摘要
目的：探讨循环应力对骨折愈合的生物力学影响。方法：应用循环应力刺激仪，对８６只新西兰大白兔进行促进桡骨骨折愈合的动物实验研究。设对侧桡骨对照组。定期取标本做三点弯曲应力、弯曲力矩、抗弯刚度及骨痂横截面积等生物力学测定。结果：１２ｄ后，两组间弯曲力矩有显著性差异（Ｐ＜００１）。１５ｄ后弯曲正应力、抗弯刚度及骨痂横截面积出现显著性差异（Ｐ＜００１）。特别是抗弯刚度，差别＞４７％。提示循环应力刺激可提高骨痂的材料特性与结构特性。结论：加强其抗弯曲能力与抗破断能力，能促进骨折的愈合。
Objective:To
study the biomechanical effects of circular stress on fracture healing.Method:The animal
models of radius fracture were made in 86 New Zealand rabbits.One sides of radius were
stimulated by circular stress with criteria instrument and the other sides of were control
group.The threepoint bending stress,flexural rigidity,and the average of cross section of callus
were measured.Results:Circular stress promotes construction characteristics and material
characteristics of callus,ability of antibending and antibreaking of the callus.Conclusion:Circular
stress may promote fracture healing.
出处
《中国矫形外科杂志》
CAS
CSCD
1999年第6期442-444,共3页
Orthopedic Journal of China
关键词
生物力学
骨折愈合
循环应力
Fracture healingBiomechanicsCircular stress
