A kind of artificial elbow joint surface replacement prosthesis

Abstract

The invention discloses an artificial elbow joint surface replacement prosthesis, which comprises: a prosthesis part that matches the shape of the distal end of the humerus and is placed on the distal end of the humerus; The internal fixation plate and external fixation plate of the lateral column; the prosthesis part is a hollow cylindrical structure, the external shape of the prosthesis part is the same as the articular surface shape of the distal humerus, and the external contact surface is a smooth coating surface and is compatible with the ulna The proximal end is in contact with the articular surface; the end of the internal fixation steel plate connected to the prosthetic part has a first connection part and a second connection part, and the first connection part and the second connection part are respectively located in two mutually perpendicular planes. The present invention can avoid the loss of bone mass caused by extensive stripping of soft tissue around the elbow joint, osteotomy, reaming and other operations in the process of prosthesis replacement, can avoid the prosthesis loosening of the inserted prosthesis, and can also reduce the The incidence of deep infection caused by the operation.

Description

technical field [0001] The invention relates to the technical field of artificial elbow joint prostheses, in particular to an artificial elbow joint surface replacement prosthesis. Background technique [0002] The elbow joint is a complex joint of the human body, and its biological functions of flexion, extension and rotation are of great significance to human activities. Elbow prosthesis replacement is suitable for severe damage to the joint structure, and when the limited operation of preserving the autologous tissue structure is difficult to achieve the ideal corrective 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 respectively disclose several artificial prostheses for elbow joints. These types of prostheses mainly include humerus components and ulna components. The above components are composed of a stem body part and a joint part. Th...

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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