Digital design of personalized scoliosis orthopedic braces based on 3D printing technology

doi:10.3969/j.issn.2095-4344.1994

Abstract

Abstract:

BACKGROUND: The design and manufacture of traditional spinal brace have the disadvantages of poor fit and long processing cycle. The use of computer-aided design and 3D printing of the spinal brace has the advantages of individualization, accurate correction position and short design time.

OBJECTIVE: This study combines computer aided engineering, biomechanical analysis and fused deposition modeling technology to propose a feasible scheme of 3D printing for spine brace.

METHODS: A finite element model of an adolescent idiopathic scoliosis patient based on human anatomy was constructed in volunteers with idiopathic scoliosis. Based on patient profile information and three-point stress principle, brace model was parameterized and its biomechanical properties were analyzed. The patient signed the informed consent. This study was approved by the Hospital Ethics Committee. The brace was optimized by finite element analysis to obtain the optimal brace model. The brace model was printed by 3D printing technology. Finally, the wearing evaluation of patients was carried out.

RESULTS AND CONCLUSION: (1) The biomechanical properties of wearing brace were analyzed by finite element method to predict its corrective effect. Ten groups of different sizes of tightening force were applied to the position of thoracic and lumbar scoliosis. The maximum correction rates of thoracic and lumbar scoliosis were 78% and 82%, respectively. (2) Topology optimization analysis of brace was carried out by setting 10 groups of optimization parameters. According to the results, the brace was reduced properly, and then the model was transferred to a 3D printer to print the brace quickly. (3) The patient wore brace and gave feedback. According to the feedback of evaluation, the spine brace designed digitally is more suitable for patients and has higher correction rate. (4) The scheme of making spine brace by using 3D printing is feasible, and it can provide reference for the follow-up application of 3D printing brace in clinical rehabilitation.

Key words: scoliosis brace, 3D printing, topology optimization, adolescent idiopathic scoliosis, molten deposition modeling technology, computer-aided engineering, personalized brace, biomechanics

CLC Number:

R459.9|R445|R682.3

Zhang Yufang, Guan Tianmin, Guo Qiaoge, Zhang Yufen, Guo Yanli. Digital design of personalized scoliosis orthopedic braces based on 3D printing technology[J]. Chinese Journal of Tissue Engineering Research, 2019, 23(36): 5824-5829.

Figures/Tables 7

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