3D printing method of bone defect prosthesis

Abstract

The invention relates to a 3D printing method of a bone defect prosthesis, and belongs to the technical field of making of a bone prosthesis. The 3D printing method comprises the steps of establishinga bone defect model: constructing a three-dimensional mathematical model for bone defect through a CT or MRI technique; establishing a prosthesis model; compiling a printing program; performing pre-printing: performing printing, and performing layer-by-layer printing of the prosthesis; switching on a heat insulation device in a printing table, and keeping the temperature of the surface being in contact with the prosthesis, of the heat insulation device consistent with the temperature of the prosthesis; reducing the temperature: after printing is completed, rotating the printing table for aircooling and reducing the temperature; and taking down the prosthesis to end printing. According to the 3D printing method disclosed by the invention, through a gradient structure of a supporting framework layer and a merging layer, on one hand, the structural strength is guaranteed, the functionality is realized, on the other hand, through combination of the merging layer and a natural bone, the combining strength can be increased, through the gradient design, the purposes of saving the cost and reducing the weight are realized easily through selection of materials, and help is provided for promoting clinical application of bone prosthesis.

Description

technical field [0001] The invention relates to the technical field of bone prosthesis production, in particular to a 3D printing method for a bone defect prosthesis. Background technique [0002] 3D printing is a kind of direct digital manufacturing, which has fast forming and low production cost, and has been widely used in model manufacturing in mold manufacturing, industrial design and other fields. In recent years, with the rapid development of biotechnology, the medical field has gradually adopted 3D printing technology to improve product molding efficiency and shorten the recovery cycle. [0003] However, 3D printing technology only gives a general idea: gradually form products through material accumulation. In specific applications, there are still many problems. For example, the heat generated during printing may form thermal stress, causing deformation problems such as product warping, and serious quality problems such as cracks and shrinkage may occur. There may ...

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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a 3D printing method for bone defect prosthesis, using titanium and tantalum for composite gradient printing, and adding anti-stress measures to solve the lack of affinity of a single material in the prior art Or the weight is too heavy, the price is expensive, and the problems of deformation, cracks and shrinkage caused by thermal stress

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