Bone induction differentiated metal bone trabecula knee joint prosthesis and preparation method thereof

Abstract

The invention belongs to the field of medical apparatus, and particularly relates to a bone induction differentiated metal bone trabecula knee joint prosthesis and a preparation method thereof under the precision control using incremental manufacturing technology. The prosthesis comprises a femoral condyle prosthesis, a tibial plateau prosthesis, a tibial plateau pad prosthesis and a patellar prosthesis. Osseointegration interfaces of the femoral condyle prosthesis, tibial plateau prosthesis and patellar prosthesis is in the structure of the bone induction differentiated metal bone trabecula. The preparation method comprises the steps of determining the gradient structure of stress and strain in knee prosthesis, determining the parameters of the porous structure of trabecular bone, establishing a three-dimensional model of the porous structure, conducting slicing and stratification treatment of the three-dimensional model, and conducting electron beam incremental manufacturing of the knee joint prosthesis metal bone trabecula, cooling to obtain the final finished product. The bone induction differentiated metal bone trabecula knee joint prosthesis and the preparation method thereof for the first time achieve the balance between the stress and bone induction performance for stress regions of different osseointegration interfaces of bone in knee joint, satisfy the differentiation requirement of bone induction, provide a preparation method of mass production, and effectively reduces manufacturing cost.

Description

Technical field [0001] The present invention relates to the field of medical devices, and in particular to a differentiated osteoinductive metal trabecular knee joint prosthesis and a preparation method thereof. Background technique [0002] In orthopedic artificial prosthesis implantation surgery, how to achieve effective osseointegration between the prosthesis and the bone, and whether the prosthesis has an interface that is conducive to later bone ingrowth, have always been the focus of great concern to clinicians. [0003] The trabecular bone structure is a three-dimensional network structure within the bone, and the pores are interconnected. It is a complex tissue with a tight pore structure. [0004] Bone stress: In normal human bones, osteoblasts and osteoclasts regulate bone growth or absorption through stress. When the bone stress is lower than 2MPa, the bone tissue absorbs; when the bone stress is about 20-60MPa, the bone tissue grows; and when the bone stress is...

AI Technical Summary

Problems solved by technology

[0006] At present, in the global artificial knee prosthesis, there is no prosthesis design that configures different metal trabecular structures according to different stress-bearing areas of the knee joint, which fails to solve the problem of good integration between the prosthesis and bone interface after knee joint surgery that clinicians care about. question

Images