Measuring method of porosity of 3D printed titanium alloy trabecular bone structure cuff

Abstract

The present invention proposes a measurement method for the through-porosity of 3D printed titanium alloy trabecular bone structure sleeves. According to the characteristics of bone trabecular structure sleeves, the bone trabecular structure sleeves are divided into 12 regions; Or the theoretical model of bone trabecular structure sleeve that is conducive to the growth of bone into trabecular bone, and obtain the graphics of the surface and internal bone trabecular structure of the theoretical model of bone trabecular structure sleeve; use dental tray powder to infuse 3D printed titanium alloy bone Beam structure cuff, obtain the morphological graphics of the surface and internal bone trabecular structure of the 3D printed titanium alloy trabecular structure cuff; use digital correlation technology to collect the surface and internal bone trabecular structure of the 3D printed titanium alloy trabecular structure cuff A clear image of the beam structure shape graphics; use the comparison method to determine the surface and internal through-porosity of the 3D printed titanium alloy trabecular bone structure sleeve. porosity.

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 used in primary and revision hip replacement surgery caused by osteoarthritis. It is fixed in the femoral medullary cavity by initial press-fitting, and its long-term stability depends on the growth of trabecular bone cells. and bone ingrowth performance; however, the triangular design of the cuff, the taper locking, 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 degree

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