Elbow joint replacement prosthesis

Abstract

The invention relates to the technical field of medical apparatus and instruments, and provides an elbow joint replacement prosthesis. The elbow joint replacement prosthesis comprises an ulna handle and a humerus handle, wherein the ulna handle and the humerus handle can relatively rotate; an ulna liner is installed in the round hole of an ulna handle connecting end; the humerus handle is providedwith two round connecting parts; the inner side of the round hole of each round connecting part is independently provided with a humerus liner; a bayonet lock cover penetrates through the ulna linerand the two humerus liners and is clamped with one humerus liner; a bayonet lock penetrates through the bayonet lock cover; and the front end clamping hook of the bayonet lock is cooperated with the bottom surface of the groove of the bayonet lock cover. The elbow joint replacement prosthesis has the beneficial effects that the ulna handle and the humerus handle are in spherical surface semi-restricted connection, when the ulna handle and the humerus handle are prevented from vertically shaking, the ulna handle and the humerus handle can rotate and shake at a certain angle to disperse shearingstress, and a situation that a bone / bone cement / prosthesis interface becomes flexible due to the conducted shearing stress is avoided.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and more specifically relates to an elbow joint replacement prosthesis. Background technique [0002] Elbow joint prosthesis is a surgical implant used in elbow joint replacement to replace the elbow joint of human patients. At present, the existing elbow prosthesis mainly consists of a humeral prosthesis, an ulnar prosthesis, a joint shaft locking nail and a shaft sleeve. The humeral prosthesis is used to connect with the humerus of the human body, the ulnar prosthesis is used to connect with the ulna of the human body, and the joint shaft locking nail is used to connect the ends of the humeral prosthesis and the ulnar prosthesis so that the two can rotate relative to each other to achieve elbow joint. For the movable function of the joint prosthesis, the bushing is set between the humeral prosthesis and the joint shaft locking nail, and between the ulnar prosthesis and the joint sh...

AI Technical Summary

Problems solved by technology

However, to a certain extent, this also caused a large shaking problem between the ulnar prosthesis and the humeral prosthesis, which easily caused the loosening of the humeral prosthesis or the ulnar prosthesis, and reduced the connection stability of the elbow joint prosthesis

Even when the gap is large, it is easy to cause the wear of the articular surface at the elbow joint of the human body

[0004] In addition, the humeral stem of the prior art still has a large stress during use and is easily broken and damaged. A new elbow joint replacement prosthesis is urgently needed to solve the above problems

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