| 松动对组配式半骨盆假体应力分布的影响 |
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| 引用本文： | 郝智秀,高相飞,姬涛.松动对组配式半骨盆假体应力分布的影响[J].清华大学学报(自然科学版),2012(1):1-4,9. |
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| 作者姓名： | 郝智秀 高相飞 姬涛 |
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| 作者单位： | 清华大学摩擦学国家重点实验室生物机械学分室;北京大学人民医院骨与软组织肿瘤治疗中心 |
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| 基金项目： | 国家自然科学基金资助项目(50875148) |
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| 摘 要： | 为了研究联接松动后组配式半骨盆假体应力分布的变化,建立了组配式半骨盆假体重建后的骨盆三维有限元模型,模型包含骶骨、髂骨、股骨、主要韧带结构及半骨盆假体。利用半骨盆模型模拟了在组配式半骨盆假体中单个和多个骨盆紧固螺钉松动时组配式假体的应力分布情况。计算结果表明:靠近骨盆弓状线处紧固螺钉的松动对组配式半骨盆假体应力分布影响最大;远离骨盆弓状线的紧固螺钉的松动对组配式假体应力分布影响较小。
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| 关 键 词： | 组配式假体 松动 骨盆重建 有限元 生物力学 |
Influence of stress distribution on connection loosening in modular hemipelvic prostheses |
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| HAO Zhixiu,GAO Xiangfei,JI Tao.Influence of stress distribution on connection loosening in modular hemipelvic prostheses[J].Journal of Tsinghua University(Science and Technology),2012(1):1-4,9. |
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| Authors: | HAO Zhixiu GAO Xiangfei JI Tao |
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| Institution: | 1.Division of Intelligent and Biomechanical System,State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China; 2.Musculoskeletal Tumor Center,People’s Hospital,Peking University, Beijing 100044,China) |
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| Abstract: | The changes in the stress distribution of pelvic and modular hemipelvic prostheses with loose connection bolts was analyzed using a three-dimensional finite element model of a reconstructed pelvis,including the sacrum,ilium,femur,the major ligament structure and the modular hemipelvic prostheses.The Von Mises stress distribution in the modular hemipelvic prostheses was simulated when one or more pelvic bolts loosed in the reconstructed hemi pelvic model.The results indicate that the most important factor affecting the stress distribution in the modular hemipelvic prostheses was the loosening of the pelvic bolts near the arcuate line.Loosening of pelvic bolts far from the arcuate line has little effect on the stress distribution in the modular hemipelvic prostheses. |
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| Keywords: | modular prostheses loosing pelvic reconstruction finite element biomechanics |
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