尺骨茎突骨折有限元模型的建立与力学分析  

Establishment and Mechanical Analysis of the Finite Element Model of the Ulnar Styloid Process Fracture

作　　者：岳肖华 李晏乐 程灏[1] 刘广伟 孙研[1] 成永忠[1] 宋跃[1] 关继超[1] 李永耀[1] YUE Xiaohua;LI Yanle;CHENG Hao;LIU Guangwei;SUN CHENG Yongzhong;SONG Yue;GUAN Jichao;LI Yongyao(Wangjing Hospital,China Academy of Chinese Medical Sciences,Beijing 100102,China;Beijing Key Laboratory of Traditional Chinese Medicine,Beijing 100700,China)

机构地区：[1]中国中医科学院望京医院,北京100102 [2]中医正骨技术北京市重点实验室

出　　处：《中国中医骨伤科杂志》2018年第10期6-9,共4页Chinese Journal of Traditional Medical Traumatology & Orthopedics

基　　金：中央级公益性科研院所基本科研业务费专项资金资助项目(ZZ11-084);国家自然科学基金面上项目(81273785)

摘　　要：目的:模拟尺骨茎突骨折的机制,构建包括主要骨骼和韧带的尺骨茎突骨折的有限元模型,为尺骨茎突骨折的基础及临床研究提供可靠的工具。方法:基于正常人体腕关节的CT影像及各组织解剖特点、材料参数,建立筋骨结构完整的腕关节三维有限元模型;然后根据尺骨茎突骨折的相关特点,进行截骨造模,建立筋骨结构完整的尺骨茎突骨折有限元模型,计算和分析下尺桡关节的应力分布、相对位移变化及尺骨茎突骨折端位移变化情况。结果:建立了387 763个节点,1 094 717个单元的骨骼、软骨、韧带、骨间膜等结构完整的尺骨茎突骨折有限元模型,不同工况下计算得出的下尺桡关节的应力分布、相对位移变化及尺骨茎突骨折端位移变化情况与临床实际符合。结论:建立的腕关节三维有限元模型可用于尺骨茎突骨折的力学机理分析,计算出的下尺桡关节的应力分布、相对位移变化及尺骨茎突骨折端位移变化情况符合临床中尺骨茎突骨折分型的描述,可用于尺骨茎突骨折力学变化的可视化分析及临疗效评估研究。Objective：To simulate the mechanism of ulnar styloid process fracture and construct the finite element model of ulnar styloid process fracture including the main bones and ligaments,provide a reliable tool for the basic and clinical research of ulnar styloid process fracture.Methods：Based on the CT images of the normal human wrist and the anatomical characteristics and material parameters of each tissue,a three-dimensional finite element model of the wrist with complete tendon and bone structure was established.The stress distribution,relative displacement and fracture displacement of the ulnar styloid process were observed.Results：A complete finite element model of ulnar styloid process fracture with387 763 nodes and 1 094 717 elements was established.The stress distribution and relative displacement of the lower ulnar-radial joint and the displacement of the end of the ulnar styloid process fracture calculated under different working conditions were consistent with the clinical practice.Conclusion：The three-dimensional finite element model of wrist joint can be used to analyze the mechanical mechanism of ulnar styloid process fractures.The stress distribution,relative displacement and displacement of the lower ulnar-radial joint calculated accord with the clinical description of ulnar styloid process fractures.It can be used to visualize the mechanical changes of ulnar styloid process fractures for analyzing and evaluating of clinical efficacy.

关 键 词：尺骨茎突骨折 三维有限元模型 有限元分析 

分 类 号：R-33[医药卫生]