WO2013071872A1

WO2013071872A1 - Knee joint prosthesis

Info

Publication number: WO2013071872A1
Application number: PCT/CN2012/084666
Authority: WO
Inventors: 曲铁兵; 郑诚功; 丁玉宝; 宋大勇
Original assignee: 北京纳通科技集团有限公司
Priority date: 2011-11-18
Filing date: 2012-11-15
Publication date: 2013-05-23
Also published as: CN103120606A; CN103120606B

Abstract

A knee joint prosthesis has a liner component (1, 11) and a tibia component platform (2, 12). The liner component (1, 11) can be locked with the tibia component platform (2, 12). The bottom of the liner component (1, 11) is provided with a lateral guide structure, a front fixing wall (5, 15) and a rear fixing structure. The tibia component platform (2, 12) is provided with a lateral guide structure adapting to the liner component (1, 11), a front baffle wall (8, 18) and a rear fixing structure. In the knee joint prosthesis, the liner component (1, 11) can be locked on the tibia component platform (2, 12) more stably, and the liner component (1, 11) can be implanted into the tibia component platform (2, 12) at a smaller angle, thereby reducing the implantation opening required for implanting the liner component (1, 11), making the operation more convenient.

Description

Knee joint prosthesis

The present invention relates to an artificial knee joint prosthesis, and more particularly to a locking structure of an artificial knee joint prosthesis platform. Background technique

The current fixed platform total knee replacement prosthesis, the pad component and the tibial component platform are locked by forming a fixing groove along the edge contour of the tibial component platform, and the elastic snap and the fixing groove are provided in front and rear of the pad component. For the purpose of the closure, this type of closure tends to cause displacement between the pad component and the tibial component platform. Moreover, due to the arrangement of the fixing groove, the pad member is usually implanted in the vertical direction on the tibial component platform when implanting the tibial component platform, and for the purpose of surgery, a larger implantation angle is required. Causes a large defect in the implant opening.

Therefore, there is an urgent need to provide a knee prosthesis in which the cushion member can be stably locked to the tibial component platform and can be implanted at a smaller angle to the tibial component platform. Summary of the invention

It is an object of the present invention to provide a knee prosthesis in which the cushion member is stably locked to the tibial component platform.

Another object of the present invention is to provide a knee prosthesis in which the cushion member can also be implanted at a smaller angle into the tibial component platform.

To achieve the above object, the present invention provides a knee joint prosthesis having a cushion member and a tibial component platform, the bottom portion of which has a side guiding structure, a front fixing wall and a rear fixing structure. The upper portion of the tibial component platform has a side guiding structure, a front retaining wall and a rear securing structure that are adapted to the cushion member. The side guide structure of the tibial component platform cooperates with the side guide structure of the pad component to guide the pad component from the posterior to the tibial component platform. And, after the pad member is mounted on the tibial component platform, the front fixing wall and the rear fixing structure of the pad component are respectively engaged with the front wall and the rear fixing structure of the tibial component platform, thereby fixing the pad component to the tibial component on the platform.

According to the above concept, the side guiding structure of the pad member is a convex side guiding edge, and the side guiding structure of the tibial component platform is a side guiding fixing groove; or the side guiding structure of the pad member is a side guiding fixing groove, the tibial component platform The side guiding structure is a convex side guiding edge.

According to the above concept, the rear fixing structure of the cushion member is a rear fixed wall, and the rear fixing structure of the tibial component platform is rear The retaining wall; or, the rear fixing structure of the cushion member is a convex rear fixing edge, and the rear fixing structure of the tibial component platform is a rear fixing groove.

According to the above concept, the side guiding structure of the pad member and the side guiding structure of the tibial component platform are both inclined from the rear to the front.

According to the above concept, the angle of the inclination is 0 to 10 degrees, preferably 0.5 to 5 degrees.

According to the above concept, the front barrier wall of the tibial component platform is an integral barrier wall, or is formed by a plurality of segmented discontinuous barrier walls, or is a spring liftable barrier wall.

According to the above concept, the rear fixing structure of the cushion member and the rear fixing structure of the tibial component platform are integrally formed or formed of a plurality of segmented discontinuous structures.

According to the above concept, the side guiding structure of the pad member is located at both sides or the middle of the bottom portion of the pad member, and the side guiding structure of the tibial member platform is located at a position corresponding to the side guiding structure of the pad member.

According to the above concept, the side guiding structure of the pad member is a convex side guiding edge, the side guiding structure of the tibial component platform is a side guiding fixing groove, and the side guiding fixing groove has an extension extending toward the opposite inner side. unit.

According to the above concept, the front fixing wall of the pad member is provided with two elastic buckles.

According to the above concept, the front barrier wall of the tibial component platform is an integral retaining wall having a central projection, and two recesses for holding the two elastic snaps are formed below the central projection.

According to the above concept, the front retaining wall of the tibial component platform is formed by a plurality of segmented discontinuous retaining walls, and the central two retaining wall segments are higher than the retaining wall segments on both sides, and the two central stops Two grooves for holding the two elastic buckles are formed under the wall segments.

According to the above concept, the rear fixing structure of the tibial component platform is a rear fixing groove, and the rear fixing groove and the two side guiding fixing grooves on both sides are respectively separated by two transition portions.

According to the above concept, the front portion of the pad member has a mounting hole.

Advantageous technical effects of the knee prosthesis of the present invention include:

1. The side guide structure at the bottom of the pad member, the front fixing wall and the rear fixing structure cooperate with the side guiding structure of the upper part of the tibial component platform, the front retaining wall and the rear fixing structure, thereby not only restricting the front, rear, left and right movement of the pad component Position, prevent rotation of the pad member on the tibial component platform, enable peripheral contact locking, and maximize the overall contact area between the pad component and the tibial component platform, thereby enabling the pad component to be more stably locked to the tibia On the component platform.

2. Through the side guiding structure of the pad component and the tibial component platform, the pad component can be implanted into the tibial component platform at a smaller angle, and the implantation opening required for the pad component implantation is reduced, and the operation is more convenient. . DRAWINGS

Figure 1 is a schematic exploded view of the pad member and the tibial component platform of the present invention;

2 is a perspective view of a tibial component platform of a knee joint prosthesis according to a first embodiment of the present invention;

3 is a top plan view of a tibial component platform of a knee joint prosthesis according to a first embodiment of the present invention;

4 is a partial enlarged view of the inner side surface of the tibial component platform of the knee joint prosthesis according to the first embodiment of the present invention; FIG. 5 is a side view of the pad component of the knee joint prosthesis according to the first embodiment of the present invention;

Figure 6 is a front elevational view of a cushion member of a knee joint prosthesis according to a first embodiment of the present invention;

Figure 7 is a bottom plan view of a cushion member of a knee joint prosthesis according to a first embodiment of the present invention;

Figure 8 is a top plan view of a tibial component platform of a knee joint prosthesis according to a second embodiment of the present invention;

9 is a schematic structural view of an inner side surface of a tibial component platform of a knee joint prosthesis according to a second embodiment of the present invention; FIG. 10 is a schematic structural view of a front side surface of a tibial component platform of a knee joint prosthesis according to a second embodiment of the present invention; Figure 11 is a perspective view of a tibial component platform of a knee joint prosthesis according to a second embodiment of the present invention;

Figure 12 is a side elevational view of a cushion member of a knee joint prosthesis according to a second embodiment of the present invention;

Figure 13 is a front elevational view of a cushion member of a knee joint prosthesis according to a second embodiment of the present invention;

Figure 14 is a bottom plan view of a cushion member of a knee joint prosthesis according to a second embodiment of the present invention.

The reference numerals are as follows:

Example:

1 pad component 2 tibial component platform

3 side guide edge 4 rear fixed edge

5 front fixed wall 6 side guide fixing groove

7 rear fixing groove 8 front wall

9 positioning components 10 iliac implanted column

21 mounting holes

Brother 1: Embodiment:

11 Pad component 12 Tibial component platform

13 side guide edge 14 rear fixed edge

15 front fixed wall 16 side guide fixing groove

17 rear fixing groove 18 front wall

181 groove 182 partition 183 groove 19 transition

151 elastic buckle 152 elastic buckle

9 positioning components 10 iliac implanted column

21 Mounting hole 160 Extension part Detailed description

The knee joint prosthesis of the present invention will be described in detail below with reference to the accompanying drawings. The "front" and "rear" directions referred to in the present invention are consistent with the anteroposterior direction of the human body after the knee prosthesis is implanted into the human body.

First embodiment:

As shown in Fig. 1, the knee prosthesis of the present invention comprises a cushion member 1 and a tibial component platform 2. The pad member 1 is fixed to the tibial component platform 2, and the pad member 1 can be locked to the tibial component platform 2 to limit the relative movement between the pad member 1 and the tibial component platform 2.

As shown in FIG. 2 to FIG. 4, the upper part of the tibial component platform 2 of the first embodiment of the present invention has a side guiding structure, a front retaining wall 8 and a rear fixing structure, and the lower part of the tibial component platform 2 further has a tibial implant column 10 and positioning. Part 9. In this embodiment, the side guiding structure of the tibial component platform 2 is preferably a side guiding fixing groove 6 (shown in FIG. 2) which is distributed on both sides of the tibial component platform 2. The side guiding structure can also be a convex side guiding edge.

In this embodiment, the side guiding fixing groove 6 of the tibial component platform 2 further preferably has a diagonal guiding structure, that is, the side guiding fixing groove 6 is inclined at a slight angle α from the back to the front with respect to the tibial component platform 2, the micro angle α is 0 to 10 degrees, preferably 0.5 to 5 degrees. The design of the oblique guiding structure can better guide the insertion of the pad component into the tibial component platform and contribute to a certain stability in the up and down direction. The side guide fixing groove 6 of the tibial component platform 2 can also be set horizontally.

In this embodiment, the front barrier wall 8 of the tibial component platform 2 is an integral retaining wall. The front retaining wall 8 may also be formed by a plurality of segmented discontinuous retaining walls or a spring liftable retaining wall.

In this embodiment, the posterior fixation structure of the tibial component platform 2 is preferably a rear fixation groove 7, which may be a U-shaped groove whose opening is horizontally forward or other similarly shaped groove structure known to those skilled in the art. The rear fixed structure may also be a rear stop wall in the form of a front retaining wall 8. In addition, the rear fixed structure may be an integral design or a segmented discontinuous design.

As shown in Figs. 5 to 7, in order to cooperate with the tibial component platform 2, the bottom of the pad member 1 has a side guiding structure, a front fixing wall 5 and a rear fixing structure.

In the present embodiment, the side guiding structure of the pad member 1 is preferably a convex side guiding edge 3 (see Fig. 6) to cooperate with the side guiding fixing groove 6 of the tibial component platform 2. In addition, when the side guide structure of the tibial component platform 2 is convex The side guiding structure may also be a side guiding fixing groove. Thereby, the side guide structure of the tibial component platform 2 is engaged with the side guide structure of the pad member 1, so that the pad member 1 can be guided from the posterior to the tibial component platform 2. Further, after the pad member 1 is attached to the tibial component platform 2, the side guiding structure of the pad member 1 and the side guiding structure of the tibial component platform 2 are matched, and it is also possible to prevent the pad member 1 from moving left and right and to prevent The function of the pad member 1 to rotate.

In this embodiment, the side guiding edge 3 of the pad member 1 further preferably has a diagonal guiding structure, that is, the side guiding edge 3 is inclined from the rear to the front with respect to the bottom of the pad member 1, the inclination angle and the tibial component. The inclination angles of the side guide grooves 6 of the platform 2 are uniform. When the pad member 1 is mounted to the tibial component platform 2, the oblique guiding structure by the side guiding fixing groove 6 and the oblique guiding structure of the side guiding edge 3 of the pad member 1 are combined and guided to each other, allowing slight tilting The implantation method mounts the cushion member 1 to the tibial component platform 2, thereby greatly reducing the implantation opening required for the insertion of the cushion member 1, while the micro-tilted structural design allows the tibial component to be implanted in the cushion member 1. At the time of the platform 2, since the slightly inclined side guiding structure forms a continuous inclined surface, it has a good guiding effect. Of course, the side guiding edges 3 of the pad member 1 can also be arranged horizontally.

In the present embodiment, the rear fixing structure of the pad member 1 is preferably a convex rear fixing side 4 (see Figs. 5 and 7) for engaging the rear fixing groove 7 of the tibial component platform 2, and this rear fixing The manner in which the side 4 is engaged with the rear fixing groove 7 can greatly enhance the degree of stability (including the stability in the up and down direction) between the pad member 1 and the tibial component platform 2. Further, when the rear fixing structure of the tibial component platform 2 is the rear retaining wall, the rear fixing structure of the cushion member 1 may also be a rear fixing wall. Thereby, the pad member 1 is fixed to the tibial component platform 2 by the front fixing wall 5 and the rear fixing structure of the pad member 1 being engaged with the front wall 8 and the rear fixing structure of the tibial component platform 2, respectively. Further, the rear fixing structure of the pad member 1 may be an integral design or a segmented discontinuous design.

Further, as shown in Fig. 6, the front portion of the spacer member 1 of the present invention has mounting holes 21, and the number of the mounting holes 21 may vary depending on the operational complexity, and is preferably two mounting holes. During the operation, the mounting hole 21 can serve as a structure for the intervention of the instrument. By inserting the instrument into the mounting hole 21, it is easy to apply force to push the pad member 1 into the tibial component platform 2, and it is also advantageous for later revision.

The mounting process of the cushion member 1 and the tibial component platform 2 of the knee prosthesis of the present invention will be described below with reference to the specific embodiments shown in Figs. 2 to 7.

After the tibial component platform 2 is fixed to the proximal end of the tibia by the tibial implant column 10 and the positioning member 9, the instrument is inserted into the mounting hole 21 of the pad member 1 so that the side guiding edge 3 of the pad member 1 is aligned with the tibial component platform 2 The side guide fixing groove 6 allows the pad member 1 to be gradually pushed into the tibial component platform 2 from the front to the rear by the guidance of the side guide edge 3 and the side guide fixing groove 6. Since the tibial component platform 2 is usually a metal material, the pad component 1 is usually an ultra-high polymer. The polyethylene material is sized so that the rear fixed edge 4 and the front fixed wall 5 of the cushion member 1 can finally fall completely into and engage in the rear fixing groove 7 and the front retaining wall 8 of the tibial component platform 2. When the cushion member 1 is fully mounted to the tibial component platform 2 in position, the instrument can be removed from the mounting hole 21 of the cushion member 1, at this time, the side guiding edge 3 of the cushion member 1 and the tibial component platform 2 The side guide fixing grooves 6 are engaged, and the front fixing wall 5 and the rear fixing side 4 of the pad member 1 are respectively engaged with the front wall 8 and the rear fixing groove 7 of the tibial component platform 2, and the pad member 1 and the tibial component platform 2 The overall contact area is maximized so that the pad member 1 can be stably fixed to the tibial component platform 2, and the pad member 1 can remain stationary relative to the tibial component platform 2 when the knee joint undergoes flexion and extension.

The pad member 1 and the side guide structure of the tibial component platform 2 shown in the above embodiments of the present invention are both located on both sides, but the present invention is not limited thereto. The position of the side guide structure of the cushion member 1 and the tibial component platform 2 can be set in the middle. When the side guiding structure is located in the middle of the tibial component platform 2 and the cushion member 1, the other structures and the manner in which the pad member 1 and the tibial plate member 2 are combined are the same as the corresponding portions of the embodiment of the present invention.

Second embodiment:

In the present embodiment, the overall fitting relationship of the tibial component platform 12 and the pad member 11 is the same as that of the first embodiment, the pad member 11 is fixed to the tibial component platform 12, and the pad member 11 can be locked on the tibial component platform 12. The relative movement between the pad member 11 and the tibial component platform 12 is restricted.

As shown in FIG. 8 to FIG. 11, the upper part of the tibial component platform 12 of the second embodiment of the present invention has a side guiding structure, a front retaining wall 18 and a rear fixing structure, and the lower part of the tibial component platform 12 further has a tibial implant column 10 and positioning. Part 9. In this embodiment, the side guiding structure of the tibial component platform 12 is preferably a side guiding fixing groove 16 (as shown in Figs. 9 and 10), and the side guiding fixing groove 16 is distributed on both sides of the tibial component platform 12. As with the first embodiment, the side guiding structure can also be a convex side guiding edge. Different from the first embodiment, in the present embodiment, the side guide fixing groove 16 has a projecting portion 160 extending toward the opposite inner side, that is, the projecting portion 160 is formed by the side guiding fixing groove 6 of the first embodiment. The parts are wider and extend more towards the opposite inner side, making the side guide fixing grooves 16 deeper.

In this embodiment, the side guide fixing groove 16 of the tibial component platform 12 may also have a diagonal guiding structure, which is the same as the first embodiment, to better guide the insertion of the pad member 11 into the tibial component platform 12, and Conducive to a certain stability in the up and down direction. The side guide fixing grooves 16 of the tibial component platform 12 can also be arranged horizontally.

In this embodiment, the front retaining wall 18 of the tibial component platform 12 is preferably an integral retaining wall. As shown in FIGS. 10 and 11, the central portion of the front retaining wall 18 has an upward central projection for projecting in the center. Two grooves 181, 183 are formed below, and between the two grooves 181, 183 are partitions 182, and the grooves 181, 183 function to hold the elastic snaps 151, 152 in the pad member 11.

The front retaining wall 18 may also be formed by a plurality of segmented discontinuous retaining walls, wherein the central two retaining wall segments are higher than two The side wall segments are formed with two retaining wall segments at the center to form two recesses for the resilient snaps 151, 152 in the cushion member 11.

In the present embodiment, the rear fixing structure of the tibial component platform 12 is preferably the rear fixing groove 17, which can be the same as the rear fixing groove 7 of the first embodiment.

Different from the first embodiment, in the embodiment, the rear fixing groove 17 is not connected to the side guiding fixing groove 16, and the rear fixing groove 17 and the two side guiding fixing grooves 16 on both sides are separated by two transition portions 19, respectively. open.

As shown in Figures 12 through 14, in order to cooperate with the tibial component platform 12, the bottom of the cushion member 11 has a side guide structure, a front fixed wall 15 and a rear fixed structure.

In this embodiment, the side guiding structure of the pad member 11 is preferably still a convex side guiding edge 13 (see Figs. 12 and 14) for cooperating with the side guiding fixing groove 16 of the tibial component platform 12, The principle of the mating is also the same as in the first embodiment, and the side guiding edges 13 also preferably have a diagonal guiding structure. In contrast to the first embodiment, in order to accommodate the projecting portion 160 which is widened by the side guide fixing groove 16, the groove between the side guide edge 13 and the pad member 11 is correspondingly deepened.

In the present embodiment, the rear fixing structure of the pad member 11 is preferably a convex rear fixing edge 14 (see Figs. 12 and 14) for engaging with the rear fixing groove 17 of the tibial component platform 12, the cooperation of the two. The relationship is the same as that of the rear fixing groove 7 and the rear fixing side 4 of the first embodiment. Further, the rear fixing structure of the pad member 11 may be an integral design or a segmented discontinuous design. Corresponding to the fact that the rear fixing groove 17 of the tibial component platform 12 and the side guiding fixing groove 16 are not connected, the side guiding edge 13 of the pad member 11 is not connected to the rear fixing edge 14, and may be separated by the transition portion.

Further, as shown in FIGS. 13 and 14, the front fixing wall 15 of the pad member 11 is provided with elastic snaps 151, 152, for example, hollowed out in the front fixing wall 15, and then set in the hollowed out portion. The elastic snaps 151, 152, the elastic snaps 151, 152 snap into the front stop wall 18 and the recesses 181, 183 of the tibial component platform 12 to better secure the cushion member 11 to the tibial component platform 12.

Further, as shown in Fig. 13, in the present embodiment, the front portion of the pad member 11 has mounting holes 21, and the number and function of the mounting holes 21 are the same as those of the first embodiment.

The mounting process of the cushion member 11 and the tibial component platform 12 of the knee joint prosthesis of the second embodiment of the present invention will be described below with reference to Figs. 8 to 14 .

After the tibial component platform 12 is secured to the proximal end of the tibia by the tibial implant column 10 and the positioning member 9, the instrument is inserted into the mounting hole 21 of the pad member 11 such that the lateral guiding edge 13 of the pad member 11 is aligned with the tibial component platform 12. The side guides the fixing groove 16, so that the pad member 11 can be gradually pushed into the tibial component platform 12 from the front to the rear by the guidance of the side guide edge 13 and the side guide fixing groove 16. Since the tibial component platform 12 is typically a metallic material, the cushioning component 11 is typically an ultra high molecular weight polyethylene material, so that the rear fixed edge 14 of the cushioning component 11 can ultimately be completely collapsed and engaged. In the rear fixing groove 17 of the tibial component platform 12, the elastic snaps 151, 152 of the front fixing wall 15 are completely caught in the grooves 181, 183 of the front retaining wall 18 of the tibial component platform 12. When the cushion member 11 is fully mounted to the tibial component platform 12 in position, the instrument can be removed from the mounting hole 21 of the cushion member 11, at which time the overall contact area of the cushion member 11 and the tibial component platform 12 is maximized. Thereby, the pad member 11 can be stably fixed to the tibial component platform 12, and the pad member 11 can also remain stationary with respect to the tibial component platform 12 when the knee joint undergoes flexion and extension.

In combination with the above two embodiments, the beneficial technical effects of the knee prosthesis of the present invention include:

1. The side guide structure through the bottom of the pad members 1, 11, the front fixing walls 5, 15 and the rear fixing structure and the side guiding structures of the upper part of the tibial component platforms 2, 12, the front retaining walls 8, 18 and the rear fixing structure Cooperating, not only restricts the front, rear, left and right displacement of the cushion members 1, 11, prevents the rotation of the cushion members 1, 11 on the tibial component platforms 2, 12, enables peripheral contact locking, and the cushion members 1, 11, and the tibia The overall contact area between the component platforms 2, 12 is maximized so that the cushion members 1, 11 can be more stably locked to the tibial component platforms 2, 12.

2. The pad members 1, 11 can be implanted into the tibial component platform at a smaller angle by the pad members 1, 11 and the side guiding structures of the tibial component platforms 2, 12, reducing the pad components 1, 11 The implanted opening required for entry is more convenient to operate.

3. By the cooperation between the elastic snaps 151, 152 and the grooves 181, 183, the pad member 11 is better fixed to the tibial component platform 12, and is easy to operate.

The present invention is directed to an improvement in the fit between the tibial component platform and the cushion component. The other components of the knee prosthesis are the same as in the prior art and will not be described again herein.

The above is only the detailed description and the drawings of the preferred embodiments of the present invention, and the features of the present invention are not limited thereto, and all the scope of the present invention shall be subject to the following scope, which is in accordance with the claims of the present invention. The spirit of the scope of the protection and the similarly modified embodiments are intended to be included in the scope of the present invention. Any changes or adjustments that can be easily conceived by those skilled in the art within the scope of the present invention can be encompassed by the present invention. Within the scope of the claims.

Claims

Rights request

A knee prosthesis having a cushion member (1, 11) and a tibial component platform (2, 12) characterized by:

The pad member (1, 11) has a side guiding structure, a front fixing wall (5, 15) and a rear fixing structure at the bottom; the upper part of the tibial component platform (2, 12) has the pad member (1) 11) compatible side guiding structures, front retaining walls (8, 18) and rear fixed structures;

The side guiding structure of the tibial component platform (2, 12) cooperates with the side guiding structure of the pad component (1, 11) to guide the pad component (1, 11) from the rear to the rear On the tibial component platform (2, 12); and, after the pad component (1, 11) is mounted on the tibial component platform (2, 12), the pad component (1, 11) The front fixed wall (5, 15) and the rear fixed structure are respectively engaged with the front retaining walls (8, 18) and the rear fixed structure of the tibial component platforms (2, 12), thereby causing the cushion member (1) 11) is fixed on the tibial component platform (2, 12).

2. The knee prosthesis according to claim 1, wherein the side guiding structure of the pad member (1) is a convex side guiding edge (3), and the side guiding of the tibial component platform (2) The structure is a side guiding fixing groove (6);

Alternatively, the side guiding structure of the pad member (1) is a side guiding fixing groove, and the side guiding structure of the tibial component platform (2) is a convex side guiding edge.

The knee joint prosthesis according to claim 1, wherein the rear fixing structure of the pad member (1) is a rear fixing wall, and the rear fixing structure of the tibial component platform (2) is a rear blocking wall;

Alternatively, the rear fixing structure of the pad member (1) is a convex rear fixing edge (4), and the rear fixing structure of the tibial component platform (2) is a rear fixing groove (7).

The knee joint prosthesis according to claim 2, wherein the side guiding structure of the pad member (1) and the side guiding structure of the tibial component platform (2) are both inclined from the rear to the front.

The knee joint prosthesis according to claim 4, wherein the angle of the inclination is 0 to 10 degrees.

The knee joint prosthesis according to claim 5, wherein the angle of the inclination is 0.5 to 5 degrees.

7. The knee prosthesis according to claim 1, wherein the front barrier wall (8) of the tibial component platform (2) is an integral barrier wall or is formed by a plurality of segmented discontinuous barrier walls, or The spring can lift the wall.

The knee joint prosthesis according to claim 1, wherein the rear fixing structure of the pad member (1) and the rear fixing structure of the tibial component platform (2) are both integral or multiple Segmented discontinuous structures are formed.

9. The knee prosthesis according to claim 1, wherein a side guiding structure of the pad member (1) is located on both sides or a middle portion of a bottom portion of the pad member (1), and the tibial component platform ( 2) the side guiding structure is located with the lining The position of the side guiding structure of the pad member (1).

10. The knee prosthesis according to claim 1, wherein the side guiding structure of the pad member (11) is a convex side guiding edge (13), and the side guiding of the tibial component platform (12) The structure is a side guide fixing groove (16) having a projecting portion (160) extending toward the opposite inner side.

The knee joint prosthesis according to claim 1, wherein the front fixing wall (15) of the pad member (11) is provided with two elastic snaps (151, 152).

The knee prosthesis according to claim 11, wherein the front barrier wall (18) of the tibial component platform (12) is an integral retaining wall having a central projection, the lower portion of the central projection being formed There are two grooves (181, 183) for holding the two elastic buckles (151, 152).

13. The knee prosthesis of claim 11 wherein the front barrier wall (18) of the tibial component platform (12) is formed as a plurality of segmented discontinuous barriers and the central two barrier segments are Above the two side wall segments, two recesses for holding the two elastic buckles (151, 152) are formed under the two central wall segments.

The knee prosthesis according to claim 10, wherein the posterior fixation structure of the tibial component platform (12) is a rear fixation groove (17), the rear fixing groove (17) and two sides of the two sides The side guide fixing grooves (16) are respectively separated by two transition portions (19).

The knee joint prosthesis according to any one of claims 1 to 14, wherein the front portion of the pad member (1, 11) has a mounting hole (21).