Composite tumor type knee joint prosthesis reserving epiphysis

Abstract

The invention discloses a composite tumor type knee joint prosthesis reserving an epiphysis. The composite tumor type knee joint prosthesis comprises a thighbone prosthesis gripper, a connecting pieceand a thighbone prosthesis stem assembly, wherein the thighbone prosthesis gripper, the connecting piece and the thighbone prosthesis stem assembly are arranged from bottom to top; a plurality of gripper pieces are arranged at the bottom of the side end surface of the thighbone prosthesis gripper at intervals; the thighbone prosthesis gripper is fixedly connected to the connecting piece; and a side hole plate is arranged at the top of the side end surface of the connecting piece, and four side screw holes are formed in the side hole plate at intervals from top to bottom. According to the composite tumor type knee joint prosthesis reserving the epiphysis, after a distal femur malignant bone tumor is cut off, the epiphysis of a child can effectively reserved, the growing ability of the epiphysis and the stability of a knee joint is reserved, and the clinical problem that lower limbs of the child are unequal length after bone tumor surgery can be effectively reduced.

Description

technical field [0001] The invention relates to a knee joint prosthesis, in particular to a combined tumor-type knee joint prosthesis with epiphysis preserved. Background technique [0002] The pathogenesis of osteosarcoma is still unclear. The diseased site is mainly located in the metaphysis of the long tubular bone of the extremities, and the distal femur is the most common site. The main problem of limb salvage in children is that the affected limb will be shortened due to epiphyseal destruction, joint deformity, and even severe claudication and compensatory scoliosis will occur when the patient becomes an adult. Although there are extendable prostheses, they still cannot effectively solve the problem of limb shortening. If the tumor does not invade the epiphysis, limb-salvage surgery with preservation of the epiphysis has become the first choice for the treatment of children with distal femoral osteosarcoma. Therefore, the customized tumor-type prosthesis with preserva...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of the existing knee joint prosthesis, such as long operation time, infection, absorption of grafted bone or inactivated bone, nonunion or delayed union of fracture ends, loosening of internal fixation, etc. For problems such as epiphyseal damage in children, we provide a combined tumor-type knee prosthesis that retains the epiphysis

Images