有限元法预测支具治疗青少年特发性脊柱侧凸的效果  

Predict therapeutic efficacy of brace for adolescent idiopathic scoliosis using finite element method

作　　者：唐明星[1] 张宏其[1] 王永福[1] 赵迪[1] 刘少华[1] 陈凌强[1] 郭超峰[1] 王昱翔[1] 

机构地区：[1]中南大学湘雅医院脊柱外科,湘雅脊柱外科中心,湖南410008

出　　处：《脊柱外科杂志》2010年第2期108-113,共6页Journal of Spinal Surgery

基　　金：湖南省科技厅重点项目(2009SK2012);湖南省科技厅科技计划一般项目(2007SK3036);湖南省卫生厅科研基金课题(B2006-040)

摘　　要：目的利用有限元方法分析支具治疗后椎间盘凸侧和凹侧椎间盘应力分布的变化,预测支具治疗效果。方法基于已建立的Lenke1A型特发性脊柱侧凸模型,利用有限元方法分析支具治疗后主胸弯椎间盘凸侧和凹侧椎间盘应力分布的变化,并应用公式计算1年后椎体高度增加值和椎体楔形病变增加的角度值。结果随着横向矫形力的增加,T6～11椎体的楔形病变逐渐减小,预计1年后总的椎体楔形病变也呈减小趋势。其中在加载100N矫形力后,主胸弯椎体楔形病变角度总和被逆转为负数。结论利用有限元方法研究脊柱侧凸椎间盘凸侧和凹侧的应力,并应用凸侧和凹侧应力值预测支具治疗的效果,为预测支具治疗效果提供了一种新的方法 。Objective To analyze the distribution change of disc stress at the convex side and concave side in order to predict the curative effect of brace with the finite element method. Methods The disc stress changes of the convex side and concave side at main thoracic curve were analyzed based on a constructed finite model of Lenke 1A-type adolescent idiopathic scoliosis with finite element method,and the increased height and wedge angle of vertebrae after 1 year were calculated according to formula. Results With the increase of transverse orthopedic force,the wedge angle of T6~11 decreases gradually,and the change of total wedge angle was predicted to be in a downward trend. And when the force added up to 100 N,the change of total wedge angle in main thoracic curve was predicted to become negative. Conclusion Finite element method can be applied to research disc stress in the convex side and concave side,and the disc stress in the convex side and concave side can be applied to predict therapeutic efficacy of the brace,which provides a new method for predicting therapeutic efficacy of the brace.

关 键 词：青少年 脊柱侧凸 支架(骨科) 有限元分析 

分 类 号：R682.3[医药卫生—骨科学]