A hingeless ligament biomimetic tumor half/total knee joint prosthesis reconstruction system

Abstract

The invention discloses a hingeless ligament bionic tumor half / total knee joint prosthesis reconstruction system, comprising a distal femoral prosthesis, a proximal tibial prosthesis, and an artificial ligament. The hole A and the through hole B are respectively used for one end of the anterior / posterior cruciate ligament to pass through and be fixed on the distal femoral prosthesis. The other end of the posterior cruciate ligament is passed through and fixed on the proximal tibial prosthesis; the inner and outer sides of the distal femoral prosthesis are respectively provided with collateral ligament fixing structures for fixing one end of the medial / lateral collateral ligament to the distal femur end prosthesis, the collateral ligament fixation structure can be rotated relative to the distal femoral prosthesis; ligament fixation grooves are respectively opened on the inner and outer sides of the proximal tibial prosthesis for fixing the other end of the medial / lateral collateral ligament on the proximal tibial prosthesis. The invention restores the motion function of the knee joint by reasonably fixing the artificial ligament, and has good ligament fixation stability.

Description

technical field [0001] The invention relates to the field of artificial prosthesis replacement, in particular to a hingeless ligament bionic tumor half / total knee joint prosthesis reconstruction system. Background technique [0002] Around the knee joint is one of the common sites of primary bone malignancies. Malignant tumors such as osteosarcoma, Ewing sarcoma, pleomorphic sarcoma, and chondrosarcoma all occur in this site. 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 functions such as immediate postoperative stability and early weight-bearing walking. Joint replacement is the most commonly used surgical reconstruction method. At present, pure hinge connection and rotary hinge are the mainstream design concepts adopted by almost all tumor-type artificial joints: due to the large segmental bone defect on the fe...

AI Technical Summary

Problems solved by technology

At present, the simple hinge connection and rotating hinge are the mainstream design concepts adopted by almost all tumor artificial joints: due to the large bone defect on the femoral and / or tibial side, there are no cruciate ligaments, joint capsules and joints around the tumor knee joint. Stable structures such as the medial and lateral collateral ligaments, the hinged tumor-type knee prosthesis usually only allows flexion and extension activities on one plane, without varus, varus, and circumferential rotation. This type of prosthesis limits the physiological activities of the knee joint. In recent years, The emerging rotating hinge structure, while retaining the hinge structure, adds a rotating axis sunk into the side of the tibial plateau, allowing the tumor-type artificial joint to have a certain range of internal and external rotation during normal flexion and extension, but this design does not change the hinge. Rigid fixation method, the contact interface between the prosthetic needle and the medullary cavity of the bone bears great rotation and pull-out stress during each walking cycle

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