3D-printed embedded titanium-magnesium alloy bone restoration

By embedding a magnesium alloy structure in a titanium alloy column and combining it with limiting and locking designs, the shortcomings of single-material bone prostheses are solved, enabling controllable degradation and stable connection of the bone prosthesis, and improving mechanical properties and vibration resistance.

CN224320787UActive Publication Date: 2026-06-05PEKING UNIVERSITY THIRD HOSPITAL (THE THIRD CLINICAL MEDICAL SCHOOL OF PEKING UNIVERSITY)
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Patent Information

Application Number
CN202520690098.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-14
Publication Date
2026-06-05
Estimated Expiration
2035-04-14

AI Technical Summary

Technical Problem

Existing single titanium alloy bone prostheses have a large difference in elastic modulus compared to human bone, resulting in a stress shielding effect. Single magnesium alloy bone prostheses have poor mechanical strength and corrosion resistance.

Method used

The 3D-printed interlocking titanium-magnesium alloy bone prosthesis embeds a magnesium alloy structure within a titanium alloy column. The titanium alloy column provides mechanical support, while the magnesium alloy structure gradually degrades to promote bone growth. The stability and precise positioning of the magnesium alloy structure are ensured through the cooperation of limiting protrusions, directional slides, positioning plates, and positioning grooves.

Benefits of technology

It achieves controlled degradation of bone repair tissue, avoids secondary surgery, improves mechanical strength and corrosion resistance, increases structural stability and vibration resistance, and reduces installation errors.

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Abstract

The utility model relates to a 3D (three-dimensional) printed embedded titanium-magnesium alloy bone repair body, belongs to the field of bone repair bodies, and solves the problems that in the prior art, the difference between the elasticity modulus of an existing single titanium alloy bone repair body and the elasticity modulus of a human skeleton is large, the stress shielding effect is easily caused, and the mechanical strength and the corrosion resistance of a single magnesium alloy bone repair body are poor. The titanium alloy column comprises a titanium alloy column body, a magnesium alloy structure and an inlay structure, wherein the magnesium alloy structure is connected with the titanium alloy column body through the inlay structure; a plurality of evenly-distributed inlaying grooves are formed in the circumferential direction of the titanium alloy column body, directional sliding ways are arranged on the two side walls of each inlaying groove, the magnesium alloy structures are arranged in the inlaying grooves, limiting protrusions are arranged on the two sides of each magnesium alloy structure, and the limiting protrusions are connected with the directional sliding ways in a sliding mode. The magnesium alloy structure is embedded in the titanium alloy column body, mechanical support is provided by the titanium alloy column body, the magnesium alloy structure is gradually degraded to promote bone growth, and the defect of a single material is effectively avoided through combination of the magnesium alloy structure and the titanium alloy column body.
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