Ankle-joint prosthesis tibia side part

Abstract

The invention discloses an ankle-joint prosthesis tibia side part. The ankle-joint prosthesis tibia side part comprises a titanium-alloy tibia side assembly and a fixing pad, wherein an upper bearingsurface is arranged at the top end of the titanium-alloy tibia side assembly, four protruding pins are fixedly arranged at the four corners of the upper bearing surface respectively, a screw hole is formed in the middle of the titanium-alloy tibia side assembly, the four pins and a niche-fitting screw are fixed for providing initial stability for connection fixation between the upper bearing surface of the titanium-alloy tibia side assembly and the tibial far end after osteotomy, the surface of the upper bearing surface is of a cancellous-bone porous structure, has a biological function, and provides secondary stability, and a tibia and the osteotomy surface are rapidly fused and grow conveniently; an upper connecting surface is arranged at the top end of the fixing pad, and is fixedly connected with a lower embedding surface of the titanium-alloy tibia side assembly, and a lower sliding surface is arranged at the bottom end of the fixing pad, and is matched with a tibia joint surface;the upper bearing surface, the lower embedding surface, the upper connecting surface and the lower sliding surface are arc, and the tibia better meets a real ankle-joint structure of the human body.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an ankle joint prosthesis tibial side component. Background technique [0002] Artificial joint prosthesis is mainly used in patients with ankle joint pain, deformity and loss of function caused by various trauma, autoimmune diseases and degenerative diseases. For the ankle joint, the currently commonly used ankle arthrodesis will cause the patient to lose almost all the motion function of the ankle joint. Ankle joint replacement can retain most of the motion function of the ankle joint and completely solve the pain and deformity problems of the patient. The results of domestic and foreign patent inquiries show that the design of the existing total ankle prosthesis is not completely bionic in line with the anatomical structure of the real ankle joint of the human body, and the biomechanics have also changed, which does not conform to the laws and characteristics of motion...

AI Technical Summary

Problems solved by technology

[0003] The previous Chinese patent with the application number CN201710754997.3 disclosed an anatomical fixed liner ankle joint prosthesis. The disclosed anatomical fixed liner ankle joint prosthesis has a high revision rate of the total ankle joint prosthesis, a high loosening rate and Due to the defect of low stability, the tibial side component is now improved to provide a new tibial side component of ankle joint prosthesis

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