| 骨折愈合的应力适应性研究 |
|
摘要点击次数: 2411
全文下载次数: 1174
|
|
|
| 期刊信息：《中国骨伤》1994年，第7卷，第3期，第16-18页 |
| DOI：doi:10.3969/j.issn.1003-0034.yyyy.nn.zzz |
| 基金项目: |
|
| 中文摘要:设计了生物适应性很强的力学控制装置──滑动机械加载控制器,对骨折断端没有应力遮挡,把肌肉动力与肢体负重力作为执行力学加载的源动力,通过压力传感器、多导传感放大器动态记录生理活动状态下断端受力情况及愈合过程中断端的应力状态。结果表明,同一时期内骨折断端压力随肌肉收缩及步态发生变化,不同愈合时间断端压力均值随时间的增加而逐渐增加,而滑动机械加载控制器上承载由术后当日平均2.4kg逐渐变小至术后五周平均0.78kg.同时,通过解剖显微镜进行断端骨痂显微观察,显示断端完全由外骨痂包绕,从而认为骨折断端压力变化是肢体功能恢复,断端骨痂承受载荷的表现,提示临床骨折固定后应适时地进行功能锻炼,肌肉收缩、患肢负重可为断端提供最好的力学环境──生理应力状态。 |
| 【关键词】骨折愈合 生物力学 |
| |
| A study on stress adaptability of fracture healing |
|
| ABSTRACT A sliding mechanical loading controller with strong physiological adaptability was designed without stress shading of the fracture site. The muscle force and body weight exerted on the extrimity thus were treated as the dynamic source of the mechanical loading.The force condition of the fracture site during functionally moving and over whole healing progress of the rabbits were recorded with force transducers and related amplifiers etc.The experiments indicated that the compressive force of the fracture site changed in relation with the muscle contraction and moving of the gait,the mean load increased along with the time prolonged,and the loading on the sliding mechanical loading controller gradually decreased from 2.4 kg in average on the day of operation to that of 0.78 kg till 5 weeks on the fractured tibia during healing process.On the other hand,under anatomical microscopic observation, the original fracture site is thoroughly enrolled by external callus,thus it is realized that the force changed on the fracture site indicating functional recovery of the extremity,and a reflection of compressive loading sustained by the callus on the fracture site.It is suggested that the muscle contract during functional training in time and body weight bearing after fixation of the fracture may offer an optimized mechanical environment,a physiological stress condition. |
| KEY WORDS Fracture healing Biomechanics |
| |
| 引用本文，请按以下格式著录参考文献： |
| 中文格式: | 赵勇,尚天裕,钟红刚.骨折愈合的应力适应性研究[J].中国骨伤,1994,7(3):16~18 |
| 英文格式: | Zhao Yong,Shang Tian-yu.A study on stress adaptability of fracture healing[J].zhongguo gu shang / China J Orthop Trauma ,1994,7(3):16~18 |
|
| 阅读全文 下载 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
