摘要
目的 探讨应力松弛接骨板固定对板下皮质骨改建的影响。方法 对 2 8只新西兰兔双侧胫骨干截骨 ,分别以应力松弛接骨板 (实验组 )和坚硬接骨板 (对照组 )固定 ,术后 2～ 48周采用扫描电镜观察板下皮质骨改建变化。结果 8周前 ,两组板下皮质骨均有不同程度疏松 ,表现为胶原排列紊乱及吸收腔形成 ,对照组疏松程度较实验组重。12周后 ,实验组胶原排列渐趋整齐 ,吸收腔变小 ;对照组逐渐发生松质骨化。结论 应力松弛接骨板减轻了板下皮质骨骨质疏松的发生 ,在不去除接骨板的情况下 ,可使疏松骨结构逐渐恢复。
Objective To explore the influence of stress relaxation plate(SRP) fixation on the remodeling of cortex under plate. Methods Twenty eight New Zealand rabbits were used in this study, the bilateral tibia were osteotomized in the middle and fixed with SRP (experimental group) and rigid plate (control group) respectively. The scanning electron microscopy was used to observe the bone remodeling process from 2 to 48 weeks after operation. Results There was cortex osteoporosis beneath plate in different degree in both experimental and control groups before 8 weeks, it showed as the disorganization of collagen fiber structure and formation of resorption cavities. In comparison, the osteoporosis degree in experimental group showed milder than that of the control group. After 12 weeks, the resorption cavities became smaller, and the structure of collagen fibers became regular with the alignment parallel to the long axis of cortex. In contrast to the experimental group, the bone osteoporosis under plate of control group exacerbated continuously. Conclusion Without removal of the bone plate, SRP fixation not only reduce the degree of plated bone osteoporosis, but also make the osteoporosic bone return to normal.
出处
《中国修复重建外科杂志》
CAS
CSCD
2001年第1期1-4,共4页
Chinese Journal of Reparative and Reconstructive Surgery
基金
国家自然科学基金!资助项目 (39470 6 98)&&
关键词
接骨板
内固定
骨改建
骨折
扫描电镜
Bone plate Internal fixation Bone remodeling Foundation item: National Natural Science
