21, 2014Hh Spinal LlcPosterior total joint replacementUS8882804 *May 6, 2013Nov 11, 2014Spinal Elements, Inc.Vertebral facet joint prosthesis and method of fixationUS8888852Jun 15, 2009Nov 18, 2014Hh Spinal LlcSpinal athroplasty device and methodUS8894685Apr 13, 2007Nov 25, 2014DePuy Synthes Products, LLCFacet fixation and fusion screw and washer assembly and method of useUS8900273Jan 10, 2008Dec 2, 2014Gmedelaware 2 LlcTaper-locking fixation systemUS8906063 *Sep 29, 2008Dec 9, 2014Gmedelaware 2 LlcSpinal facet joint implantUS8926700Jun 2, 2004Jan 6, 2015Gmedelware 2 LLCSpinal facet joint implantUS8945190Dec 22, 2011Feb 3, 2015Interventional Spine, Inc.Method and apparatus for spinal fixationUS8992533Aug 18, 2010Mar 31, 2015Spinal Elements, Inc.Vertebral facet joint drill and method of useUS8992536Jun 24, 2011Mar 31, 2015Warsaw Orthopedic, Inc.Coplanar deformity correction systemUS8998905Apr 29, 2011Apr 7, 2015Warsaw Orthopedic, Inc.Methods and instruments for use in vertebral treatmentUS8998953Aug 30, 2011Apr 7, 2015Spinal Elements, Inc.Vertebral facet joint prosthesis and method of fixationUS9011498Feb 1, 2011Apr 21, 2015Warsaw Orthopedic, Inc.Devices and methods for correcting spinal deformitiesUS9017388Sep 14, 2006Apr 28, 2015Warsaw Orthopedic, Inc.Methods for correcting spinal deformitiesUS9017389Mar 11, 2013Apr 28, 2015Zyga Technology, Inc.Methods for facet joint treatmentUS9044277Jul 12, 2010Jun 2, 2015DePuy Synthes Products, Inc.Pedicular facet fusion screw with plateUS9050144Aug 29, 2008Jun 9, 2015Gmedelaware 2 LlcSystem and method for implant anchorage with anti-rotation featuresUS9056016Mar 28, 2008Jun 16, 2015Gmedelaware 2 LlcPolyaxial adjustment of facet joint prosthesesUS9060787Aug 14, 2012Jun 23, 2015Spinal Elements, Inc.Method of using a vertebral facet joint drillUS9089372Jul 12, 2010Jul 28, 2015DePuy Synthes Products, Inc.Pedicular facet fusion screw with plateUS9179943Apr 18, 2014Nov 10, 2015Spinal Elements, Inc.Methods and apparatus for stabilizing boneUS9198766Feb 7, 2008Dec 1, 2015Gmedelaware 2 LlcProstheses, tools, and methods for replacement of natural facet joints with artificial facet joint surfacesUS9233006Nov 15, 2012Jan 12, 2016Zyga Technology, Inc.Systems and methods for facet joint treatmentUS9254137 *Aug 29, 2003Feb 9, 2016Lanterna Medical Technologies LtdFacet implantUS9271765Feb 23, 2012Mar 1, 2016Spinal Elements, Inc.Vertebral facet joint fusion implant and method for fusionUS9289243May 23, 2014Mar 22, 2016Warsaw Orthopedic, Inc.Methods for correcting spinal deformitiesUS9301786Aug 16, 2011Apr 5, 2016Spinal Elements, Inc.Methods and apparatus for stabilizing boneUS9314277Aug 21, 2013Apr 19, 2016Zyga Technology, Inc.Systems and methods for facet joint treatmentUS20030028250 *May 30, 2002Feb 6, 2003Archus Orthopedics, Inc.Prostheses, systems and methods for replacement of natural facet joints with artifical facet joint surfacesUS20040049272 *Sep 9, 2003Mar 11, 2004Archus Orthopedics, Inc.Facet arthroplasty devices and methodsUS20040049275 *Sep 9, 2003Mar 11, 2004Archus Orthopedics, Inc.Facet arthroplasty devices and methodsUS20040111154 *Sep 9, 2003Jun 10, 2004Archus Orthopedics, Inc.Facet arthroplasty devices and methodsUS20050010291 *Jul 8, 2003Jan 13, 2005Archus Orthopedics Inc.Prostheses, tools and methods for replacement of natural facet joints with artificial facet joint surfacesUS20050049705 *Aug 29, 2003Mar 3, 2005Hale Horace WinstonFacet implantUS20050131538 *Jun 2, 2004Jun 16, 2005Alan ChervitzSpinal facet implants with mating articulating bearing surface and methods of useUS20050131545 *Jun 2, 2004Jun 16, 2005Alan ChervitzSpinal facet implant with spherical implant apposition surface and bone bed and methods of useUS20050154461 *Jan 7, 2005Jul 14, 2005Sdgi Holdings, Inc.Dual articulating spinal device and methodUS20050154465 *Jan 7, 2005Jul 14, 2005Sdgi Holdings, Inc.Split spinal device and methodUS20050159746 *Jan 21, 2004Jul 21, 2005Dieter GrobCervical facet resurfacing implantUS20050171609 *Jan 7, 2005Aug 4, 2005Sdgi Holdings, Inc.Spinal arthroplasty device and methodUS20050171610 *Jan 7, 2005Aug 4, 2005Sdgi Holdings, Inc.Mobile bearing spinal device and methodUS20050177240 *Jun 10, 2004Aug 11, 2005Jason BlainVertebral facet joint prosthesis and method of fixationUS20050267522 *Oct 25, 2004Dec 1, 2005Cardiva Medical, Inc.Self-tensioning vascular occlusion device and method for its useUS20050287130 *Aug 17, 2005Dec 29, 2005University Of RochesterMethods of modifying cell structure and remodeling tissueUS20060004451 *Sep 1, 2005Jan 5, 2006Facet Solutions, Inc.Facet joint replacementUS20060036243 *Aug 13, 2004Feb 16, 2006Ricardo SassoReplacement facet joint and methodUS20060064099 *May 10, 2005Mar 23, 2006Paul PavlovArticular facet interference screwUS20060111782 *Sep 22, 2005May 25, 2006Orthopedic Development CorporationSpinal plug for a minimally invasive facet joint fusion systemUS20060122609 *Feb 11, 2005Jun 8, 2006Srdjan MirkovicMethod and apparatus for spinal stabilizationUS20060122610 *Jul 20, 2005Jun 8, 2006Culbert Brad SMethod and apparatus for spinal stabilizationUS20060149289 *Feb 8, 2005Jul 6, 2006St. Francis Medical Technologies, Inc.Inter-cervical facet implant and methodUS20060155279 *Oct 26, 2005Jul 13, 2006Axial Biotech, Inc.Apparatus and method for concave scoliosis expansionUS20060235391 *Mar 7, 2006Oct 19, 2006Sutterlin Chester IiiFacet joint stabilizationUS20060247650 *Dec 14, 2005Nov 2, 2006St. Francis Medical Technologies, Inc.Inter-cervical facet joint fusion implantUS20060271050 *Apr 20, 2006Nov 30, 2006Gabriel Piza VallespirInstrumentation and methods for reducing spinal deformitiesUS20060276801 *Apr 4, 2006Dec 7, 2006Yerby Scott AInter-cervical facet implant distraction toolUS20060276897 *Dec 14, 2005Dec 7, 2006St. Francis Medical Technologies, Inc.Implant for stabilizing a bone graft during spinal fusionUS20070016191 *Dec 8, 2005Jan 18, 2007Culbert Brad SMethod and apparatus for spinal stabilizationUS20070055373 *Sep 8, 2005Mar 8, 2007Zimmer Spine, Inc.Facet replacement/spacing and flexible spinal stabilizationUS20070149976 *Mar 9, 2007Jun 28, 2007Gerraspine A.G.Method for resurfacing a lumbar articular facetUS20070179619 *Mar 9, 2007Aug 2, 2007Gerraspine A.G.Method for resurfacing a cervical articular facetUS20070250166 *Apr 25, 2006Oct 25, 2007Sdgi Holdings, Inc.Facet fusion implants and methods of useUS20070270959 *Apr 18, 2006Nov 22, 2007Sdgi Holdings, Inc.Arthroplasty deviceUS20080045954 *Jul 31, 2007Feb 21, 2008Reiley Mark AProstheses, systems and methods for replacement of natural facet joints with artificial facet joint surfacesUS20080097433 *Sep 14, 2006Apr 24, 2008Warsaw Orthopedic, Inc.Methods for Correcting Spinal DeformitiesUS20080114402 *Nov 10, 2006May 15, 2008Warsaw Orthopedic, Inc.Devices and Methods for Correcting a Spinal DeformityUS20080172090 *Jan 12, 2007Jul 17, 2008Warsaw Orthopedic, Inc.Spinal Prosthesis SystemsUS20080234678 *Mar 19, 2008Sep 25, 2008Robert GutierrezRod reducerUS20080249571 *Jun 12, 2008Oct 9, 2008Sasso Ricardo CReplacement facet joint and methodUS20080255615 *Mar 27, 2007Oct 16, 2008Warsaw Orthopedic, Inc.Treatments for Correcting Spinal DeformitiesUS20080262554 *May 23, 2008Oct 23, 2008Stanley Kyle HayesDyanamic rodUS20080269805 *Apr 25, 2007Oct 30, 2008Warsaw Orthopedic, Inc.Methods for correcting spinal deformitiesUS20080275505 *Jun 27, 2008Nov 6, 2008Hansen YuanProstheses, Tools and Methods for Replacement of Natural Facet Joints With Artificial Facet Joint SurfacesUS20090030460 *Sep 29, 2008Jan 29, 2009Facet Solutions, Inc.Linked bilateral spinal facet implants and methods of useUS20090030461 *Sep 29, 2008Jan 29, 2009Facet Solutions, Inc.Spinal Facet Joint ImplantUS20090030465 *Sep 18, 2008Jan 29, 2009Moti AltaracDynamic rodUS20090082775 *Dec 5, 2008Mar 26, 2009Moti AltaracSpondylolisthesis reduction system and methodUS20090088803 *Oct 1, 2007Apr 2, 2009Warsaw Orthopedic, Inc.Flexible members for correcting spinal deformitiesUS20090125032 *Nov 13, 2008May 14, 2009Gutierrez Robert CRod removal instrumentUS20090125047 *Jan 16, 2009May 14, 2009Joey Camia ReglosTissue splitterUS20090177237 *Sep 24, 2008Jul 9, 2009Spartek Medical, Inc.Cervical spine implant system and methodUS20090228045 *Feb 5, 2009Sep 10, 2009Stanley Kyle HayesDynamic rodUS20090248075 *Mar 26, 2008Oct 1, 2009Warsaw Orthopedic, Inc.Devices and methods for correcting spinal deformitiesUS20090254184 *Jun 15, 2009Oct 8, 2009Warsaw Orthopedic, Inc.Spinal Arthroplasty Device and MethodUS20100036423 *Feb 11, 2010Stanley Kyle HayesDynamic rodUS20100121379 *Jan 20, 2010May 13, 2010U.S. Spinal Technologies, LlcPedicle and non-pedicle based interspinous and lateral spacersUS20100174314 *Jan 12, 2010Jul 8, 2010Srdjan MirkovicMethod and apparatus for spinal stabilizationUS20100179598 *Jul 15, 2010Paul PavlovMethod for locking an artificial facet between two vertebral bodiesUS20100234905 *Sep 16, 2010John SledgeFacet joint resurfacing implant and associated surgical methodsUS20110060366 *Jun 30, 2008Mar 10, 2011Stephen HeimFacet Joint Implant and Related MethodsUS20110166610 *Jul 7, 2011Moti AltaracSystems and methods for stabilization of bone structures, including thorocolumbar stabilization systems and methodsUS20110190826 *Aug 4, 2011Warsaw Orthopedic, Inc.Devices and Methods for Correcting Spinal DeformitiesUS20120046695 *Apr 18, 2008Feb 23, 2012Spinal Elements, Inc.Implant and method for facet immobilizationUS20130116732 *Nov 13, 2012May 9, 2013Paul PavlovMethod for Locking an Artificial Facet Between Two Vertebral BodiesUS20130245693 *May 6, 2013Sep 19, 2013Spinal Elements, Inc.Vertebral facet joint prosthesis and method of fixationUS20140058447 *Mar 18, 2013Feb 27, 2014Alan ChervitzSpinal Facet Implants with Mating Articulating Bearing Surface and Methods of UseUSD724733Oct 26, 2011Mar 17, 2015Spinal Elements, Inc.Interbody bone implantUSD748262Jan 23, 2015Jan 26, 2016Spinal Elements, Inc.Interbody bone implantUSD748793Jan 23, 2015Feb 2, 2016Spinal Elements, Inc.Interbody bone implantWO2006020464A2 *Aug 3, 2005Feb 23, 2006Ricardo SassoReplacement facet joint and methodWO2006020464A3 *Aug 3, 2005Dec 28, 2006Kevin T FoleyReplacement facet joint and methodWO2008042602A2 *Sep 19, 2007Apr 10, 2008Sasso Ricardo CReplacement facet joint and methodWO2008042602A3 *Sep 19, 2007Jun 12, 2008Kevin T FoleyReplacement facet joint and method* Cited by examinerClassifications U.S. Classification606/247, 606/279, 606/330International ClassificationA61F2/02, A61F2/44, A61F2/00, A61B17/70Cooperative ClassificationA61B17/7064, A61F2002/30522, A61F2/4405, A61F2220/0025, A61F2002/3055, A61F2250/0007European ClassificationA61F2/44A, A61B17/70P2Legal EventsDateCodeEventDescriptionMay 9, 2002ASAssignmentOwner name: QUEEN S UNIVERSITY AT KINGSTON, CANADAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SOBOLESKI, DONALD A.;SAUNDERS, GERALD A.B.;BORSCHNECK, DANIEL P.;REEL/FRAME:012891/0157;SIGNING DATES FROM 20020426 TO 20020508Feb 5, 2007ASAssignmentOwner name: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT, WAFree format text: SECURITY AGREEMENT;ASSIGNOR:ST. 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