Method for measuring through hole rate of 3D printing titanium alloy bone trabecula structure oversleeve

Abstract

The invention provides a method for measuring the through hole rate of a 3D printing titanium alloy bone trabecula structure oversleeve. According to characteristics of the bone trabecula structure oversleeve, the bone trabecula structure oversleeve is divided into 12 areas; a bone trabecula structure oversleeve theoretical model formed by a crystal structure bone trabecula or a bone trabecula facilitating bone growth is created, and graphs of surface and internal bone trabecula structure forms of the bone trabecula structure oversleeve theoretical model are obtained; the dental base acrylic resin powder is poured into the 3D printing titanium alloy bone trabecula structure oversleeve to obtain morphological graphs of the 3D printing titanium alloy bone trabecula structure oversleeve on the surface and the internal bone trabecula structure; clear images of bone trabecula structure morphological graphs on the surface and inside the 3D printing titanium alloy bone trabecula structure oversleeve are collected by utilizing the digital correlation technology; the surface and internal through hole rate of the 3D printing titanium alloy bone trabecula structure oversleeve is determined byadopting the comparison method. The method is advantaged in that the purpose is to accurately detect the through hole rate of the titanium alloy bone trabecula structure oversleeve printed by a 3D printer.

Description

technical field [0001] The invention relates to a method for measuring the through-porosity of a 3D printed titanium alloy trabecular bone structure cuff, and belongs to the technical field of design and manufacture of medical device metal implants. Background technique [0002] At present, there have been some reports on the design and application of 3D printed titanium alloy trabecular bone prosthesis at home and abroad, but there is no corresponding test method for the through-hole rate that affects the important indicators of titanium alloy trabecular bone cell growth and bone ingrowth performance. . Liu Yi and others published a device for measuring the through-porosity of a ceramic carrier using flat light, 201120211275.1, and Jiang Dacheng published a method for measuring the through-porosity of an automobile exhaust filter using parallel light and frosted glass, 201410086862.0. Using this method to detect the multi-layer porous structure composed of trabecular bone ...

AI Technical Summary

Problems solved by technology

Using this method to detect the multi-layer porous structure composed of bone trabeculars for titanium alloys will cause detection errors due to the mutual occlusion of multi-layer porous materials.

Measuring the porosity of trabecular bone by the drop method cannot determine the location and quantity of the clogged pores inside the trabecular bone

[0003] The titanium alloy trabecular bone cuff is a key component for primary and revision hip replacement surgery caused by osteoarthritis. It is fixed in the femoral medullary cavity through initial press-fitting, and its long-term stability depends on the growth of trabecular cells and Bone ingrowth performance; however, the triangular design of the cuff, the taper lock, and the stepped surface treatment make the surface and internal structure of the titanium alloy trabecular bone structure cuff relatively complex, which increases the difficulty of measuring the porosity of the trabecular bone structure

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