Combined tumor-type ankle joint prosthesis

Abstract

The invention relates to a combined tumor-type ankle joint prosthesis which comprises an ankle bone side component, a polyethylene liner and a top component. Three backward down inclined ridges are formed at the bottom of the ankle bone side component in a projecting manner, an arched sliding surface is formed at the top of the ankle bone side component, a T-shaped projection is transversely arranged at the top of the polyethylene liner, the bottom of the polyethylene liner is recessed inwards to form a joint fossa for containing the sliding surface, the top component is provided with an upper connecting surface for connecting the top component with a tibial prosthesis, a T-shaped groove for containing the projection is transversely formed in the bottom of the top component, five through holes for repairing ligaments on the inner side and the outer side of an ankle joint are formed in the top component in a front and rear penetrating manner, the inner side of the top component extends downwards to form a projecting ridge, and the projecting ridge is abutted to the inner side face of the polyethylene liner. The prosthesis is reasonable in structural design, preparation and surgical operation are facilitated, stability of an artificial ankle joint is enhanced, loading and moving functions of the ankle joint are restored, and the prosthesis is suitable for limb salvage treatment of distal tibial malignant tumors.

Description

technical field [0001] The invention discloses an ankle joint prosthesis for reconstructing a large bone defect after distal tibial tumor resection, in particular to a combined tumor-type prosthesis composed of an ankle joint top component, a polyethylene liner and a talus side component. Ankle prosthesis. Background technique [0002] Under normal circumstances, below-knee amputation is the standard surgical procedure for malignant tumors in the middle and lower part of the tibia, but with the development of limb salvage technology and material science, autogra Prosthesis hybrid reconstruction) large bone defect after distal tibial tumor resection, and most scholars believe that the long-term efficacy of prosthetic reconstruction of large bone defect after distal tibial tumor resection is ideal. The traditional tumor-type artificial ankle prosthesis is mostly hinged. Although the stability of the ankle joint is protected to a certain extent, the articular surface can only ...

AI Technical Summary

Problems solved by technology

[0002] Under normal circumstances, below-knee amputation is the standard surgical procedure for malignant tumors in the middle and lower part of the tibia, but with the development of limb salvage technology and material science, autogra Prosthesis hybrid reconstruction) large bone defect after distal tibial tumor resection, and most scholars believe that the long-term effect of prosthetic reconstruction of large bone defect after distal tibial tumor resection is ideal

Traditional tumor-type artificial ankle prostheses are mostly hinged. Although the stability of the ankle joint is protected to a certain extent, the articular surface can only slide in the sagittal direction, and the range of motion of the ankle joint is reduced.

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