Method for measuring through hole rate of 3D titanium alloy bone trabecula acetabular cup
A technology of 3D printing and measurement method, which is applied in the direction of measurement device, permeability/surface area analysis, suspension and porous material analysis, etc., and can solve problems such as inability to transmit light, and inability to determine the number and position of trabecular clogged holes , to achieve the effect of clear image
Active Publication Date: 2019-12-06
JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD
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Problems solved by technology
Using this method to detect the multi-layer porous structure of titanium alloy trabecular bone, the through-porosity of the specified section cannot be determined due to the mutual shielding of multi-layer porous materials. Translucent, the porosity of the trabecular bone of the acetabular cup cannot be measured by this method
Using the drop method to measure the porosity, it is impossible to determine the number and location of trabecular plugged holes
Method used
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[0033] The following implementation examples are only descriptive, not restrictive, and cannot limit the protection scope of the patent of the present invention.
[0034] Firstly, 3D printing technology was used to prepare titanium alloy trabecular bone cup specimens. The specimens included the solid part of the trabecular bone cup and the trabecular bone part. Trabecular bone structure, the size range of the cup is 40-80mm.
[0035] According to the size and specifications of the acetabular cup, the theoretical morphological figure of the trabecular bone at the concentric spherical position of the acetabular cup is created. A theoretical model of the trabecular volume capable of containing the cup is formed using the crystallographic structure or any trabecular structure that favors bone ingrowth through topological expansion. The volume model of the bone trabecula was cut with concentric spheres of different radii to obtain the structural morphology of the surface of the ac...
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The invention provides a method for measuring the through hole rate of a 3D titanium alloy bone trabecula acetabular cup and belongs to the technical field of design and manufacturing of medical instrument metal implants. According to the characteristic of periodic symmetry of the bone trabecula acetabular cup, firstly, the bone trabecula acetabular cup is divided into three areas capable of representing the whole acetabular cup structure; secondly, according to the size and specifications of an acetabular cup sample, theoretical bone trabecula morphological graphs of the acetabular cup on surfaces and inside the three areas are created, moreover, surface and internal bone trabecula graphs of the acetabular cup sample in the three structural areas are respectively collected through the digital image technology; thirdly, the number of holes in the morphological graphs of the bone trabecula acetabular cup sample at the spherical surface position of the designated area is compared with the number of holes in the morphological graphs of the bone trabecula theoretical model, and the bone trabecula through hole rate at the position is calculated; and lastly, the minimum value of the through hole rate of the surface bone trabecula and the internal bone trabecula in the three areas of the acetabular cup is taken as the through hole rate of the whole acetabular cup. The method is advantaged in that a problem that the through hole rate of a 3D printing titanium alloy bone trabecula acetabular cup cannot be measured in the prior art is effectively solved.
Description
technical field [0001] The invention relates to a method for measuring the porosity of a 3D titanium alloy trabecular acetabular cup, 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 test of titanium alloy trabecular bone specimens and the important index of prosthesis 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 of titanium alloy trabecular bone, the through-porosity of the specified section cann...
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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 刘念叶金铎张胜卿张兰兰
Owner JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD