髋关节外展角度对股骨颈应力分布的影响  

Influence of Different Abduction Angles of Hip Joint on Stress Distribution of Femoral Neck

作　　者：张海峰[1] 宋翠荣[1] 赵文涛[1] 尹爱华[1] 朱建忠[1] 任国山[2] 

机构地区：[1]沧州医学高等专科学校解剖教研室,沧州061001 [2]河北医科大学解剖教研室,石家庄050017

出　　处：《生物医学工程学杂志》2016年第2期274-278,共5页Journal of Biomedical Engineering

基　　金：沧州市科技支撑计划项目资助(151302001)

摘　　要：关节应力分布与外展角度关系密切,研究二者内在联系可为临床关节损伤的预防、治疗提供力学依据。本研究应用逆向工程软件Mimics14.0,基于正常人体髋关节CT图像数据,经一系列处理,建立髋关节三维模型;再划分网格,赋材质,生成三维有限元模型;再导入有限元分析软件Ansys13.0,加载体重负荷,求解、计算正立位与髋关节外展5°、10°、15°、20°、25°、30°等7个体位下股骨颈的应力值,并统计分析。结果表明:正立位或外展某一不同角度下,股骨颈内、外侧区域的应力值均高于前、后方区域;随外展角度的增加,股骨颈前方区域应力值基本不变,后方区域应力值逐渐减小,内、外侧区域的应力值逐渐增大,外侧区域变化较明显。股骨颈应力大部分集中于内、外侧皮质,髋关节外展可导致应力分布发生变化,为髋关节损伤患者选取合理的手术方案及预防举措具有指导作用。The stress distribution and different abduction angles have a close relation to the hip joint.The purpose of this study is to provide biomechanical evidence for the treatment or precaution of hip joint injuries.A three-dimensional model of the hip was established through a series of processing based on the normal human hip joint computed tomograph（CT）image data which were applied to reverse engineering software Mimics14.0in this study.Firstly,a three-dimensional finite element model was generated with meshing and assigned material and then it was imported into the finite element analysis software Ansys13.0.At last the stress at the femoral neck was solved,computed and analyzed in the positive orthostatic position with 7hip abduction angles of the hip joint：0°,5°,10°,15°,20°,25°,and 30°,respectively.The results showed that the stresses of femoral neck and outer region were obviously higher than those of front and rear area of the neck of femur in the upright position or abduction of a different angle.With the increase of abduction angle,femoral neck in front of the regional stress value basically unchanged and rear area decreased,but the more obvious changes occurred in the outer region although the stress of inner and outer area also increased gradually.The hip abduction may cause changes in stress distribution because of the femoral neck stress mostly concentrated in the inner and outer cortex,and therefore it has an important role in guiding for hip surgery injury patients to choose the most reasonable solutions and prevention initiatives.

关 键 词：髋关节 外展 生物力学 有限元分析 

分 类 号：R684[医药卫生—骨科学] R318.01[医药卫生—外科学]