A kind of modular shoulder joint prosthesis and its manufacturing method

Abstract

The invention provides a modular shoulder joint prosthesis and its manufacturing method, which includes: a scapular prosthesis, a glenoid prosthesis and a humeral prosthesis, the glenoid strut free end of the glenoid prosthesis is connected to the glenoid prosthesis The glenoid part of the scapula prosthesis is movable and pivotally arranged, and the glenoid inner sleeve of the glenoid prosthesis is set in the articulation groove of the humeral head of the humerus prosthesis; and the outer wall of the humerus stem is covered with a bone beam structure. In this way, a complete set of scapular prosthesis, glenoid prosthesis and humeral prosthesis can be provided, which can meet the needs of patients with damaged humerus, glenoid and scapula, and also truly simulate the relationship between the human scapula and glenoid. The relative activity relationship between them, and the outer wall of the humeral stem is covered with a bone trabecular structure, so that human tissue can be quickly and firmly attached to the prosthesis, and it solves the problem of easy loosening of the prosthesis caused by bone cement and the release of the monomer during polymerization. A large amount of heat causes problems such as damage to surrounding tissues.

Description

technical field [0001] The invention relates to the technical field of shoulder joint replacement, in particular to a modular shoulder joint prosthesis and a manufacturing method thereof. Background technique [0002] The shoulder joint is the most flexible joint in the human body. Its main function is to perform flexion, extension, abduction, adduction, external rotation and internal rotation. Therefore, the shoulder joint is an important part of the human body. When the shoulder joint is damaged, in order to reduce the pain of the patient and ensure that the patient can live a normal life in the future, the treatment plan of shoulder joint prosthesis replacement is generally adopted. In the collection of a large number of case plans, it was found that a large proportion of shoulder joint treatment patients had damage to the scapula, glenoid and humerus, requiring overall replacement, but the humeral prosthesis and scapular prosthesis in the existing shoulder joint prosthes...

AI Technical Summary

Problems solved by technology

In the collection of a large number of case plans, it was found that a large proportion of shoulder joint treatment patients had damage to the scapula, glenoid and humerus, requiring overall replacement, but the humeral prosthesis and scapular prosthesis in the existing shoulder joint prosthesis are separate Existence, the humeral shoulder joint is implanted independently with the intact scapula, and the scapula is also implanted independently with the intact humerus, so it cannot meet the needs of simultaneous treatment and replacement of patients with overall shoulder joint damage. In addition, the existing humeral stem of the shoulder joint All replacements are cement-type implants, but bone cement is an inert material, and long-term fretting will cause prosthesis loosening, and bone cement monomers can release a lot of heat when they polymerize, causing damage to surrounding tissues

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