Multifunctional elbow joint replacement prosthesis

Abstract

The invention provides a multifunctional elbow joint replacement prosthesis which comprises a humerus assembly, an ulna assembly, a radius assembly and a pin shaft assembly. The humerus assembly comprises a humerus handle, a yoke and a capitulum humeri. The ulna assembly comprises an ulna handle, an ulna neck and an ulna head. The radius assembly comprises a radial head and a radial bone marrow needle. The pin shaft assembly comprises a pin shaft outer nail of a hollow barrel structure and a pin shaft inner nail inserted into the pin shaft outer nail. One end of the pin shaft inner nail is provided with an anti-disengagement piece used for preventing the whole pin shaft inner nail from entering the pin shaft outer nail. The other end of the pin shaft inner nail is provided with a locking piece. The pin shaft assembly enables the ulna assembly to pivot around a shaft and fixes the capitulum humeri to a first convex lug. The multifunctional elbow joint replacement prosthesis accords with human body daily behavior movement characteristics, has the good stability and safety, can achieve partial replacement or whole replacement, improves biocompatibility with the sclerotin, and is not likely to cause looseness or infection or instability or other complications and long in service life.

Description

technical field [0001] The invention relates to the field of orthopedic implant technology, in particular to a multifunctional elbow joint replacement prosthesis. Background technique [0002] When the elbow joint is damaged due to rheumatism, deformed joint, or trauma, the function of the elbow joint is lost, and at the same time, severe pain is felt. In such cases, an artificial elbow replacement surgery is required in order to restore the function of the elbow joint. For example, during total elbow replacement surgery, the surgeon implants a prosthetic humeral component in the distal end of the patient's humerus and implants a prosthetic ulnar component in the proximal end of the patient's ulna. The prosthetic humeral component and the prosthetic ulnar component are typically connected by a hinge that enables pivotal movement between the prosthetic humeral component and the prosthetic ulnar component to reproduce the natural anatomical articulation of the elbow joint. ...

AI Technical Summary

Problems solved by technology

[0003] The existing artificial elbow joint prosthesis completely refers to the anatomical shape of the human elbow joint, which mainly includes the humerus component and the ulna component. Although it conforms to the daily behavior and movement characteristics of the human body, the following technical problems generally exist in the elbow joint prosthesis: (1) due to Complications such as loosening, infection, and instability (subluxation or dislocation) caused by structural defects; (2) The initial stability and joint stability of the humeral component and ulnar component are not high, and the force is unreasonable, resulting in elbow joint replacement The service life of the prosthesis is not long; (3) The bone cement composition of the elbow joint prosthesis is unreasonable, which affects the stability and safety of the elbow joint after operation

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