A dislocation-proof and soft tissue irritation-proof active unicompartmental knee replacement tibial tray prosthesis

Abstract

The utility model relates to an anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis, belonging to the technical field of medical devices. The tibial tray prosthesis comprises: a tibial tray prosthesis body (1); a backing plate (2) arranged on the upper end surface of the tibial tray prosthesis body (1); and an arc-shaped height-increasing edge (3) arranged on the upper end surface of the tibial tray prosthesis body (1), which is arranged opposite to the backing plate (2). Compared with the prior art, the utility model effectively solves this problem through its innovative arc-shaped height-increasing edge design. In addition, traditional prostheses also have shortcomings in reducing the stimulation of the medial (or lateral) soft tissue, while the utility model significantly improves this point through its biomechanically friendly design.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an anti-dislocation and anti-soft tissue irritation active type unicompartmental knee replacement tibial support prosthesis. Background Art

[0002] Unicompartmental knee replacement surgery, professionally known as Unicompartmental Knee Arthroplasty (UKA), is a surgical method used when degenerative or inflammatory diseases of the knee are limited to a single condyle (usually the medial or lateral condyle). In this operation, the damaged condyle is precisely removed and replaced with a specially designed artificial prosthesis. Compared with Total Knee Arthroplasty (TKA), the advantage of UKA is that it retains more of the natural structure of the knee, including the cruciate ligaments and healthy articular cartilage, thereby providing patients with a more natural knee feeling and better mobility.

[0003] In UKA, the tibial tray prosthesis plays a vital role. It not only needs to restore the flatness of the joint surface, but also needs to bear and distribute the pressure generated by the knee joint during activities. However, the design of traditional mobile tibial tray prosthesis faces some challenges.

[0004] Traditional mobile tibial trays used in UKA are usually designed with smooth contact surfaces that are used to contact the artificial spacer to simulate the sliding movement of the natural joint. However, this design is prone to excessive movement of the spacer during joint movement, especially when subjected to repetitive loads or multi-directional movement. Over time, this excessive movement may cause the spacer to dislocate or even cause the spacer to wear or be damaged, requiring re-surgical intervention.

[0005] In addition, conventional prostheses may cause excessive stimulation and irritation of sensitive soft tissues such as the medial (or lateral) collateral ligament during joint movement. This continuous friction and compression can lead to local inflammatory reactions, which increase postoperative pain, swelling, and may limit the range of motion of the joint. Therefore, optimizing the design of the tibial tray prosthesis to reduce these side effects is an important need in unicompartmental knee replacement surgery. Utility Model Content

[0006] The purpose of the utility model is to overcome at least one of the defects of the above-mentioned prior art and to provide an anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial support prosthesis to improve the success rate of unicompartmental knee replacement surgery and the quality of life of patients.

[0007] The utility model adds an arc-shaped height-enhancing edge with a height of 1mm to 20mm on the inner (or outer) edge of the prosthesis. This specially designed edge structure can better fix the gasket and reduce the risk of instability and dislocation during joint movement. This height-enhancing edge provides a more stable support and guidance for the gasket by matching the thickness and shape of the gasket, thereby optimizing the movement trajectory and distributed load of the joint.

[0008] In addition, through the carefully designed arc-shaped heightened edge, the tibial tray prosthesis of the utility model can also effectively reduce the pressure and stimulation on the medial soft tissue during joint movement, especially on the medial collateral ligament. This design can reduce postoperative inflammatory response, improve patient comfort, and reduce the risk of long-term complications.

[0009] The purpose of the utility model can be achieved through the following technical solutions:

[0010] A dislocation-proof and soft tissue irritation-proof active unicompartmental knee replacement tibial tray prosthesis, the tibial tray prosthesis comprising:

[0011] tibial tray prosthesis body;

[0012] A support plate disposed on the upper end surface of the tibial tray prosthesis body;

[0013] The arc-shaped heightened edge is arranged on the upper end surface of the tibial support prosthesis body and is arranged opposite to the backing plate.

[0014] Furthermore, the height of the arc-shaped raised edge is 1-20 mm.

[0015] Furthermore, the contact surface between the arc-shaped height-enhancing edge and the soft tissue is coated with an anti-inflammatory coating.

[0016] Furthermore, the backing plate abuts against the side of the tibial resection lesion area.

[0017] Furthermore, the tibial support prosthesis body is used to support the tibial pad; the arc-shaped heightened edge matches the thickness and shape of the tibial pad to limit the sliding and displacement of the tibial pad.

[0018] Furthermore, the contact surface between the tibial tray prosthesis body and the tibial pad is a smooth contact surface.

[0019] Furthermore, the contact surface between the tibial tray prosthesis body and the tibial pad is coated with a wear-resistant coating.

[0020] Furthermore, a fixing portion fixed to the tibia is provided on the lower end surface of the tibial tray prosthesis body.

[0021] Furthermore, the tibial tray prosthesis is a biocompatible tibial tray prosthesis. Preferably, the tibial tray prosthesis is a porous tantalum tibial tray prosthesis.

[0022] Compared with conventional tibial tray prostheses, the main advantage of the present invention is that it significantly reduces spacer dislocation and medial (or lateral) soft tissue irritation. Spacer dislocation is a common problem in conventional prostheses due to the lack of an effective spacer fixation mechanism, and the present invention effectively solves this problem through its innovative curved height-enhancing edge design. In addition, conventional prostheses are also insufficient in reducing irritation to medial (or lateral) soft tissue, and the present invention significantly improves this through its biomechanically friendly design. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the tibial support prosthesis in Example 1;

[0024] Figure 2 is a front view of the tibial tray prosthesis in Example 1;

[0025] Figure 3 is a side view of the tibial tray prosthesis in Example 1;

[0026] Figure 4 is a top view of the tibial tray prosthesis in Example 1;

[0027] As shown in the figure: 1-tibial support prosthesis body; 2-back plate; 3-arc-shaped height-enhancing edge; 4-fixing part. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0029] Example 1

[0030] See also Figure 1-4 A tibial tray prosthesis for anti-dislocation and anti-soft tissue irritation active knee unicompartmental replacement is disclosed. The tibial tray prosthesis comprises: a tibial tray prosthesis body 1; a support plate 2 arranged on the upper end surface of the tibial tray prosthesis body 1; and an arc-shaped heightened edge 3 arranged on the upper end surface of the tibial tray prosthesis body 1, which is arranged opposite to the support plate 2.

[0031] In this embodiment, the support plate 2 abuts against the side of the tibial resection area; the contact surface between the tibial tray prosthesis body 1 and the tibial pad is a smooth contact surface; the lower end surface of the tibial tray prosthesis body 1 is provided with a fixing portion 4 fixed to the tibia.

[0032] In this embodiment, the tibial support prosthesis body 1 is used to support the tibial pad; the arc-shaped height-enhancing edge 3 matches the thickness and shape of the tibial pad to limit the sliding and displacement of the tibial pad, and the height of the arc-shaped height-enhancing edge 3 is 1-20 mm. In order to better cooperate with the tibial support prosthesis of this embodiment, the design of the tibial pad can also be modified accordingly. These modifications may include adjusting the shape, size and material of the pad to better adapt to the structure and function of the arc-shaped height-enhancing edge. In addition, the pad material can also be selected to be more wear-resistant and biocompatible to improve the long-term success rate of the operation.

[0033] How it works

[0034] In unicompartmental knee replacement surgery, the tibial tray prosthesis of this embodiment replaces the damaged tibial surface. The arc-shaped heightened edge 3 of the prosthesis effectively fixes the tibial pad to prevent sliding or displacement during knee joint movement. This stability is essential for maintaining normal knee joint movement, especially during repeated or multi-directional activities.

[0035] At the same time, the design of the arc-shaped height-enhancing edge 3 also takes into account the protection of sensitive soft tissues such as the medial collateral ligament or the lateral collateral ligament. By reducing the direct contact between the tibial pad and the soft tissue, the irritation and stimulation of these tissues are significantly reduced, thereby reducing postoperative pain and swelling and accelerating the recovery process.

[0036] Example 2

[0037] This embodiment is basically the same as the embodiment 1, except that in this embodiment, a layer of anti-inflammatory coating is coated on the contact surface between the arc-shaped heightened edge 3 and the soft tissue. The purpose of this coating is to reduce the inflammatory response of the soft tissue after surgery. The anti-inflammatory coating can be made of a variety of materials, such as biocompatible anti-inflammatory drugs or natural anti-inflammatory compounds. This coating can release anti-inflammatory substances when contacting the inner or outer soft tissue, thereby reducing local inflammatory response, reducing postoperative pain and swelling, and accelerating the recovery process.

[0038] Example 3

[0039] This embodiment is basically the same as the embodiment 1, except that in this embodiment, a layer of wear-resistant coating is coated on the contact surface between the tibial tray prosthesis body 1 and the tibial pad.

[0040] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A dislocation-proof and soft tissue irritation-proof active unicompartmental knee replacement tibial tray prosthesis, characterized in that: The tibial tray prosthesis comprises: Tibial tray prosthesis body (1); A support plate (2) arranged on the upper end surface of the tibial support prosthesis body (1); An arc-shaped height-enhancing edge (3) is arranged on the upper end surface of the tibial support prosthesis body (1) and is arranged opposite to the backing plate (2).

2. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 1, characterized in that: The height of the arc-shaped heightened edge (3) is 1-20 mm.

3. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 1, characterized in that: The contact surface between the arc-shaped height-enhancing edge (3) and the soft tissue is coated with an anti-inflammatory coating.

4. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 1, characterized in that: The backing plate (2) abuts against the side edge of the tibial resection focus area.

5. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 1, characterized in that: The tibial support prosthesis body (1) is used to support the tibial pad; the arc-shaped height-enhancing edge (3) matches the thickness and shape of the tibial pad to limit the sliding and displacement of the tibial pad.

6. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 5, characterized in that: The contact surface between the tibial support prosthesis body (1) and the tibial pad is a smooth contact surface.

7. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 5, characterized in that: The contact surface between the tibial tray prosthesis body (1) and the tibial pad is coated with a wear-resistant coating.

8. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 5, characterized in that: The lower end surface of the tibial support prosthesis body (1) is provided with a fixing portion (4) fixed to the tibia.

9. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 1, characterized in that: The tibial tray prosthesis is a biocompatible tibial tray prosthesis.

10. The anti-dislocation and anti-soft tissue irritation active unicompartmental knee replacement tibial tray prosthesis according to claim 1, characterized in that: The tibial tray prosthesis is a porous tantalum tibial tray prosthesis.

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