Design and manufacturing method of porous structure material based on medical implant

Abstract

The invention provides a design and manufacturing method of a porous structure material based on a medical implant, and the manufacturing method uses a selective laser melting technology to carry out 3D printing, and the design method comprises the following steps: A1, establishing a three-dimensional space grid, and establishing a space dot matrix by using each node of a three-dimensional network; A2, generating a plurality of probability ball models in the space lattice by taking each node as a circle center, controlling the motion range of randomly generated points on the spherical surface of the spherical model by controlling the size of each probability spherical model, and obtaining a point-following dot matrix composed of the randomly generated points in the space of the space dot matrix; A3, dividing the space dot matrix in a wireframe manner based on randomly generated points in the random dot matrix, and taking the wireframe for dividing the space as a skeleton of the irregular porous structure; A4, carrying out edge covering and smoothing treatment on the skeleton to generate an irregular porous structure 3D model which can be used for a medical implant. According to the invention, an irregular porous structure for a medical implant can be designed and manufactured.

Description

technical field [0001] The invention relates to 3D printing technology, especially the design and manufacturing method of porous structure materials based on medical implants. Background technique [0002] In recent years, incidents of bone injuries have been common. According to relevant statistics, the number of people injured in road traffic accidents in China in 2005 alone was as many as 470,000. There are still a large number of bone disease patients waiting for matching bone tissue implants every year. , it can be seen that the demand for artificial implants is very large. At present, for damaged bone tissue, metal implants with high mechanical properties are often used clinically for replacement, such as stainless steel, titanium and titanium alloys, cobalt-chromium alloys and other metal implants, and have been widely used, such as artificial Knee joint, dental implant, artificial bone, etc. However, there are long-term aseptic loosening and fractures in artificial...

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Problems solved by technology

[0005] At present, although scholars at home and abroad have achieved fruitful results in the study of porous structures by using selective laser melting technology, the problems of pore structure, mechanical properties, and biocompatibility of porous materials have not been fundamentally resolved. The reports and researches on porous structures are very mature, and there are few reports on the related exploration of irregular porous structures. Because irregular porous structures have the characteristics of personalized molding and good biocompatibility, they can improve the therapeutic effect after bone injury repair. Provide more reasonable treatment methods for the majority of patients with bone injuries, which has great social significance and economic value

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