Knee prosthesis of an alloy ceramic composite

By using 3D printing integrated design and surface texturing of alloy ceramic composite materials, the problem of spacer detachment in traditional knee joint prostheses has been solved, achieving stability and personalized customization, extending the life of the prosthesis, and reducing the risk of secondary replacement.

CN117179974BActive Publication Date: 2026-08-25BEIJING AKEC MEDICAL +1
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Patent Information

Application Number
CN202311204864.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-19
Publication Date
2026-08-25
Estimated Expiration
2043-09-19

AI Technical Summary

Technical Problem

In traditional knee prostheses, the spacer is prone to slipping and detaching from the tibial plateau, leading to increased wear and tear. In the long run, this may result in prosthesis paralysis, requiring a second replacement surgery. There are also limitations in terms of wear resistance, biocompatibility, and personalized customization.

Method used

The tibial plateau and femoral condyle, made of alloy ceramic composite material, are integrated into a single design using 3D printing technology. The material distribution gradually transitions from a high-strength alloy at the bottom to a high-wear-resistant ceramic at the top, with micro- and nano-scale textures on the surface. Combined with powder metallurgy technology, this ensures stable contact and promotes bone integration.

Benefits of technology

It improves the stability of knee prostheses, reduces the risk of secondary replacement, enables personalized customization, enhances the mechanical anchoring force with the bone, extends the life of the prosthesis, and reduces wear.

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Abstract

The invention relates to a kind of alloy ceramic composite knee joint prosthesis and its preparation method.The prosthesis is composed of femoral condyle and tibial plateau, both of which are made of alloy and ceramic composite material, the bottom of tibial plateau is made of alloy with high strength and wear resistance, and the top of tibial plateau is made of alloy and ceramic material mixed and made by 3D printing.The preparation process combines powder metallurgy and 3D printing technology to ensure the accurate distribution and structure of the material.In addition, the shape and size of the prosthesis can be customized according to the needs of the patient to achieve better matching and functional recovery.
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