Assembled tumor type artificial tibiotalar joint prosthesis

Abstract

The invention relates to an assembled tumor type artificial tibiotalar joint prosthesis. The assembled tumor type artificial tibiotalar joint prosthesis comprises a tibia assembly, a talus assembly and a tibiotalar hinge type connecting assembly, wherein the tibia assembly is connected with the human tibia; the talus assembly is mainly composed of a talus base, a talus connecting column and a locking screw; the talus base is of a shell type structure matched with the surface shape of the talus; the talus connecting column is integrally formed on the lower portion of the talus base and extendsdownwards along the vertical axis; the locking screw penetrates through the talus base, the talus connecting column and the human talus along the coronal axis; and the tibiotalar hinge type connectingassembly is rotationally connected between the tibia assembly and the talus assembly, so that the tibia assembly and the talus assembly can relatively rotate in a sagittal plane, and the plantar flexion and dorsal extension functions of the tibiotalar joint are recovered. The prosthesis can be widely applied to bone defect reconstruction of limb continuity interruption after tumor resection underthe condition that the far end of the tibia or the far end of the fibula seriously affects the tibia, the purpose of limb structure recovery can be achieved, meanwhile, perfect combination of immediate stability and long-term stability of the tibiotalar joint is achieved, and therefore the long-term tibiotalar joint function of a patient is remarkably improved.

Description

technical field [0001] The invention relates to an artificial joint, in particular to a modular tumor-type artificial tibiotalar joint prosthesis which can freely adjust the length of the prosthesis and improve bone ingrowth. Background technique [0002] The tibia is the second most common site of osteosarcoma after the femur, and tibial osteosarcoma accounts for about 19% of total body osteosarcoma, and 20% of tibial osteosarcomas occur in the distal tibia. Due to the presence of many tendons, blood vessels, and nerves in the distal tibia, it is difficult to obtain a good tumor margin. Therefore, some scholars recommend below-knee amputation as the preferred surgical method for distal tibial osteosarcoma. In recent years, with the advancement of chemotherapy and surgical techniques, limb salvage treatment for osteosarcoma of the distal tibia can also achieve a good survival rate, and is recognized and recommended by the majority of bone tumor doctors. [0003] At present...

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Problems solved by technology

At the same time, the loosening of the prosthesis and the pain and swelling around the ankl

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