WO2013067859A1

WO2013067859A1 - Buffering surface-type knee joint

Info

Publication number: WO2013067859A1
Application number: PCT/CN2012/081706
Authority: WO
Inventors: 黄国富
Original assignee: 天津衡康医疗器械有限公司
Priority date: 2011-11-07
Filing date: 2012-09-20
Publication date: 2013-05-16
Also published as: CN202313810U

Abstract

A buffering surface-type knee joint is formed by connecting a femoral condyle prosthesis (1), a butterfly movable platform (2), a butterfly tibia platform prosthesis base (3), a tibia platform implant (4) and a buffer vibration absorber (3.3, 3.4, 3.5), which is installed on the butterfly tibia platform prosthesis base (3);reinforcing ribs (1.1) are arranged at the inner surface of the femoral condyle prosthesis (1), and a pair of bone grafting cabins (1.2) is symmetrically arranged at the rear end of the femoral condyle prosthesis (1);an ultra-radius spherical hole (2.1) is arranged at the middle bottom of the butterfly movable platform (2); a spherical pile (3.1), a limit post (3.2) and a shock damper hole (3.6) are arranged on the butterfly tibia platform prosthesis base (3),charactered in that the implant at the bottom center of the butterfly tibia platform prosthesis base (3) is cylindrical, the tibia platform implant (4) is in a hollow cylindrical wall porous structure, and a screwed hole is arranged at the horizontal plane of the upper end of the hollow cylindrical wall porous structure. The buffering surface-type knee joint reduces the contrecoup stress which is generated between the moving prostheses effectively, prolongs the service life of the prostheses, and has the characteristic of good stability.

Description

Buffered surface knee joint

Technical field

The utility model relates to an artificial joint for orthopedics, in particular to a cushion type surface type knee joint.

Background art

At present, the use of artificial joints in orthopedics is widely used, solving the problems of many orthopedic patients. However, the existing artificial knee joint has no cushioning function, and the impact of the hard joint between the book joint prosthesis is easy to wear the joint. In artificial knee joint surgery, because of the large platform osteotomy, the osteotomy is large and the damage is large, resulting in poor bone implanting effect, easy to produce an interface, resulting in loose joints.

Summary of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a cushioned surface type knee joint which is reasonable in design, reduces hard collision between joint prostheses and has good bone planting effect.

The utility model solves the technical problem by adopting the following technical solutions: a cushioning surface type knee joint, a femoral condyle prosthesis, a butterfly-like active platform surface, a butterfly-shaped tibial plateau prosthesis base, and a tibial plateau implant And a shock absorber connected to the base of the sacral tibial plateau prosthesis; the inner side of the femoral condyle prosthesis is provided with a reinforcing rib for preventing deformation of the femoral condyle prosthesis, and a pair of plants are symmetrically arranged at the rear end The middle bottom surface of the butterfly-shaped movable platform surface is provided with a super-radius spherical hole; the front end of the front end of the butterfly-shaped tibial plateau prosthesis base is provided with a spherical pile with a smooth surface, at the front end of the spherical pile Symmetrically, a pair of limiting rods capable of functioning as a joint to limit the spin function, and a pair of shock absorber holes for mounting a shock absorber at the rear end of the spherical pile, the butterfly sacral platform The bottom center implant of the prosthetic base is in the shape of a flower tube; the tibial plate implant is a porous structure of the hollow column wall and has a spiral hole at the upper end level.

Moreover, the femoral condyle prosthesis is a femoral internal and external bimodal interconnected flexure trajectory 130 Moreover, the front end of the femoral condyle prosthesis has a sliding surface or a non-sliding surface.

Further, the shock absorber is composed of a buffer column, a buffer body and a cushioning material, and the buffer column is attached to the upper end of the buffer body, and the cushioning material is installed in the buffer body.

Moreover, the butterfly movable platform surface is made of an ultra-high molecular material.

Moreover, the bottom surface of the sphenoidal tibial plateau prosthesis base is made of a metal material. The advantages and positive effects of the utility model are:

1. The utility model is based on the special physiological function movement and biomechanical characteristics of the human knee joint, and adopts the principle of motion simulation mechanical combination, so that the anatomical relationship of the anterior iliac crest can better maintain its integrity, and is also the current surgical bone removal type. The minimally designed surgical design preserves the anterior tibial bone tissue without excessive removal due to the replacement of the prosthesis, solving the problems of the prior art.

2. The end of the platform of the utility model has a unique elastic buffer device, which effectively reduces the impact stress generated during the movement between the prosthesis, thereby playing the joint motion buffer, reducing the friction coefficient and prolonging the The life of the prosthesis.

3. The utility model solves the problem of bone inlay through the tibial plate implant, so that the prosthesis is not easy to loose after implantation, has good stability, and has a biological planting function.

4. The utility model is more in line with the kinematics requirements of the knee joint, and further improves the medical effect.

DRAWINGS

1 is a schematic view of the overall exploded structure of the present invention;

Among them: 1 is the femoral condyle prosthesis; 1. 1 is the reinforcing tendon; 1. 2 is the bone grafting bin; 2 is the disc-shaped active platform surface; 2. 1 is the spherical hole; 3 is the butterfly-shaped tibial plateau prosthesis base 3. 1 is a spherical pile; 3. 2 is a limit column; 3. 3 is a buffer column; 3. 4 is a buffer body; 3. 5 is a buffer material; 3. 6 is a shock absorber hole; 4 is a tibial plateau Implants.

detailed description

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings: A cushioned surface type knee joint, as shown in Figure 1, consists of a femoral condyle prosthesis 1, a butterfly-like active platform surface 2, a butterfly-like tibial plateau prosthesis base 3, a tibial plateau implant 4, and a butterfly-like structure. The shock absorber connection on the base of the tibial plateau prosthesis is constructed. The femoral condyle prosthesis 1 is a structure in which the internal and external femoral condyle flexion trajectory is 130 °. The front end of the femoral condyle prosthesis 1 has a sliding surface or a non-sliding surface, and the inner side of the femoral condyle prosthesis 1 is provided. 5。 The anterior symmetry of the femoral condyle 1 is symmetrical. 1。 The butterfly-shaped movable platform surface 2 is made of a super-polymer material, wherein the bottom surface is provided with a super-radius spherical hole 2.1. The sphenoidal tibial plateau prosthesis base 3 has a butterfly shape, and the bottom surface of the sacral tibial plateau prosthesis base 3 is made of a metal material, and the front end of the sacral tibial plateau prosthesis base 3 is located at the center. The ball-shaped pile with a smooth surface 3. 1, the spherical pile 3.1 can form a super-radius interactive concave-convex fit with the bottom of the corresponding butterfly-like movable platform surface 2, and a pair of can be symmetrically mounted at the front end of the spherical pile 3.1 2之间。 In the rear end of the spherical pile 3.1 is symmetrically provided with a pair of shock absorber holes for mounting the shock absorber 3. 6 in the pair of shock absorbers A buffer shock absorber can be installed in the hole 3.6, and the bottom center implant of the pterygopalatine prosthesis base 3 is in a flower-like shape. The tibial plateau implant 4 is a porous structure of a hollow column wall and has a spiral hole at its upper end horizontal surface. The tibial plateau implant 4 is mounted on a flower-shaped implant at the bottom of the sacral tibial plateau prosthesis base 3. . The installation of the cushioning material is 3. 3, the buffering material is 3. 3, the buffering material is 3. In the buffer body 3.4.

It should be emphasized that the embodiments of the present invention are illustrative and not limiting, and thus the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art according to the present invention Other embodiments resulting from the technical solution are also within the scope of protection of the present invention.

Claims

Claim

1. A cushioned surface type knee joint consisting of a femoral condyle prosthesis, a butterfly-like active platform surface, a butterfly-like tibial plateau prosthesis base, a tibial plateau implant, and a pedicle of a sacral tibial plateau prosthesis. The shock absorber connection structure is characterized in that: the inner side surface of the femoral condyle prosthesis is provided with a reinforcing rib for preventing deformation of the femoral condyle prosthesis, and a pair of bone grafting chambers are symmetrically arranged at the rear end; the butterfly activity The middle bottom surface of the platform surface is provided with a super-radius spherical hole; the front end of the front end of the butterfly-shaped tibial plateau prosthesis base is provided with a spherical pile with a smooth surface, and a pair of symmetrically mounted on the front end of the spherical pile can serve as a joint limit A limit column of the spin function of the position, symmetrically disposed at the rear end of the spherical pile, a pair of shock absorber holes for mounting the shock absorber, the bottom center of the base of the sacral tibial base prosthesis The body is in the shape of a flower tube; the tibial plateau implant is a porous structure of a hollow column wall and has a spiral hole at a water level at its upper end.

2. The cushioned surface type knee joint according to claim 1, wherein: the femoral condyle prosthesis is a structure in which the internal and external bifurcations of the femoral condyle are 130 °.

The cushioning surface type knee joint according to claim 1 or 2, wherein: the front end of the femoral condyle prosthesis has a sliding surface or a non-sliding surface.

4. The cushioning surface type knee joint according to claim 1, wherein: the shock absorber is composed of a buffer column, a buffer body and a buffer material, and the buffer column is installed at an upper end of the buffer body, the buffer The material is mounted in a buffer.

5. The cushioning surface type knee joint according to claim 1, wherein: the butterfly movable platform surface is made of an ultra-high molecular material.

6. The cushioning surface type knee joint according to claim 1, wherein: the bottom surface of the sacral tibial plateau prosthesis base is made of a metal material.