BONE FIXATION PLATE

A bone fixation plate for fixing a fracture part of a bone is disclosed and can stably fix on a surface of a bone. The bone fixation plate has a protruding curved face, an indentation curved face and two rows of through holes. The protruding curved face has a blank portion and two binding portions. A suture is retained in the through holes formed close to two end edges of the binding portions, so that the stability of the bone fixation plate is improved.

FIELD OF THE INVENTION

The present invention relates to a bone fixation plate, and more particularly to a bone fixation plate for stably fixing and positioning a fracture part of a bone.

BACKGROUND OF THE INVENTION

Typically, a bone fixation plate is used to fix a fracture part of a bone of a patient, so that the fracture part of the bone will not be fractured again after be fixed, in order to enhance the healing of the fracture part of the bone. For example, a bone fixation plate for fixing fractures in phalange is disclosed in U.S. Pat. No. 4,790,302 and comprises an indentation curved face, a protruding curved face and a plurality of holes, wherein the holes are penetrated through the indentation curved face and the protruding curved face. Accordingly, the protruding curved face is attached closely to the inner surface of the bone by fixing the bone fixation plate into the bone, and the bone fixation plate is then fastened by screw-connecting to the bone through the holes. The above-mentioned bone fixation plate is only used to fix on the inner surface of the bone by screws. If the bone fixation plate is used to fix on the outer surface of the bone by binding sutures, the suture-bound bone fixation plate may be still loosed or slidable because the sutures can not be stably fixed on the smooth outer surface of the bone fixation plate. As a result, the positioning effect of the bone fixation plate for fixing on the outer surface of the bone is not good. Furthermore, the bone fixation plate must be fastened by screws, so that not only the process of drilling the bone is complicated, but also the operation will take longer time. Thus, the efficiency of the fixation process may be reduced.

Referring toFIGS. 1 and 2, a bone fixation plate1is designed to solve the above problem, wherein the bone fixation plate1has an indentation curved face11and a protruding curved face12opposite to the indentation curved face11, two long edges13and two short edges14are provided between the indentation curved face11and the protruding curved face12, the protruding curved face12has a plurality of channels15between the two short edges14, and two opposite ends of the channels15are extended to the two long edges13, respectively.

However, because the channels15are disposed on the protruding curved face12of the bone fixation plate1, the sutures are only placed in the channels15, and the effect of retaining the sutures is thus poor. When the bone fixation plate1is shifted by motion, the sutures in the channels15are easily loosed, so that the stability of the bone fixation plate needs to be improved.

Therefore, an improved bone fixation plate needs to be provided to solve the problem of prior art.

SUMMARY OF THE INVENTION

A primary object of the present invention is to provide a bone fixation plate, which provides two rows of through holes to bind a bone with sutures, so that the sutures can be stably retained in the through holes.

Another object of the present invention is to provide a bone fixation plate, which provides two notches, so that the bone fixation plate can be closely attached onto the bone, and the sutures are retained by retaining structures to avoid from loosing.

To achieve the above objects, the present invention provides a bone fixation plate for fixing a fracture part of a bone, which comprises: a protruding curved face having a blank portion and two binding portions, wherein the binding portions are extended from two opposite sides of the blank portion for winding sutures around the binding portions and the bone; an indentation curved face opposite to the protruding curved face for covering the fracture part and abutting against the bone; and two rows of through holes penetrated through the binding portions, wherein the two rows of through holes are located close to two opposite end edges of the binding portions, respectively.

In one embodiment of the present invention, the bone fixation plate further comprises at least two retaining structures, the retaining structures are channels separately formed on the two binding portions, and the two rows of the through holes are correspondingly communicated with two ends of one of the channels.

In one embodiment of the present invention, the bone fixation plate further comprises two notches, and the notches are formed on two opposite end edges of the blank portion.

To achieve the above objects, the present invention provides another bone fixation plate for fixing a fracture part of a bone, which comprises a protruding curved face having a blank portion and two binding portions, wherein the binding portions are extended from two opposite sides of the blank portion for winding sutures around the binding portions and the bone; an indentation curved face opposite to the protruding curved face for covering the fracture part and abutting against the bone; at least two retaining structures separately formed on the two binding portions; and two notches formed on two opposite end edges of the blank portion.

In one embodiment of the present invention, the bone fixation plate further comprises two rows of through holes penetrated through the binding portions, and the two rows of the through holes are located close to two opposite end edges of the binding portions, respectively.

In one embodiment of the present invention, each of the binding portions is formed with a pair of the through holes, and the through holes are located on the two opposite end edges, respectively.

In one embodiment of the present invention, each of the binding portions is formed with two or more pairs of the through holes, and the through holes are located on the two opposite end edges of each of the binding portions, respectively, and arranged corresponding to the retaining structures.

In one embodiment of the present invention, the retaining structures are protrusions or channels.

In one embodiment of the present invention, the radius of curvature of the indentation curved face is 3 mm to 5 mm.

In one embodiment of the present invention, the length of the blank portion is equal to or smaller than one third of an axial length of the protruding curved face.

As described above, in the present invention, the sutures are not only wound/bound around the binding portions and the bone, but also the sutures are bound through the through holes and limited in the through holes, so that the stability of the bone fixation plate is improved. Furthermore, the notches are formed on two opposite end edges of the blank portion, so that the bone fixation plate can be closely attached onto the bone, and the sutures are retained by the retaining structures to avoid from loosing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings. Furthermore, directional terms described by the present invention, such as upper, lower, front, back, left, right, inner, outer, side, longitudinal/vertical, transverse/horizontal, and etc., are only directions by referring to the accompanying drawings, and thus the used directional terms are used to describe and understand the present invention, but the present invention is not limited thereto.

Referring now toFIG. 3, a bone fixation plate2according to a first preferred embodiment of the present invention is illustrated. The bone fixation plate2is an arc-shaped plate which has a protruding curved face and an indentation curved face, both of which are opposite to each other, wherein the bone fixation plate2is made of biocompatibility material, e.g. biodegradable material, stainless steel or titanium, which is fixed on an outer surface of a bone, asFIGS. 1 and 2, so that an injury or fracture portion of a bone of palm or other bone can be fixed by the aid of the bone fixation plate2to enhance the recovery thereof. The detailed structure of each component, assembly relationships and principle of operation in the present invention will be described in detail thereinafter.

Referring back toFIG. 3, the bone fixation plate2comprises a protruding curved face21, an indentation curved face22, two notches23and two rows of through holes24, wherein the protruding curved face21is the outer surface of the bone fixation plate2for being bound by the sutures/wires as shown inFIGS. 1 and 2; the indentation curved face22is the inner surface of the bone fixation plate2and opposite to the protruding curved face21for attaching onto the bone; the protruding curved face21and the indentation curved face22are formed the arc-shaped plate, wherein the radius of curvature of the arc-shaped plate can be adjusted for different type of bones, the indentation curved face22is matched with a fracture part of the bone and attached to the bone by winding with sutures. In the embodiment, a bone of the palm is fixed by the bone fixation plate2. The radius of curvature of the indentation curved face22is preferably 3 mm to 5 mm, but not limited thereto.

Referring toFIG. 3again, the protruding curved face21has a blank portion211and two binding portions212, wherein the binding portions212are extended from two opposite sides of the blank portion211for winding sutures around the binding portions211and the bone. In the embodiment of the present invention, preferably, an axial length of the protruding curved face21of the bone fixation plate2is 2 cm to 4 cm, and a length of each of the binding portions211is equal to or smaller than one third of the axial length of the protruding curved face21.

Referring still toFIG. 3, the notches23are formed on two opposite end edges of the blank portion211, and two rows of through holes24penetrated through the binding portions212, wherein the two rows of through holes24are located close to two opposite end edges of the binding portions212, respectively, and each row of through holes24are spaced equidistantly for the sutures to pass therethrough.

As described above, after a fracture part of a bone is treated, the bone fixation plate2according to the embodiment is used, and the fracture part of the bone is fixed by the bone fixation plate2, wherein an appropriate radius of curvature of the bone fixation plate2must be pre-selected for matching with that of the fracture part of the bone. Furthermore, the amount of the bone fixation plate2is not limited, and can be one, two, three or more.

In the embodiment, two of the bone fixation plates2are used and placed on two opposite sides of the bone, respectively, and the bone fixation plates2are temporarily fixed by surgical instruments, so that the fracture part of the bone is commonly held and supported by two indentation curved faces22of the two bone fixation plates2.

Then, the sutures are guided along the binding portion of one of the bone fixation plates2by surgical instruments, and then pass through the through holes24thereof, so that the sutures are wound around the protruding curved face21of the other bone fixation plate2and pass through the through holes24thereof, wherein the end of the sutures are fixed by surgical instruments, and the process of the winding is operated several times until the bone fixation plates2are stably attached onto the bone, so that the positioning of the bone fixation plates2on the fracture part of the bone is finished.

As described above, in the present invention, the sutures are not only wound around the binding portions212and the bone, but also the sutures are bound through the through holes24and limited in the through holes24, so that the stability of the bone fixation plate2is improved. Furthermore, the notches23are formed on two opposite end edges of the blank portion211, so that the bone fixation plate2is closely attached to the bone, and the sutures are retained by the retaining structures to avoid from loosing.

Referring toFIG. 4, a bone fixation plate according to a second embodiment of the present invention is illustrated and similar to the first embodiment, so that the second embodiment uses similar terms or numerals of the first embodiment. As shown, the difference of the second embodiment is that the bone fixation plate further comprises at least two retaining structures25, the retaining structures25are recessed channels separately formed on the two binding portions212, and the two rows of the through holes24are correspondingly communicated with two ends of one of the channels, so that the sutures are limited in the through holes24and channels.

As above, when the sutures are wound around the binding portions212and the bone, the sutures are limited in the through holes24and channels, so that the sutures are retained by the retaining structures to avoid from loosing, and the stability of the bone fixation plate2is improved.

Referring toFIG. 5, a bone fixation plate according to a third embodiment of the present invention is illustrated and similar to the first embodiment, so that the third embodiment uses similar terms or numerals of the first embodiment. As shown, the difference of the third embodiment is that each of the binding portions212is only formed with a pair of the through holes24, and the through holes24are located on the two opposite end edges, respectively. The retaining structures25are recessed channels separately formed on the two binding portions212. When the sutures are wound around the binding portions212and the bone, the sutures are limited in the through holes24and channels, so that the sutures are retained by the retaining structures to avoid from loosing.

Referring toFIG. 6, a bone fixation plate according to a fourth embodiment of the present invention is illustrated and similar to the first embodiment, so that the fourth embodiment uses similar terms or numerals of the first embodiment. As shown, the difference of the fourth embodiment is that each of the binding portions212is formed with a pair of the through holes24, the through holes24are located on the two opposite end edges, respectively, And the retaining structures25are protrusions separately formed on the two binding portions212. When the sutures are around the binding portions212and the bone, the sutures are limited between two of the retaining structures25through the through holes24, so that the sutures are retained by the retaining structures to avoid from loosing.

As described above, the sutures are wound around the binding portions212and the bone, the sutures pass through the two rows of through holes24, so that the stability of the bone fixation plate2can be improved. The retaining structures25are protrusions or channels separately formed on the two binding portions212so that the sutures are retained/limited. Furthermore, the notches23are formed on two opposite end edges of the blank portion211, so that the bone fixation plate2is closely attached to the bone.