Manufacturing method of personalized knee bionic prosthesis based on 3D printing

Abstract

The invention discloses a manufacturing method of an individualized customized knee joint topological optimization bionic prosthesis based on 3D printing, which relates to the technical field of medical artificial joints. The problem that the manufacturing method is urgently needed to reduce prosthesis looseness or fracture around the prosthesis is solved, and the method comprises the steps: establishing and assembling a tibia model and a knee joint prosthesis model, and performing finite element analysis and topological optimization; carrying out fairing; designing a specific structure of themodel, optimally reserving an internal region by adopting a solid structure, optimally reserving an outer layer region and optimally removing the region by adopting a grid structure, and forming a gradient between the regions; introducing back an assembly state of a tibia model, performing finite element analysis, comparing with a first finite element analysis result, judging whether 3D manufacturing and application are performed or not, and performing topological optimization again if the 3D manufacturing and application cannot be performed. The prosthesis prepared by the invention reduces the problem of prosthesis looseness or prosthesis peripheral fracture, provides space for ligament stop point implantation and internal bone grafting, is light in weight, and is beneficial to bone tissue ingrowth.

Description

technical field [0001] The invention relates to the technical field of medical artificial joints, in particular to a method for manufacturing an individualized knee joint bionic prosthesis based on 3D printing. Background technique [0002] Large-scale defects around the knee joint are more common in giant cell tumor of bone, knee joint revision surgery and trauma, often accompanied by joint structural destruction, requiring joint replacement surgery. When the defect is large and the surrounding ligaments are severely damaged, a tumor-type hinge knee prosthesis is commonly used. When the defect is large and the ligament needs to be preserved, there is no specific type of prosthesis at home and abroad, and most tumor-type hinged knee prostheses are still used. Such as figure 1 However, this type of prosthesis has a large damage to the attachment point of the surrounding ligaments, and there is stress shielding between the long stem of the tibial and femoral prosthesis and t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that there is an urgent need for a manufacturing method of a knee bionic prosthesis to reduce prosthetic loosening or periprosthetic fractures, the present invention provides a manufacturing method of an individualized knee bionic prosthesis based on 3D printing

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