THE EFFECT OF STRESS-RELAXATION PLATE FIXATION ON THE REMODELING OF THE CORTEX UNDER PLATE
- VernacularTitle:应力松弛接骨板固定对板下皮质骨改建影响的扫描电镜观察
- Author:
Xianlong ZHANG
;
Kerong DAI
;
Tingting TANG
- Publication Type:Journal Article
- From:
Chinese Journal of Reparative and Reconstructive Surgery
2001;15(1):1-4
- CountryChina
- Language:Chinese
-
Abstract:
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.
