CN212730078U

CN212730078U - Anatomical knee joint tibia platform pad

Info

Publication number: CN212730078U
Application number: CN202020629451.2U
Authority: CN
Inventors: 解凤宝; 史春宝; 韩川
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-03-19
Anticipated expiration: 2030-04-23

Abstract

The invention relates to an anatomical knee joint tibia platform pad which comprises a pad body, wherein upright posts protruding upwards are arranged on the pad body; the pad body is divided into a platform inner side and a platform outer side by the upright posts, the top surface of the platform inner side and the top surface of the platform outer side are both in a curved surface shape with a convex inner concave edge, and the platform inner side is further concave towards the pad body relative to the platform outer side; the cushion body is fixedly connected with the tibial platform support in a clamping way. The invention has the effect of better fitting with the human body.

Description

Anatomical knee joint tibia platform pad

Technical Field

The invention relates to the technical field of medical instruments, in particular to an anatomical knee joint tibia platform pad.

Background

The knee joint mostly adopts the design of symmetrical femoral condyle, tibial plateau pad and tibial plateau support, and the combination of symmetrical femoral condyle and tibial plateau pad.

The above scheme has the following disadvantages: the artificial knee joint prosthesis is not in accordance with anatomical features of a human body, soft tissues on two sides of the knee joint are easy to unbalance in flexion and extension states, problems of unstable joints, improper force lines, poor postoperative functions, incapability of meeting the requirement of physiological movement in flexion and extension movement and the like can be caused, and proprioception of the knee joint and the survival rate of the prosthesis are influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an anatomical knee joint tibial plateau pad which is more consistent with the anatomical characteristics of a human body.

The above object of the present invention is achieved by the following technical solutions:

an anatomical knee joint tibia platform pad comprises a pad body, wherein upright posts protruding upwards are arranged on the pad body; the pad body is divided into a platform inner side and a platform outer side by the upright posts, the top surface of the platform inner side and the top surface of the platform outer side are both in a curved surface shape with a convex inner concave edge, and the platform inner side is further concave towards the pad body relative to the platform outer side; the cushion body is fixedly connected with the tibial platform support in a clamping way.

By adopting the technical scheme, the eversion of the top surface of the cushion body is realized by utilizing the bionics in design, so that the femoral condyle matched with the cushion body is everted, a physiological joint line is reconstructed, the soft tissues at two sides are better balanced, and the characteristics of human anatomy type are better met; the bionic design of the tibial platform pad, concave and convex, reappear the physiological state of the meniscus of the knee joint, accord with the motion characteristics of the human body, and the tibial platform is concave in front so as to recover the normal initial AP position of the natural knee joint, prevent abnormal motion, simulate the motion of the normal knee joint and maximize deep flexion.

The present invention in a preferred example may be further configured to: the connecting line between the maximum curvature point at the inner side of the platform and the maximum curvature point at the outer side of the platform forms an included angle of 3 degrees with the horizontal plane.

By adopting the technical scheme, in the normal physiological movement process of the knee joint of a human body, the femoral condyle and the tibia present a 3-degree joint line, and the anatomical feature of the tibia is the characteristic of being concave and convex, so that the balance of soft tissue ligaments on two sides of the knee joint is facilitated.

The present invention in a preferred example may be further configured to: the top surface of the upright post is in smooth inclined curved surface transition towards the side wall of the upright post.

Through adopting above-mentioned technical scheme, when the user bends the knee action, the thighbone condyle can take place to rotate and the displacement for tibial plateau pad, because closed end and stand contact before the condyle slot when the user stands the state vertically, so the stand can produce the friction with closed end before the condyle slot when bending the knee, and the stand apical surface is smooth slope curved surface form transition towards its lateral wall and can reduce the friction between closed end before stand and the condyle slot, has protected stand and thighbone condyle, has reduced the abnormal sound.

The present invention in a preferred example may be further configured to: a ligament groove for accommodating the ligament is arranged at the middle position of the cushion body.

Through adopting above-mentioned technical scheme, ligament confession accommodation space of knee joint department can be for prior art in the setting of ligament groove, and when the high bucking of knee joint, the ligament of knee joint department can lean on to knee joint prosthesis department, and the ligament groove can provide the space of dodging, alleviates the friction between ligament and the knee joint prosthesis, has prolonged knee joint prosthesis's life, has protected the ligament simultaneously.

The present invention in a preferred example may be further configured to: one side of the side wall of the cushion body, which is back to the tough belt groove, is inwards sunken to form a half-bracket-shaped avoiding groove.

By adopting the technical scheme, the arrangement of the avoiding groove ensures that the cushion body can maintain the high contact area of the femoral-glenoid surface when the knee joint is highly flexed while maintaining the sufficient contact area with the tibia, and the high contact area is maintained at approximately the same height when the knee joint is flexed and straightened, so that the abrasion of the glenoid surface and the stimulation to the surrounding soft tissues are reduced.

The present invention in a preferred example may be further configured to: the top surfaces of the inner side and the outer side of the platform are both concave forwards in the same direction.

By adopting the technical scheme, the tibial plateau is anterior concave, so that the normal initial AP position of the natural knee joint can be recovered, and abnormal movement is prevented.

The present invention in a preferred example may be further configured to: the bottom surface of the cushion body is fixedly provided with a locking mechanism with the top concave and the bottom convex.

Through adopting above-mentioned technical scheme, can strengthen and fill up the joint strength between the body with filling up the tibial plateau support that the body cooperation was used for tibial plateau fills up and has higher joint strength and connection stability between tibial plateau support, reduces gasket fine motion and back wearing and tearing by a wide margin.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the arrangement of the locking mechanism can enhance the connection strength between the tibial platform support matched with the pad body and the pad body, so that the tibial platform pad and the tibial platform support have higher connection strength and connection stability, and the micromotion and back abrasion of the pad are greatly reduced;

2. the eversion of the top surface of the cushion body is realized by utilizing bionics in design, so that the femoral condyle matched with the cushion body is everted, a 3-degree physiological joint line is reconstructed, the soft tissues at two sides are better balanced, and the characteristics of human anatomy type are better met; the bionic design of the tibial platform support, the inner concave part protrudes outwards, the physiological state of the meniscus of the knee joint is reproduced, the motion characteristics of a human body are met, the tibial platform is concave forwards, the normal starting AP position of the natural knee joint is restored, abnormal motion is prevented, normal knee joint motion is simulated, and deep buckling is maximized.

Drawings

FIG. 1 is a schematic structural view of an embodiment;

fig. 2 is a schematic view of a ridge structure in the embodiment.

In the figure, 1, a cushion body; 11. a column; 12. an inclined plane part; 13. the inner side of the platform; 14. the outer side of the platform; 15. a locking mechanism; 16. convex edges; 17. a tough belt groove; 18. avoiding the groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 and 2 show an anatomical knee joint tibia platform pad disclosed by the invention, which comprises a pad body 1. The middle position of the top surface of the cushion body 1 is fixedly provided with an upright post 11 protruding towards the inner part of the intercondylar groove, the upright post 11 is used for matching with the intercondylar groove on the femoral condyle to play the role of an anterior-posterior cruciate ligament, the top surface of the upright post 11 is in smooth inclined curved surface-shaped transition towards the side wall thereof, and an inclined surface part 12 is formed on the side wall thereof. The cushion body 1 is divided into a platform inner side 13 and a platform outer side 14 by the upright post 11, the top surface of the platform inner side 13 and the top surface of the platform outer side 14 are both in a curved surface shape with a convex inner concave edge, and the platform inner side 13 is further concave towards the inside of the cushion body 1 relative to the platform outer side 14. The connecting line between the maximum curvature point of the inner side 13 of the platform and the maximum curvature point of the outer side 14 of the platform forms an included angle of 3 degrees with the horizontal plane, and the top surfaces of the inner side 13 and the outer side 14 of the platform are both concave forwards towards the direction of the inclined plane part 12. The sidewall of the cushion body 1 right below the inclined plane part 12 is provided with a tough belt groove 17 for accommodating ligaments, and the central point of the tough belt groove 17, the central point of the cushion body 1 and the central point of the upright post 11 are positioned on the same vertical plane. One side of the side wall of the cushion body 1, which is back to the tough belt groove 17, is inwards sunken to form a half-bracket-shaped avoiding groove 18. The bottom surface of the cushion body 1 is fixedly provided with a locking mechanism 15 with the top part being concave and the bottom part being convex, the locking mechanism 15 in the embodiment comprises a convex edge fixedly arranged on the bottom surface of the cushion body 1, the convex edge is positioned on one side of the cushion body 1 provided with an avoiding groove 18, and the side wall of the convex edge back to the tough groove 17 is in a smooth curved surface shape.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides an anatomical form knee joint shin bone platform pad, includes the pad body (1), its characterized in that: the pad body (1) is provided with an upright post (11) which protrudes upwards; the cushion body (1) is divided into a platform inner side (13) and a platform outer side (14) by the upright column (11), the top surface of the platform inner side (13) and the top surface of the platform outer side (14) are both in a curved surface shape with a convex inner concave edge, and the platform inner side (13) is further concave towards the inside of the cushion body (1) relative to the platform outer side (14); the cushion body (1) is fixedly connected with the tibial platform support in a clamping way.

2. The anatomic knee tibial plateau pad of claim 1, wherein: the connecting line between the maximum curvature point of the inner side (13) of the platform and the maximum curvature point of the outer side (14) of the platform forms an included angle of 3 degrees with the horizontal plane.

3. The anatomic knee tibial plateau pad of claim 1, wherein: the top surface of the upright post (11) is in smooth transition in a shape of an inclined curved surface to the side wall of the upright post.

4. The anatomic knee tibial plateau pad of claim 1, wherein: a ligament groove (17) for accommodating the ligament is arranged at the middle position of the cushion body (1).

5. The anatomic knee tibial plateau pad of claim 4, wherein: the center point of the tough belt groove (17), the center point of the cushion body (1) and the center point of the upright post (11) are positioned on the same vertical plane.

6. The anatomic knee tibial plateau pad of claim 1, wherein: one side of the side wall of the cushion body (1), which is back to the tough belt groove (17), is inwards sunken to form a half-bracket-shaped avoiding groove (18).

7. The anatomic knee tibial plateau pad of claim 1, wherein: the top surfaces of the inner side (13) and the outer side (14) of the platform are both concave forwards in the same direction.

8. The anatomic knee tibial plateau pad of claim 1, wherein: the bottom surface of the cushion body (1) is fixedly provided with a locking mechanism (15) with the concave top and the convex bottom.