The biomechanical performance of the night-time Providence brace: experimental and finite element investigations

撑杆 仰卧位 脊柱侧凸 柯布角 骨盆 曲率 胸腔 口腔正畸科 生物力学 有限元法 解剖 结构工程 医学 数学 外科 几何学 工程类
作者
Alireza Yahyaiee Bavil,Gholamreza Rouhi
出处
期刊:Heliyon [Elsevier BV]
卷期号:6 (10): e05210-e05210 被引量:2
标识
DOI:10.1016/j.heliyon.2020.e05210
摘要

The main goal of this study was to investigate the performance of a night-time Providence brace, which alters stress distribution in the growth plates and ultimately result in a reduced Cobb angle, from a biomechanical standpoint, using experimental and in-silico tools. A patient with a mild scoliosis (Cobb angle = 17) was chosen for this study. Applied forces from the Providence brace on the patient's rib cage and pelvis were measured using flexible force pads, and the measured forces were then imported to the generated FE model, and their effects on both curvature and stress distribution were observed. The measured mean forces applied by the brace were 29.4 N, 24.7 N, 22.4 N, and 37.6 N in the posterior pelvis, anterior pelvis, superior thorax, and inferior thorax, respectively, in the supine position. Results of the FE model showed that there is curvature overcorrection, and also Cobb angle was reduced from 17°, in the initial configuration, to 3.4° right after using the brace. The stress distribution, resulted from the FE model, in the patient's growth plate with the brace in the supine position, deviates from that of a scoliotic individual without the brace, and was in favor of reducing the Cobb angle. It was observed that by wearing the night time brace, unbalanced stress distribution on the lumbar vertebrae caused by the scoliotic spine's curvatures, can be somehow compensated. The method developed in this study can be employed to optimize existing scoliosis braces from the biomechanical standpoint.
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