文章摘要

胸腰椎骨折单侧固定的有限元探讨

作者: 1,2陈锴, 2邵杰, 3王家宝, 4徐海栋
1 第二军医大学学员旅,上海 200433
2 第二军医大学附属长海医院骨科,上海 200433
3 宿州市人民医院骨科,安徽 宿州 234000
4 解放军南京总医院骨科,南京 210002
通讯: 徐海栋 Email: xuhaidong1980@163.com
DOI: 10.3978/j.issn.2095-6959.10.3978/j.issn.2095-6959.2017.09.026
基金: 南京军区医学科技创新课题, 12MA080 南京军区南京总医院军事医学培育课题, YYMS2014002

摘要

目的:通过有限元运算方法探讨胸腰椎骨折单侧固定的生物力学效果和可行性。方法:采用正常健康志愿者数据构建胸腰椎骨折有限元模型,装配单侧固定系统和双侧固定系统,对其进行有限元运算模拟。结果:通过有限元运算获得的结果分析,采取单侧固定的静态应力、最大应力与最大位移都明显提示较双侧固定不稳定(P<0.05)。结论:胸腰椎骨折采取单侧固定后其有限元运算的结果提示其生物力学效应较差,在临床应用中单侧固定选择需要慎重,避免矫形复位手术的失败。
关键词: 胸腰椎骨折 单侧固定 生物力学 静态应力 应力云图 位移量图

Finite element analysis of unilateral fixation of thoracolumbar fractures

Authors: 1,2CHEN Kai, 2SHAO Jie, 3WANG Jiabao, 4XU Haidong
1 Cadet Brigade, Second Military Medical University, Shanghai 200433
2 Department of Orthopedics, Changhai Hospital, Secondary Military Medical University, Shanghai 200433
3 Department of Orthopedics, Suzhou People’s Hospital, Suzhou Anhui 234000
4 Department of Orthopedics of Nanjing General Hospital, PLA, Nanjing 210002, China

CorrespondingAuthor: XU Haidong Email: xuhaidong1980@163.com

DOI: 10.3978/j.issn.2095-6959.10.3978/j.issn.2095-6959.2017.09.026

Abstract

Objective: Thoracolumbar fractures posterior orthopedic fixation program there are many, but unilateral fixation in clinical practice is not selected by physicians. The finite element method can simulate the biomechanical effects of internal fixation surgery in the computer. The biomechanical effect and feasibility of unilateral fixation of thoracolumbar fractures were explored by this method. Methods: The finite element model of thoracic and lumbar vertebrae fractures was constructed by normal healthy volunteer data. The unilateral fixation system and bilateral fixation system were used to simulate the finite element model. Results: The static stress, maximum stress and maximal displacement of unilateral fixation were significantly higher than those of bilateral fixation (P<0.05), which were obtained by finite element analysis. Conclusion: Unilateral fixation of thoracolumbar fractures after its finite element operation results suggest that the biomechanical effects of poor clinical application of unilateral fixed choice need to be careful to avoid the failure of orthopedic reduction surgery.
Keywords: thoracolumbar fracture unilateral fixation biomechanics static stress stress cloud displacement diagram