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人股骨密质骨横断面径向微动行为 被引量:7
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作者 蔡振兵 朱旻昊 +2 位作者 高姗姗 于海洋 周仲荣 《上海交通大学学报》 EI CAS CSCD 北大核心 2008年第5期707-710,共4页
在径向微动试验机上,采用球-平面接触方式,对新鲜人股骨密质骨的轴向断面进行了不同法向载荷(Fn=100~300 N)条件下的径向微动体外试验.在其动力学分析的基础上,对磨痕进行了观察,并采用纳米压痕方法对哈佛氏系统的骨板进行了测试.结... 在径向微动试验机上,采用球-平面接触方式,对新鲜人股骨密质骨的轴向断面进行了不同法向载荷(Fn=100~300 N)条件下的径向微动体外试验.在其动力学分析的基础上,对磨痕进行了观察,并采用纳米压痕方法对哈佛氏系统的骨板进行了测试.结果表明:径向微动条件下,在密质骨哈佛氏系统中可观察到3种典型裂纹(即放射状、环状和连接裂纹)形态;随着哈佛氏骨板逐渐过渡到间骨板间,其硬度和弹性模量逐渐增加.骨表面产生微裂纹和组织体剥落是密质骨径向微动的主要损伤机制.哈佛氏系统的特殊结构对密质骨的径向微动损伤行为有重要影响. 展开更多
关键词 股骨密质骨 径向微动 纳米压痕 哈佛氏系统
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人皮质骨径向微动损伤有限元分析与试验验证 被引量:4
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作者 刘娟 沈火明 +1 位作者 蔡振兵 朱旻昊 《润滑与密封》 CAS CSCD 北大核心 2010年第9期13-17,共5页
对骨哈佛氏系统径向微动进行有限元分析,分析结果显示:哈佛氏管、环骨板处和穿过环骨板和骨间质组织等多处有应力集中现象发生,高的应力梯度可导致哈佛氏骨管处、环骨处和骨间质组织等多处裂纹的萌生;高载荷条件下,穿过骨间质,联接相邻... 对骨哈佛氏系统径向微动进行有限元分析,分析结果显示:哈佛氏管、环骨板处和穿过环骨板和骨间质组织等多处有应力集中现象发生,高的应力梯度可导致哈佛氏骨管处、环骨处和骨间质组织等多处裂纹的萌生;高载荷条件下,穿过骨间质,联接相邻骨单位的较大塑性区也是裂纹萌生的原因。采用球-平面接触模式,在高精度液压伺服微动实验机上,对人股骨皮质骨的轴向断面的径向微动行为进行试验研究。用位移-载荷曲线对其动力学进行分析;采用LCSM、SEM等方法对磨痕进行观测分析。结果表明:径向微动条件下,在股骨密质骨中可观察到3种典型裂纹,即放射状裂纹、环状裂纹和联接裂纹。有限元分析和试验分析结果具有很好的一致性,试验结果充分验证有限元分析。 展开更多
关键词 股骨密质骨 径向微动 裂纹 有限元分析
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Effect of proximal femoral osteoporosis on cementless hip arthroplasty: A short-term clinical analysis 被引量:4
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作者 LOU Xian-feng LI Yu-hong LIN Xiang-jin 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2007年第1期76-80,共5页
Objective: The aim of this retrospective investigation was to explore the influence of femoral osteoporosis on short-term curative effects ofcementless hip arthroplasty and to evaluate the femoral metaphyseal bone mi... Objective: The aim of this retrospective investigation was to explore the influence of femoral osteoporosis on short-term curative effects ofcementless hip arthroplasty and to evaluate the femoral metaphyseal bone mineral density (BMD) for femoral osteoporosis in order to guide prosthesis choice and rehabilitation. Methods: We performed 127 total arthroplasty operations between June 1999 to February 2003 and investigated 49 cementless hip replacements with the Metalcancellous cementless Lubeck Ⅱ system being used in all hips. There were twenty men and twenty-nine women whose mean age at the time of the operation was 60 years (range, 52-81 years). The patients were divided into osteoporosis or normal groups according to the femoral metaphyseal BMD measured preoperatively. The average duration of follow-up was 30 months (range, 8-52 months). We evaluated all of the patients from a clinical standpoint with use of a standard-terminology questionnaire with respect to the short-term curative effects and patients' satisfaction. Hip pain status and functional ability were important indicators of treatment efficacy. Results: Harris hip score and patients' satisfaction in femoral osteoporosis patients who underwent noncemented hip arthroplasty were lower (P=0.004, P=0.03) while the incidence of thigh pain was higher (P=0.03) than the patients with non-osteoporosis. Conclusion: The higher incidence of pain, as well as the decrease in function experienced by the patients in osteoporosis group, supports the case that cementless arthroplasty is not a better choice for those patients and that we had better select prosthesis based on the femoral metaphyseal BMD. 展开更多
关键词 Cementless hip arthroplasty OSTEOPOROSIS Bone mineral density (BMD) Curative effect
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