Artificial elbow joint surface replacement prosthesis

Abstract

The invention discloses an artificial elbow joint surface replacement prosthesis. The prosthesis comprises a prosthesis part matched in shape with distal humerus and mounted at the distal humerus, as well as an internal fixed steel plate and an external fixed steel plate which are connected with the prosthesis part and fixed to an inner side column and an outer side column of the humerus respectively, wherein the prosthesis part adopts a hollow cylinder-like structure; the external shape of the prosthesis part is the same as the joint surface shape of the distal humerus; the external contact surface of the prosthesis part is a smooth coating surface and is in contact with the joint surface of proximal ulna; and a first connecting part and a second connecting part are arranged at one end, connected with the prosthesis part, of the inner fixed steel plate and positioned in two perpendicular planes respectively. According to the prosthesis, the bone mass loss caused by operations of wide-range dissection of soft tissues around elbow joint, osteotomy, marrow expansion and the like in a prosthesis replacement process can be avoided, the prosthesis loose of an insertion-type prosthesis can be avoided, and the incidence rate of deep infection caused by intramedullary operation can be reduced.

Description

technical field [0001] The invention relates to the technical field of artificial elbow joint prosthesis, in particular to an artificial elbow joint surface replacement prosthesis. Background technique [0002] The elbow joint is a complex joint in the human body, and its biological functions of flexion, extension and rotation are of great significance to human activities. Elbow joint prosthesis replacement is suitable for severe damage to the joint structure, and the limited surgery that preserves the autologous tissue structure is difficult to achieve the ideal correction effect. The design of the elbow joint prosthesis must take into account the functional anatomy and biomechanics of the elbow. Chinese patents CN1121847C, CN2659380Y and CN201879868U disclose artificial prostheses of several elbow joints respectively. These types of prosthesis mainly include the humeral component and the ulnar component. The above-mentioned components are composed of a stem part and a joi...

AI Technical Summary

Problems solved by technology

[0003] The existing artificial elbow joint prosthesis is a total elbow joint replacement prosthesis. During the prosthetic replacement process, the soft tissue around the elbow joint will be extensively stripped, causing relatively large trauma. Osteotomy and marrow reaming are required during the operation, resulting in bone loss. lost

In addition, complications such as prosthesis loosening, instability, and failure of prosthetic components are prone to occur after prosthesis replacement, and the revision rate is high

Severe infection after prosthetic replacement will lead to surgical failure and irreparable impact on the affected elbow

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