A Modular Half Knee Prosthesis for Ligament-preserving Tibia Tumor

Abstract

The invention provides a ligament reserved assembled semi-knee-joint prosthesis for a tibial tumor. The prosthesis comprises a tibia pad, a tibial end prosthesis, a diaphysis elongation segment and amarrow cavity elongation handle, wherein the tibia pad and the tibial end prosthesis are connected with locking snapping grooves through matched locking structures and are fixed through locking nails,the tibial end prosthesis and the diaphysis elongation segment are connected by adopting an anti-revolving snapping structure, the diaphysis elongation segment and the marrow cavity elongation handleare connected by adopting an anti-revolving snapping structure. An upward-outstanding arc-shaped articular surface is arranged at the top of the tibia pad, two rows of longitudinal-distributed through holes are formed in the tibia pad located at a middle position of the arc-shaped articular surface, and a square groove encircling the through holes is formed in the bottom end of the tibia pad; andlongitudinal-distributed patellar ligament holes are formed in the front side of the tibial end prosthesis, and internal lateral ligament holes and external lateral ligament holes are separately formed in the left and right sides of the tibial end prosthesis. The prosthesis has a reserved thighbone articular surface, thighbone lateral osteoepiphysis and surrounding ligament tissue, and thus, thebone growth function of a children sufferer is guaranteed; and the prosthesis is low in cost, high in durability, small in wound area, convenient to implant and high in reliability.

Description

technical field [0001] The invention relates to the field of artificial prosthesis replacement, in particular to a ligament-preserving tibial tumor modular half-knee joint prosthesis. Background technique [0002] At present, primary and secondary malignant bone tumors are motor system tumors that seriously threaten the survival and quality of life of patients. With the development of surgical techniques, the innovation of tumor imaging technology and the development of neoadjuvant chemotherapy for patients with malignant tumors, limb salvage surgery has become a consensus in the treatment of malignant bone tumors. Malignant tumors that occur in the long backbone of the limbs need to follow the principle of extensive resection in clinical practice. Therefore, the reconstruction of the bone defect after tumor resection has attracted much attention, especially in children. In recent years, children are a frequent group of malignant bone tumors. The most common malignant tumor...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a ligament-retaining tibial tumor modular half-knee prosthesis, which is used to solve the problems of high cost, low durability and large trauma area of ​​the prosthesis in the prior art

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