Method for light weight of 3D printing personalized external fixed supporting tool based on topology optimization

Abstract

The invention relates to a method for light weight of a 3D printing personalized external fixed supporting tool based on topology optimization. The method comprises the following steps of: step 1, scanning the limbs of an object to obtain data. Step 2, carrying out image segmentation and three-dimensional construction of the model to obtain a three-dimensional shell-like model of the surface of the limbs. Steps 3, carrying out surface modification treatment to construct a curved surface sheet of the outer contour of the limbs, and being imported to the computer-aided design software and beingtransformed to a shell-shaped curved surface model. Step 4, obtaining the initial finite element analysis result by using a finite element analysis software. Step 5, an iterative operation is designedon the basis of the optimization design of the sensitive algorithm. And finally, performing 3D printing to obtain the personalized external fixed supporting branch. The method combines the 3D printing technology to realize the optimized design and manufacture of the personalized external fixed supporting tool, not only can guarantee the effect of external fixation treatment of the supporting tool, meanwhile, the light weight design obviously improves the wearing comfort of the supporting tool, and can effectively reduce the medical cost.

Description

technical field [0001] The invention relates to the technical field of personalized limb orthopedic rehabilitation medical equipment, in particular to a lightweight method for 3D printing personalized external fixation braces based on topology optimization. Background technique [0002] Clinically, congenital developmental deformities of limbs, joints and spine often occur in children and adolescents, and their etiology and morphological manifestations are often complex and changeable, showing highly individual characteristics. In addition, the sequelae of trauma or nervous system injury often lead to secondary anatomical and morphological changes of the limbs, and the pathological features also have significant individual characteristics of the patient. If such congenital and acquired limb shape abnormalities cannot be corrected and treated in a timely manner, they will lead to permanent and irreversible pathological changes in the limbs and trunk, which will affect the wei...

AI Technical Summary

Problems solved by technology

Despite this, there are still various problems in the actual clinical application of traditional braces: traditional braces take a long time to manufacture, and the manufacturing process requires high technical requirements such as impression taking, measurement, and shaping, which often delays the process of orthopedic treatment for patients; Labor costs account for most of the proportion, the degree of automation is low, and the fineness and matching degree of manual production by personnel are often unsatisfactory in terms of wearing effect; moreover, the materials selected for the manufacture of braces are relatively fixed, and traditional materials have a single type. , the strength characteristics are difficult to match the requirements of complex orthopedics, and the air permeability and wearing comfort are poor.

The above-mentioned problems and factors lead to the compliance of patients, especially adolescents and children, to wear them, which greatly affects the final effect of limb orthopedic treatment.

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