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中文摘要：
基于尸体层切图像建立了一个肩关节三维有限元模型,包括肱骨、肱骨头软骨、肩胛骨、肩胛盂和8块肌肉,其中肌肉共用50根弹簧单元模拟,肱骨头软骨、肩胛盂和肩胛骨基本用六面体单元划分,提高了有限元分析的精度.用该模型分析了肱骨在外旋运动中盂肱关节的关节力及其接触面的应力分布情况,其中最大关节力和最大接触应力分别为140.08 N和1.976 MPa,并有效地确定了关节面应力集中的位置在关节盂的后侧.研究结果对临床诊断关节软骨磨损严重而导致骨关节炎疾病、关节盂骨折的发病机理和假体的设计有一定的指导意义.
英文摘要：
Based on the cadaver crysectional images, a three-dimensional finite element model of a healthy cadaveric shoulder was developed including humerus, scapular, cartilage and eight muscles, which are simulated by 50 spring elements. To improve the analytical precision, hexahedral elements are used. Using the model, articular contact patterns of the normal glenohumeral joint were calculated during humeral external rotation, concluding the maximum joint reaction force is 140.08N and the maximum contact stress is 1. 976MPa, together with the contact areas which is important to both prosthetic design and the understanding of degeneration of articular cartilage.
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