Bionic tumor type knee joint prosthesis

Abstract

The invention relates to a bionic tumor type knee joint prosthesis, which comprises a femoral assembly, a tibial assembly and an artificial ligament; the femoral assembly comprises a femoral condyle prosthesis; the tibial assembly comprises a tibial prosthesis, a tibial tray and a tibial pad, wherein the tibial pad is arranged on the upper part of the tibial tray for bearing the femoral condyle prosthesis, and the lower part of the tibial tray is formed with a tibial marrow needle for inserting a marrow cavity of the tibial prosthesis; cross channels are formed in the femoral condyle prosthesis, the tibial pad, the tibial tray, and the tibial prosthesis; artificial ligaments for reconstructing the cruciate cruciate ligament and the lateral collateral ligament are arranged in the cross channels formed by the femoral condyle prosthesis, the tibial pad, the tibial tray and the tibial prosthesis as well as on the inner and outer sides of the femoral condyle prosthesis and the tibial prosthesis. According to the bionic tumor type knee joint prosthesis, based on the bionics principle, the design of changing the rigid fixation into the flexible fixation is adopted, so that the defect thatthe stress of the hinged knee joint prosthesis to the femur and the tibia is large is solved while knee joint reconstruction is achieved, the possibility of loosening the prosthesis in advance and refurbishing again is effectively prevented, and the service life of the prosthesis is prolonged.

Description

technical field [0001] The invention relates to an artificial joint, in particular to a bionic tumor type knee joint prosthesis suitable for reconstruction after distal femoral tumor resection. Background technique [0002] Around the knee joint is one of the common sites of primary malignant bone tumors, and malignant tumors such as osteosarcoma, Ewing's sarcoma, pleomorphic sarcoma, and chondrosarcoma are all prone to occur in this area. In recent years, tumor resection and artificial joint prosthesis reconstruction have become the main methods for the treatment of malignant bone tumors around the knee joint because of their good postoperative function such as immediate postoperative stability and early weight-bearing walking. However, with the prolongation of patients' survival and the extensive development of limb-salvage operations, many problems such as infection, loosening, and fracture of tumor-type prostheses may lead to secondary or multiple revision operations, or...

AI Technical Summary

Problems solved by technology

This design alleviates the rotational stress of the prosthetic medullary needle and the medullary cavity to a certain extent, but this design does not change the rigid fixation of the hinge, and cannot fundamentally reverse the stress of the medullary cavity under the walking cycle

[0004] In summary, the existing non-bionic tumor artificial prosthesis has biomechanical design defects, which has become a "stumbling block" to improve the failure rate of the prosthesis

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