Method for constructing microporous structure of bionic support

Abstract

The invention relates to a method for constructing a microporous structure of a bionic support, which comprises the following steps: performing overall scanning of a natural bone by using Micro-CT technology to extract data of a spongy bone and reconstructing the spongy bone to obtain a model of the microporous structure of the spongy bone; extracting a model of a unit body from the model of the spongy bone; obtaining a model of a three-dimensional microporous structure by mirroring; and finally, performing Boolean intersection operation with the model of the three-dimensional microporous structure and a model of a damaged bone to obtain a model of the microporous structure of the bionic support matched with a damaged part. According to the design method, the amount of processed data is reduced in a reconstruction process. The design method of obtaining a large model by mirroring the unit body solves the problem of local fault in the micro structure. According to design requirements, the model of the microporous structure, which is obtained by mirroring, may have an infinite size. The microporous structure of the obtained model of the bionic support is similar to the structure of a real bone, which is more favorable for cell adhesion, cell climbing and osteogenic replacement. The bone support designed by the method has the same profile as the real bone and thus can be implanted more conveniently.

Description

technical field [0001] The invention relates to the design of an artificial bone for orthopedic medical repair, in particular to the reconstruction and design of a bionic scaffold porous structure based on natural bone. Background technique [0002] With the rapid development of material science and medical technology, as well as the improvement of people's living standards, medical care, and rehabilitation, coupled with the aging of the population, people have increasingly urgent requirements for the repair and replacement of human tissue, organ, and bone defects. It has always been a difficult problem for orthopedic surgeons to repair various bone defects caused by trauma, infection, tumor and other diseases, especially the large defects of the long bone backbone of the limbs. Bone transplantation is a conventional treatment method, but the source of autologous bone is limited, while allogeneic bone transplantation has the risk of immune rejection and disease transmission....

AI Technical Summary

Problems solved by technology

However, in the reconstruction process, the microstructure of the artificially designed scaffold is still very different from the structure of natural real bone, and it is difficult to fully guarantee the functionality of its structure; moreover, the data files of the 3D model of the microstructure are very huge, and the processing is quite complicated , often exceeding the requirements of rapid prototyping systems

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