Extensible prosthesis

Abstract

The invention provides an extensible prosthesis. A first prosthesis, a second prosthesis and a deformation structure are arranged in the extensible prosthesis, wherein the first prosthesis is providedwith an accommodating cavity; the second prosthesis is connected with the first prosthesis; the second prosthesis is movably arranged relative to the first prosthesis; the deformation structure is arranged in the accommodating cavity; one end of the deformation structure cooperates with the second prosthesis; the deformation structure is manufactured from magnetic memory alloys, and can be deformed under the effect of an external magnetic field; and under the situation that the deformation structure is deformed, the second prosthesis is driven to move in the direction away from the first prosthesis so as to extend the total length of the extensible prosthesis. According to the extensible prosthesis disclosed by the invention, the deformation structure is manufactured from the magnetic-controlled shape memory alloy; the deformation structure can be deformed through the exerting magnetic field from outside, so that the extensible prosthesis is extended; and after being transplanted, theextensible prosthesis can be extended through exerting an appropriate magnetic field from outside, so that exerting wounded operation is not needed.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an extendable prosthesis. Background technique [0002] There are more than 10,000 primary osteosarcoma cases in China every year. Osteosarcoma accounts for 10% of primary bone tumors and 20% of primary malignant tumors. The annual incidence is 1-3 per 1 million people, and 75% of the patients are 10-30 years old. It seriously affects the body and mind of young adults. healthy malignancy. [0003] The concept of limb salvage surgery has evolved and matured over the past 25 years. Limb salvage surgery mainly includes the complete resection of the involved bone tumor and the reconstruction of the bone defect. In the past two to three decades, bone tumor diagnosis and treatment centers in the United States and Europe have used various reconstruction techniques. Reconstruction of limbs. With the analysis of follow-up results of different reconstruction methods in recent ye...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides an extendable prosthesis to solve the problem that the extendable prosthesis in the prior art needs trauma-generating surgery to prolong

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