Artificial total wrist joint prosthesis made of nickel-titanium memory metal

Abstract

The invention relates to the technical field of body joint prostheses, in particular to an artificial total wrist joint prosthesis made of nickel-titanium memory metal. According to the structure, the artificial total wrist joint prosthesis comprises a radius handle connected with the radius, the upper end of the radius handle is connected with a radius joint surface, and a ball socket is arranged on the radius joint surface and matched with a polyethylene half ball arranged above the ball socket. A universal locking steel plate is arranged above the polyethylene half ball, the lower end of a metacarpal bone handle is clamped into a clamping groove above the polyethylene half ball in an embedded mode, and the upper end of the metacarpal bone handle sequentially penetrates through the universal locking steel plate and the capitate bone to be connected with the third metacarpal bone cavity and is designed to be shaped like the Arabic number 8, wherein the upper portion of the upper end of the metacarpal bone handle is open. The prosthesis can maintain the anatomical structure of the normal wrist joint, is firmly integrated with the soft tissue well, and is closer to the normal wrist joint in function, the biomechanics is more reasonable, the prosthesis is more stable, loosening is reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of human joint prosthesis, in particular to a nickel-titanium memory metal artificial total wrist joint prosthesis. Background technique [0002] The artificial total wrist prosthesis is mainly used in patients with wrist joint pain, deformity, and loss of function caused by various traumas, autoimmune diseases, and degeneration. Part of the function, reduce the disability rate, improve the quality of life of patients. The wrist joint is the most flexible and complex joint in the human body, and it performs the greatest function in daily life. Immune diseases such as rheumatoid arthritis often accumulate in the wrist joints, and degenerative diseases caused by trauma and overuse of work and life can cause serious damage to the wrist joints. However, the current general-purpose total wrist fusion technology will cause patients to lose the function of almost all wrist joints, especially for patients with ac...

AI Technical Summary

Problems solved by technology

[0003] U.S. Patent US8758445B2 discloses a total wrist prosthesis structure, but its material is made of commonly used metal materials. Although the radial stem and metacarpal stem are plug-in, similar structures are not well fixed in the radial medullary cavity and metacarpal medullary cavity , easy to come out

At present, there is no total wrist prosthesis material that uses nickel-titanium memory metal, so the rate of prosthesis loosening, instability, and fracture after total wrist replacement is high

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