Shoulder joint prosthesis

Abstract

The invention relates to a shoulder joint prosthesis. According to the technical scheme, the shoulder joint prosthesis comprises a humerus head and a humerus handle, wherein the humerus head comprisesan integrated structure consisting of a humerus ball head and a humerus shaft splicing column fixedly connected to the lower part of the humerus ball head; the humerus handle is an integrated structure consisting of a truncated-cone-shaped splicing disc, a conical connecting column connected to the upper end surface of the splicing disc and a humeral shaft medullary cavity inserting column connected to the lower end surface of the splicing disc, wherein a symmetrical groove is arranged on the humeral ball head, a plurality of sewing holes for sewing with peripheral shoulder joint tissues arearranged on the groove, the shoulder joint prosthesis also comprises a humerus pressing plate. According to the invention, the symmetrical groove is distributed at the upper end of the humerus ball head, the balance of the growth of shoulder soft tissues is considered, the plurality of sewing holes are arranged in the groove, the humerus ball head and surrounding tissues can be sewn together, theconnectivity is strong, and a humerus pressing plate is additionally arranged, so that the reliability and stability of the connection between the prosthesis and the shoulder joint are improved as a whole.

Description

technical field [0001] The invention relates to an orthopedic surgical implant prosthesis, in particular to a shoulder joint prosthesis. Background technique [0002] The human shoulder joint is the largest and most unstable joint in the human body. The proximal humerus is one of the most common sites for malignant primary bone tumors after the lower end of the femur and the upper end of the tibia. In the past two decades, with the gradual improvement of neoadjuvant chemotherapy and the progress of surgical techniques, bone tumors of the shoulder joint, shoulder Arthritis, humeral head necrosis and other shoulder orthopedic diseases, shoulder arthroplasty has become one of the important methods for the treatment of malignant bone tumors of the proximal humerus. Most of the existing clinical shoulder prostheses are composed of the humeral head and the humeral stem. The structure is not only complicated, but also consists of many parts. The clinical operation is difficult, an...

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Problems solved by technology

[0003] Chinese patent document (application number 201320239664.4) relates to a combined shoulder joint prosthesis, which consists of a humerus stem and a humerus head, wherein the humerus stem consists of a humerus stem proximal part and a humerus stem distal part through insertion It is composed of groove connection, during operation, the proximal humerus and distal humerus of different specifications can be replaced according to the anatomical shape of the shoulder joint, so as to realize the combination of the neck-shaft angle, retroversion angle and offset distance of the combined shoulder joint prosthesis, so as to achieve the best surgical performance. postoperative effect, but the structure of the prosthesis is complex and the operation is cumbersome, it is difficult to avoid the occurrence of loosening of the prosthesis after surgery

Both of the above two patents cannot avoid the relative rotation between the humeral head and the humeral stem of the prosthesis, or the occurrence of loose connection of the prosthesis, and their complex shape and structure do not conform to the anatomical structure of the human shoulder joint. The poor connection between the surrounding shoulder joint tissue and the prosthesis is prone to postoperative loosening of the prosthesis, and it is difficult to achieve the purpose of rapid recovery of shoulder joint function after surgery. Therefore, its improvement and innovation are imperative

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