袖套结构联合肿瘤型假体柄初始稳定性的有限元分析  

Primary Stability of Sleeve Structure Combined with Tumor-Type Prosthesis Stem:A Finite Element Analysis

作　　者：左金增[1] 田东牧 高原 胡永成[3] 张净宇 ZUO Jinzeng;TIAN Dongmu;GAO Yuan;HU Yongcheng;ZHANG Jingyu(Department of Trauma Orthopedics,the Second Hospital of Tangshan,Tangshan 063000,Hebei,China;Shandong Weigao Orthopaedic Device Co.,Ltd.,Weihai 264203,Shandong,China;Department of Bone and Soft Tissue Oncology,Tianjin Hospital,Tianjin 300211,China)

机构地区：[1]唐山市第二医院创伤一科,河北唐山063000 [2]山东威高骨科材料股份有限公司,山东威海264203 [3]天津市天津医院骨与软组织肿瘤科,天津300211

出　　处：《医用生物力学》2023年第4期724-729,共6页Journal of Medical Biomechanics

基　　金：天津市卫生健康科研项目(TJWJ2022MS024,TJWJ2021QN047);中国医药教育协会骨科骨质疏松创新奖励基金项目。

摘　　要：目的对新型梯形袖套联合不同长度(90、105、20、135 mm)、形状(直柄、曲柄)假体柄进行有限元分析,研究其初始稳定性的差异。方法建立股骨-袖套-假体有限元模型,设定其接触模式为面与面接触,模拟生理活动中单足站立、快速行走的加载条件,研究股骨-袖套-假体柄微动情况。结果单足站立及快速行走时,梯形袖套联合直柄微动值大于曲柄,当假体柄长度为120 mm时,微动峰值及微动平均值达高峰。梯形袖套联合直柄在单足站立及快速行走时微动平均值分别为(67.7±43.5)、(64.1±59.2)μm,微动峰值分别为121、146μm。随着假体柄长度及形状的变化,梯形袖套周围微动值保持不变。结论梯形袖套联合曲柄优于直柄,当假体柄长度为90 mm时,可保持最佳初始稳定性。Objective To make finite element analysis on a novel trapezoid sleeve combined with prosthesis stem by different length(90,105,20,135 mm)and shapes(straight and curved stem),and study the differences in their primary stability.Methods The finite element model of femur-sleeve-prosthesis was established,the contact mode was set as face-to-face contact,and the micromotion of femur-sleeve-prosthesis stem was studied by simulating the loading conditions of standing on one foot and fast walking in physiological activities.Results The micromotion of trapezoid sleeve combined with straight stem was larger than that of curved stem during standing on one foot and fast walking.The maximum and average micromotion reached the peak when the length of prosthesis stem was 120 mm.During standing on one foot and fast walking,the average micromotion of trapezoid sleeve combined with straight stem was(67.7±43.5)μm and(64.1±59.2)μm,and the maximum micromotion was 121μm and 146μm.The micromotion around the trapezoidal sleeve remained constant as the length and shapes of prosthetic stem changed.Conclusions The trapezoidal sleeve combined with curved stem is superior to that with the straight stem.When the length of prosthetic stem is 90 mm,the optimal primary stability can be maintained.

关 键 词：袖套 肿瘤型假体柄 初始稳定性 微动 

分 类 号：R318.01[医药卫生—生物医学工程]