Adjustable patella fixing structure

Abstract

The invention discloses an adjustable patella fixing structure which comprises a first fixing plate and a second fixing plate, a fixing claw is arranged at the right end of the first fixing plate, and a screw hole is formed in the second fixing plate; a first anti-skid groove is formed in the left end of the first fixing plate, a second anti-skid groove is formed in the right end of the second fixing plate, the first anti-skid groove is formed in the rear end face of the first fixing plate, the second anti-skid groove is formed in the front end face of the second fixing plate, a long hole matched with a locking screw is formed in the first fixing plate, and the locking screw is arranged in the long hole. And a locking hole matched with the locking screw is formed in the second fixing plate. The adjustable patella fixing structure is ingenious in design, simple in structure and practical in function, and effectively solves the problems that most patella claws in the prior art are of an integrated structure, the separation distance of a lower pole fracture cannot be adjusted, and the patella claws cannot adapt to various patella sizes.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to an adjustable patella fixation structure. Background Art

[0002] Patella fracture is a common type of fracture, and the treatment method is mainly selected according to the type of fracture, the degree of displacement, and the physical condition of the patient, etc. The patella claw is a new type of internal fixation device. Its shape is adapted to the anatomical shape of the patella, and it fixes the fracture fragments by grasping the upper and lower poles of the patella, having the advantages of reliable fixation and little damage to the soft tissues around the patella, and is especially suitable for comminuted fractures. However, most of the existing patella claws are of an integral structure, and it is impossible to adjust the distance of separation of the lower pole fracture, and it is impossible to adapt to various patella sizes. Therefore, how to develop an adjustable patella fixation structure has become an urgent problem to be solved in this field. Summary of the Invention

[0003] The purpose of the present invention is to provide an adjustable patella fixation structure to solve the problem that most of the existing patella claws are of an integral structure, and it is impossible to adjust the distance of separation of the lower pole fracture, and it is impossible to adapt to various patella sizes.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An adjustable patella fixation structure of the present invention includes a first fixing plate and a second fixing plate. A fixing claw is provided at the right end of the first fixing plate, and screw holes are provided on the second fixing plate; a first anti-slip groove is provided at the left end of the first fixing plate, and a second anti-slip groove is provided at the right end of the second fixing plate. The first anti-slip groove is provided on the rear end face of the first fixing plate, and the second anti-slip groove is provided on the front end face of the second fixing plate. A long hole for cooperating with a locking screw is provided on the first fixing plate, and a locking hole for cooperating with the locking screw is provided on the second fixing plate.

[0006] Further, the locking hole on the second fixing plate is in threaded cooperation with the locking screw.

[0007] Further, a fixing pressing plate is provided at the left end of the second fixing plate, and a first screw hole is provided on the fixing pressing plate.

[0008] Further, a second screw hole for cooperating with the long hole is provided on the second fixing plate.

[0009] Further, a second fixing screw is provided in the second screw hole on the second fixing plate, and the second fixing screw does not contact the long hole on the first fixing plate.

[0010] Further, a first fixing screw is provided in the first screw hole of the first fixing plate.

[0011] Further, the axes of the first fixing screw and the second fixing screw on the first fixing plate are in the same plane, and the included angle between the axis of the first fixing screw and the axis of the second fixing screw is 57°.

[0012] Further, guide bars are provided on the rear end surface of the first fixing plate and are adapted to the upper end surface and the lower end surface of the first fixing plate.

[0013] Further, a needle hole is provided at the right end of the first fixing plate, and a claw tip is provided at the end of the fixing claw.

[0014] Further, the number of the claw tips is two.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0016] For the adjustable patella fixation structure of the present invention, the fitting distance between the first fixing plate and the second fixing plate can be adjusted through the anti-slip grooves and the long holes, so that the separation distance of the lower pole fracture can be adjusted for both near and far, and various patella sizes can be adapted; the adjustable patella fixation structure of the present invention fixes the fracture accurately, has a compression effect between the fracture ends, can provide double protection for reducing the tension of the patellar ligament, the steel plate fits the anatomical shape of the patella, and there is no skin and ligament irritation discomfort during exercise. Generally speaking, the adjustable patella fixation structure of the present invention is ingeniously designed, has a simple structure and practical functions, and effectively solves the problems in the prior art that most patella claws are of an integral structure, the separation distance of the lower pole fracture cannot be adjusted, and various patella sizes cannot be adapted. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the drawings:

[0018] Figure 1 is the front view of the adjustable patella fixation structure of the present invention;

[0019] Figure 2 is the top view of the adjustable patella fixation structure of the present invention;

[0020] Figure 3 is the bottom view of the adjustable patella fixation structure of the present invention;

[0021] Figure 4 is the right view of the adjustable patella fixation structure of the present invention;

[0022] Figure 5 is the axonometric view (angle one) of the adjustable patella fixation structure of the present invention;

[0023] Figure 6 is the axonometric view (angle two) of the adjustable patella fixation structure of the present invention;

[0024] Figure 7 This is the implanted state diagram of the adjustable patella fixation structure of the present invention.

[0025] Explanation of reference numerals: 1. First fixing plate; 101. Fixing claw; 102. First anti-slip groove; 103. Long hole; 104. Guide bar; 105. Needle hole; 106. Claw tip; 2. Second fixing plate; 201. Fixing pressing plate; 202. First screw hole; 203. Second screw hole; 204. Second anti-slip groove; 3. First fixing screw; 4. Second fixing screw; 5. Locking screw. Detailed implementation manners

[0026] As Figures 1 to 6 shown, an adjustable patella fixation structure includes a first fixing plate 1 and a second fixing plate 2. A fixing claw 101 is provided at the right end of the first fixing plate 1. A needle hole 105 is provided at the right end of the first fixing plate 1. A claw tip 106 is provided at the end of the fixing claw 101. The number of the claw tips 106 is two. Screw holes are provided on the second fixing plate 2, and the specific number of the screw holes is two.

[0027] A first anti-slip groove 102 is provided at the left end of the first fixing plate 1. A second anti-slip groove 204 is provided at the right end of the second fixing plate 2. The first anti-slip groove 102 is provided on the rear end face of the first fixing plate 1. The second anti-slip groove 204 is provided on the front end face of the second fixing plate 2. A guide bar 104 cooperating with the upper end face and the lower end face of the first fixing plate 1 is provided on the rear end face of the first fixing plate 1. The arrangement of the guide bar 104 can ensure that the first fixing plate 1 and the second fixing plate 2 are on the same straight line. A long hole 103 cooperating with the locking screw 5 is formed on the first fixing plate 1. A locking hole cooperating with the locking screw 5 is formed on the second fixing plate 2. Before use, the matching length of the first fixing plate 1 and the second fixing plate 2 needs to be selected according to the size of the patella. The first fixing plate 1 and the second fixing plate 2 can be fixed by the locking screw 5, the locking hole, the long hole 103, the first anti-slip groove 102 and the second anti-slip groove 204.

[0028] The locking hole on the second fixing plate 2 is in threaded cooperation with the locking screw 5.

[0029] A fixing pressing plate 201 is provided at the left end of the second fixing plate 2. A first screw hole 202 is provided on the fixing pressing plate 201. A second screw hole 203 cooperating with the long hole 103 is formed on the second fixing plate 2. A second fixing screw 4 is arranged in the second screw hole 203 on the second fixing plate 2, and the second fixing screw 4 does not contact the long hole 103 on the first fixing plate 1.

[0030] A first fixing screw 3 is arranged in the first screw hole 202 of the first fixing plate 1.

[0031] The axes of the first fixing screw 3 and the second fixing screw 4 on the first fixing plate 1 are in the same plane, and the included angle between the axis of the first fixing screw 3 and the axis of the second fixing screw 4 is 57°, ensuring that the second fixing plate 2 can closely fit the patella.

[0032] As Figure 7 shown, the setting process of the adjustable patella fixation structure of the present invention is as follows:

[0033] Step 1: Longitudinally incise the skin at the lower pole of the patella by about 3 cm to expose the fracture ends.

[0034] Step 2: Insert the second fixing plate 2 into the proximal end along the patella surface, align the first screw hole 202 with the proximal bone surface of the patella, incise the skin about 0.5 cm above the first screw hole 202, and insert a first fixing screw 3 of appropriate length to fix the second fixing plate 2.

[0035] Step 3: The fixing claws 101 of the first fixing plate 1 grasp the lower pole fracture fragment, and two high-tensile wires are inserted through the pin holes 105 of the first fixing plate 1.

[0036] Step 4: The first fixing plate 1 is installed into the second fixing plate 2 through the guiding strip 104.

[0037] Step 5: Insert a second fixing screw 4 of appropriate length into the second screw hole 203 of the second fixing plate 2, gradually adjust and tighten the first fixing plate 1 and the second fixing plate 2 to compress the fracture ends, adjust the pressure in the anti-slip groove between the first fixing plate 1 and the second fixing plate 2, and lock it with the locking screw 5.

[0038] Step 6: The high-tensile wires inserted through the pin holes 105 are used to suture and appropriately tighten the patellar ligament to reduce the tension at the fracture ends.

[0039] Step 7: Fix the fracture and provide double protection for the reduction of the patellar ligament tension.

[0040] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An adjustable patella fixation structure, characterized in that: It includes a first fixing plate (1) and a second fixing plate (2). A fixing claw (101) is provided at the right end of the first fixing plate (1), and screw holes are provided on the second fixing plate (2). A first anti-slip groove (102) is provided at the left end of the first fixing plate (1), and a second anti-slip groove (204) is provided at the right end of the second fixing plate (2). The first anti-slip groove (102) is provided on the rear end face of the first fixing plate (1), and the second anti-slip groove (204) is provided on the front end face of the second fixing plate (2). A long hole (103) matching with a locking screw (5) is formed on the first fixing plate (1), and a locking hole matching with the locking screw (5) is formed on the second fixing plate (2).

2. The adjustable patella fixation structure according to claim 1, characterized in that: The locking hole on the second fixing plate (2) is in threaded fit with the locking screw (5).

3. The adjustable patella fixation structure according to claim 1, characterized in that: A fixing pressing plate (201) is provided at the left end of the second fixing plate (2), and a first screw hole (202) is provided on the fixing pressing plate (201).

4. The adjustable patella fixation structure according to claim 3, characterized in that: A second screw hole (203) matching with the long hole (103) is formed on the second fixing plate (2).

5. The adjustable patella fixation structure according to claim 4, characterized in that: A second fixing screw (4) is provided in the second screw hole (203) on the second fixing plate (2), and the second fixing screw (4) does not contact the long hole (103) on the first fixing plate (1).

6. The adjustable patella fixation structure according to claim 3, characterized in that: A first fixing screw (3) is provided in the first screw hole (202) on the first fixing plate (1).

7. The adjustable patella fixation structure according to claim 1, characterized in that: The axes of the first fixing screw (3) and the second fixing screw (4) on the first fixing plate (1) are in the same plane, and the included angle between the axis of the first fixing screw (3) and the axis of the second fixing screw (4) is 57°.

8. The adjustable patella fixation structure according to claim 1, characterized in that: A guiding strip (104) matching with the upper end face and the lower end face of the first fixing plate (1) is provided on the rear end face of the first fixing plate (1).

9. The adjustable patella fixation structure according to claim 1, wherein: A pin hole (105) is provided at the right end of the first fixing plate (1), and a claw tip (106) is provided at the end of the fixing claw (101).

10. The adjustable patella fixation structure according to claim 9, wherein: The number of the claw tips (106) is two.

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