骨转移瘤治疗中骨盆假体的生物力学数值分析  

Numerical biomechanical analysis of pelvic prostheses in treatment of bone metastases

作　　者：何宜谦 钱程 邱恩铎[2] 于申[1] 王玉名[2] HE Yiqian;QIAN Cheng;QIU Enduo;YU Shen;WANG Yuming(Department of Engineering Mechanics,State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,Liaoning,China;Department of Bone and Soft Tissue Tumor Surgery,Liaoning Cancer Hospital&Institute,Shenyang 110042,China)

机构地区：[1]大连理工大学工程力学系工业装备结构分析优化与CAE软件全国重点实验室,辽宁大连116024 [2]辽宁省肿瘤医院骨与软组织肿瘤科,沈阳116044

出　　处：《计算机辅助工程》2024年第2期10-16,共7页Computer Aided Engineering

基　　金：国家自然科学基金(12072063);大工-附属肿瘤医院医工交叉联合基金(DUT21YG129);辽宁省兴辽英才计划(XLYC2002108);大连市支持高层次人才创新创业项目(2021RD16)。

摘　　要：为研究骨盆骨肿瘤手术后骨盆假体的强度和稳定性,针对具体病例建立骨盆-假体结构系统的有限元模型,分别进行静力和动力问题计算。静力工况为双腿和单腿站立状态,动力工况为骨盆不同方向、不同高度跌落以及不同固定方式的跌落过程,通过数值模型分析骨盆-假体结构系统不同工况的受力和变形。计算结果显示:在3种站立姿态下,结构最大应力均小于骨骼假体材料的强度极限,患侧的应力更大;骨盆从5 m高处跌落造成的最大应力可能超过骨骼和假体材料的屈服强度;螺钉固定方式对应力分布影响也较大。To ensure the strength and stability of pelvic prosthesis,a finite element model of the pelvic prosthesis structure system for specific cases is built,and its static and dynamic issues are calculated separately.The static working condition is a standing postures with two legs and one leg,and the dynamic working condition is a pelvis falling process in different directions and heights,as well as the same falling posture but different fixing methods.The numerical models analyze the stress and deformation of the pelvic-prosthesis structure system under different working conditions.The computing results show that the maximum stress of the structure is less than the strength limit of the bone prosthesis material in all three standing postures,and the stress on the affected side is greater;the maximum stress caused by the falling of pelvis from 5 m height may exceed the yield strength of the bone and prosthesis materials;the screw fixation method also has a significant impact on stress distribution.

关 键 词：骨肿瘤 骨盆-假体结构 固定方式 生物力学 动力学 站立模拟 跌落模拟 有限元 

分 类 号：R323.5[医药卫生—人体解剖和组织胚胎学] TB115.1[医药卫生—基础医学]