生物医学工程研究2011，Vol.30Issue(1)：49-52,4.
正常与病态股骨头应力松弛特性的对比分析
Stress Relaxation Equation of Normal and Pathological Femoral Head Cancellous Bone
王溪原 1张远石 1苑福生 1孟庆阳 2马洪顺3
作者信息
- 1. 中国医科大学附属第四医院骨科,沈阳,110032
- 2. 吉林大学第二医院,长春,130042
- 3. 吉林大学南岭校区工程力学系,长春,130022
- 折叠
摘要
Abstract
To compare the nature of stress relaxation of normal femoral head and necrosis femoral head to provide the stress relaxation parameter for the artificial joint research and the hip replacement. The stress relaxation experiment was carried on the Daojin electron universal testing machines of Japan with respecticrely 8 specimens of normal femoral head and necrosis femoral head. The experiment was carried on in 36.5℃ simulating human body temperature,5％s strain rate of increased was imposed on the specimen strain, the hypothesis time as 7 200 s,100 empirical data were gathed. Three parameter model computation stress relaxation equation was used. The stress relaxation curve and stress relaxation quantity at 7 200 s were observed. The stock bone had rapid changes during the first 600 s, afterwards the stress decreased slowly,the stress relaxation quantity of the normal group at 7 200 s was 0.31 MPa, the stress relaxation quantity of the morbid state group at 7 200 s was 0.22 MPa, the stress relaxation quantity of the morbid state group at 7 200 s was obviously lower than the normal group ( P ＜ 0.05) .After stock bone necrosis disrupted the normal arrangement of trabecular bone,the bone quantity lost, thus had the influence on the counter stressrelaxation characteristic. The stress relaxation data may proves that stress relaxation characteristic of necrosis stock bone is bad.关键词
正常/病态/股骨头/应力松弛/对比分析Key words
Normal/ Morbid state/ Stock bone/ Stress relaxation/ Contrast analysis分类
医药卫生引用本文复制引用
王溪原,张远石,苑福生,孟庆阳,马洪顺..正常与病态股骨头应力松弛特性的对比分析[J].生物医学工程研究,2011,30(1):49-52,4.
