A tibial plateau posterolateral c-shaped locking plate and internal fixation system

Abstract

The application provides a tibial plateau posterolateral C-shaped locking plate and an internal fixation system. The tibial plateau posterolateral C-shaped locking plate comprises an anatomic plate body, the plate body is in a C shape as a whole, comprises a first horizontal plate and a second horizontal plate, a connecting plate is connected between the first horizontal plate and the second horizontal plate, the first horizontal plate is used for being connected in close contact with the edge of the tibial plateau, the second horizontal plate is used for being fixed on the tibia below the tibial plateau and the medial fibula, and the length of the first horizontal plate is greater than that of the second horizontal plate. The application aims to provide a tibial plateau posterolateral C-shaped locking plate, the second horizontal plate and the first horizontal plate can form an up-down supporting structure, the second horizontal plate of the C-shaped locking plate plays a pressure supporting role on the first horizontal plate, the overall bone plate mechanical property is more stable, and the tibial plateau posterolateral collapse position can be effectively reset.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of bone plates, in particular to a tibial plateau posterolateral C-shaped locking plate and internal fixation system. BACKGROUND

[0002] Tibial plateau posterolateral fracture is one of the few sites without suitable equipment for fixation. The fracture of this site is mostly manifested as joint collapse. Since the fracture area is located at the posterolateral side of the tibial plateau and the anteromedial side of the fibula, it is difficult to effectively fix it in clinical practice. The currently used fixation method mainly uses an L-shaped locking plate. The L-shaped locking plate is placed on the anterolateral side of the tibial plateau, and the upper end has four screws arranged in a raft shape, which mainly fix the anterolateral fracture of the tibial plateau. However, the posterolateral side cannot be fixed, so some people have improved the proximal narrowing of the plate and placed it on the posterolateral side. However, the plate is placed using an anterolateral approach, which cannot directly reduce and support the fracture block. The plate is placed on the side of the bone block displacement rather than the pressure side or tension side, which is not advantageous in terms of mechanics and reduction. SUMMARY

[0003] Therefore, the present application aims to provide a tibial plateau posterolateral C-shaped locking plate and internal fixation system, which is more close to the shape of the posterolateral side of the tibial plateau and supports more stably to better fix the fracture block.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A tibial plateau posterolateral C-shaped locking plate, comprising an anatomical plate body, the plate body is C-shaped as a whole, comprising a first horizontal plate and a second horizontal plate, a connecting plate is connected between the first horizontal plate and the second horizontal plate, the first horizontal plate is used for abutting connection with the edge of the tibial plateau, the second horizontal plate is used for fixing on the medial side of the fibula and the tibia below the tibial plateau, and the length of the first horizontal plate is greater than that of the second horizontal plate.

[0006] As a preferred scheme of the above-mentioned tibial plateau posterolateral C-shaped locking plate, the first horizontal plate is provided with a plurality of first screw holes, and the first screw holes are arranged in double rows along the length direction of the first horizontal plate.

[0007] As a preferred scheme of the above-mentioned tibial plateau posterolateral C-shaped locking plate, 2 to 4 second screw holes are formed in the second horizontal plate.

[0008] As a preferred scheme of the above-mentioned tibial plateau posterolateral C-shaped locking plate, 2 to 4 third screw holes are formed in the connecting plate.

[0009] As a preferred scheme of the above-mentioned tibial plateau posterolateral C-shaped locking plate, the connecting portion of the connecting plate and the first horizontal plate forms an arc-shaped structure.

[0010] As a preferred solution of the tibial plateau posterolateral C-shaped locking plate, the included angle a between the connecting plate and the first horizontal plate is 25-50°.

[0011] As a preferred solution of the tibial plateau posterolateral C-shaped locking plate, the connection between the connecting plate and the second horizontal plate is gradually widened from the connecting plate to the second horizontal plate.

[0012] As a preferred solution of the tibial plateau posterolateral C-shaped locking plate, 4-7 first screw holes are formed on the first horizontal plate.

[0013] As a preferred solution of the tibial plateau posterolateral C-shaped locking plate, the first horizontal plate, the second horizontal plate and the connecting plate are connected to form an integrated structure.

[0014] An internal fixation system, comprising a screw and the tibial plateau posterolateral C-shaped locking plate, the screw being used to fix the tibial plateau posterolateral C-shaped locking plate on the posterolateral side of the tibial plateau.

[0015] Compared with the prior art, the tibial plateau posterolateral C-shaped locking plate has the following advantages:

[0016] The tibial plateau posterolateral C-shaped locking plate, the first horizontal plate is used to be connected with the edge of the tibial plateau, the second horizontal plate is used to be fixed on the medial fibula and the tibia below the tibial plateau, the first horizontal plate is above the second horizontal plate, the second horizontal plate is between the tibia and the fibula, under the connection of the connecting plate, the second horizontal plate and the first horizontal plate can form an upper and lower support structure, the second horizontal plate of the C-shaped locking plate plays a pressure support role on the first horizontal plate, the overall bone plate mechanical property is more stable, and the tibial plateau posterolateral collapse site can be effectively reset. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the illustrative embodiments of the present application and their description are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0018] Fig. 1 It is a structural schematic view of the tibial plateau posterolateral C-shaped locking plate in the embodiment;

[0019] Fig. 2 It is a schematic view of an angle at which the tibial plateau posterolateral C-shaped locking plate in the embodiment is fixed on the tibia;

[0020] Fig. 3 It is another schematic view of an angle at which the tibial plateau posterolateral C-shaped locking plate in the embodiment is fixed on the tibia.

[0021] MARKING OF THE DRAWINGS:

[0022] 1-First horizontal plate; 2-Second horizontal plate; 3-Connecting plate; 4-First screw hole; 5-Second screw hole; 6-Third screw hole.

[0023] 10-Tibia; 20-Tibial plateau; 30-Fibula. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figs. 1-3 As shown, this embodiment provides a C-shaped locking plate for the posterolateral aspect of the tibial plateau, comprising an anatomical plate body. The plate body is C-shaped and includes a first transverse plate 1 and a second transverse plate 2. A connecting plate 3 connects the first transverse plate 1 and the second transverse plate 2. The first transverse plate 1 is used to fit and connect with the edge of the tibial plateau 20, and the second transverse plate 2 is used to fix it to the medial side of the fibula 30 and the tibia 10 below the tibial plateau 20. The length of the first transverse plate 1 is greater than the length of the second transverse plate 2. The first transverse plate 1, the second transverse plate 2, and the connecting plate 3 are interconnected to form an integral structure. In other embodiments, the first transverse plate 1, the second transverse plate 2, and the connecting plate 3 can also be separate spliced ​​structures.

[0027] In this embodiment, the C-type locking plate has a first transverse plate 1 for fitting and connecting with the edge of the tibial plateau 20, and a second transverse plate 2 for fixing to the inner side of the fibula 30 and the tibia 10 below the tibial plateau 20. After implantation, the first transverse plate 1 is located above the second transverse plate 2, and the second transverse plate 2 is between the tibia 10 and the fibula 30. With the connection of the connecting plate 3, the second transverse plate 2 and the first transverse plate 1 can form an upper and lower support structure. The second transverse plate 2 of the C-type locking plate provides pressure support to the first transverse plate 1, making the overall mechanical properties of the bone plate more stable and effectively reducing the collapsed area on the posterolateral side of the tibial plateau 20.

[0028] In this embodiment, the first horizontal plate 1 is provided with a plurality of first screw holes 4, which are arranged in two rows along the length of the first horizontal plate 1 to form a raft-like effect, thereby better fixing the fracture fragments. Specifically, 4 to 7 first screw holes 4 are provided on the first horizontal plate 1, arranged in two rows. 2 to 4 second screw holes 5 are provided on the second horizontal plate 2, preferably two. 2 to 4 third screw holes 6 are provided on the connecting plate 3.

[0029] In this embodiment, the first screw hole 4, the second screw hole 5, and the third screw hole 6 can be various hole types such as universal joint holes, pressure holes, and locking pressure connection holes. Different first screw holes 4, different second screw holes 5, and different third screw holes 6 can also be selected with different hole types.

[0030] In the embodiment, the connection between the connecting plate 3 and the first horizontal plate 1 forms an arc-shaped structure, which avoids the connection between the first horizontal plate 1 and the connecting plate 3 forming a sharp corner, and avoids the sharp corner scratching or irritating the soft tissue during or after implantation.

[0031] The included angle α between the connecting plate 3 and the first horizontal plate 1 is 25°-50°, and the connecting plate 3 is inclined to the free end of the first horizontal plate 1 as a whole, which can make the second horizontal plate 2 extend to the position between the fibula 30 and the tibia 10.

[0032] In the embodiment, the connection between the connecting plate 3 and the second horizontal plate 2 gradually widens from the connecting plate 3 to the second horizontal plate 2, and the inner edge of the connecting plate 3 and the inner edge of the second horizontal plate 2 are connected to form a circular arc-shaped edge, which forms a smooth transition between the connecting plate 3 and the second horizontal plate 2 and can ensure that the C-shaped locking plate has good mechanical properties.

[0033] The plate body of the posterolateral C-shaped locking plate of the tibial plateau can be made of alloy steel or titanium alloy or other suitable implantable biological materials.

[0034] The embodiment also provides an internal fixation system, which comprises a screw and a posterolateral C-shaped locking plate of a tibial plateau, and the screw is used to fix the posterolateral C-shaped locking plate of the tibial plateau to the posterolateral side of the tibial plateau 20.

[0035] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A posterior-lateral C-shaped tibial plateau locking plate comprising an anatomically shaped plate body, characterized in that: The plate body is C-shaped as a whole, comprising a first horizontal plate (1) and a second horizontal plate (2), a connecting plate (3) being connected between the first horizontal plate (1) and the second horizontal plate (2), the first horizontal plate (1) being used for being connected with the edge of the tibial plateau (20), the second horizontal plate (2) being used for being fixed on the tibia (10) inside the fibula (30) and below the tibial plateau (20), the length of the first horizontal plate (1) being greater than the length of the second horizontal plate (2); The connecting part of the connecting plate (3) and the first horizontal plate (1) forms an arc-shaped structure; the included angle α between the connecting plate (3) and the first horizontal plate (1) is 25°-50°; the connecting part of the connecting plate (3) and the second horizontal plate (2) gradually widens from the connecting plate (3) to the second horizontal plate (2); the first horizontal plate (1), the second horizontal plate (2) and the connecting plate (3) are connected with each other to form an integrated structure; the inner edge of the connecting plate (3) and the inner edge of the second horizontal plate (2) are connected to form a circular arc-shaped edge; The first horizontal plate (1) is provided with a plurality of first screw holes (4), the first screw holes (4) being arranged in double rows along the length direction of the first horizontal plate (1); 2-4 second screw holes (5) are formed on the second horizontal plate (2); 2-4 third screw holes (6) are formed on the connecting plate (3).

2. The posterior-lateral, type-C, tibial-plateau, locking-plate of claim 1, wherein: 4-7 first screw holes (4) are formed on the first horizontal plate (1).

3. An internal fixation system, comprising a screw and the tibial plateau posterolateral C-shaped locking plate according to any one of claims 1-2, the screw being used for fixing the tibial plateau posterolateral C-shaped locking plate on the posterolateral side of the tibial plateau (20).

Images