Artificial shoulder joint prosthesis

Abstract

The invention discloses an artificial shoulder joint prosthesis. The artificial shoulder joint prosthesis comprises a prosthesis handle, a connecting neck and a prosthesis head, wherein a ball socket is arranged on an upper end surface of the prosthesis handle; the connecting neck is provided with a connecting column, a tray and an expansion ball which are integrated into a whole from top to bottom; a convex column is arranged beside the connecting column on the tray; a ball body of the expansion ball is in a crack shape; the expansion ball and the ball socket are matched to form a spherical hinge structure; an expansion screw is screwed into the ball body of the expansion ball from a countersink part; the ball body of the expansion ball generates a frictional bond stress with the ball socket after being expanded, so as to fixedly connect the expansion ball with the prosthesis handle; the prosthesis head is a spherical crown body and comprises a bottom surface and a highly polished spherical surface; a connecting hole is eccentrically arranged in the bottom surface; a circle of adjusting holes are arranged at the periphery of the connecting hole; the connecting hole is in interference fit with the connecting column; and the convex column is inserted into the adjusting hole. According to the artificial shoulder joint prosthesis, a collodiaphyseal angle, a torsion angle and an eccentric distance of a humeral head prosthesis can be continuously adjusted in a certain range, a better individual anatomical matching property is achieved, and different medical demands can be met.

Description

technical field [0001] The invention relates to an artificial shoulder joint prosthesis, which belongs to the field of medical instruments. Background technique [0002] At present, artificial shoulder joint replacement has been widely used clinically, and has good curative effect on diseases such as shoulder osteoarthritis, rheumatoid arthritis, comminuted fracture of proximal humerus, avascular necrosis of humeral head, and shoulder malignant tumors. . [0003] The design of artificial shoulder prosthesis has gone through 4 generations. The first-generation prosthesis is an integrated design with poor anatomical fit, and has been basically abandoned. At present, the prosthesis widely used clinically is the 2nd generation and 3rd generation prosthesis, and some use the 4th generation prosthesis. The previous prosthesis design cannot satisfy the continuous adjustment of the neck-shaft angle, torsion angle and eccentricity of the prosthesis at the same time. Therefore, the...

AI Technical Summary

Problems solved by technology

The first-generation prosthesis is an integrated design with poor anatomical fit, and has been basically abandoned

At present, the prosthesis widely used clinically is the 2nd generation and 3rd generation prosthesis, and some use the 4th generation prosthesis. The previous prosthesis design cannot satisfy the continuous adjustment of the neck-shaft angle, torsion angle and eccentricity of the prosthesis at the same time. Therefore, the original anatomical structure of the proximal humerus cannot be well restored.

[0004] Patent 201120075330.9 discloses a proximal humerus shoulder joint prosthesis, which consists of a humerus ball head, a proximal humerus handle, a humerus intramedullary needle, and screws. Both are fixed on the connecting head by screws. The disadvantage is that the angle between the proximal humeral handle and the humeral ball head cannot be adjusted, and the anatomical reconstruction of the proximal humerus cannot be realized.

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