摘要
目的对山羊下颌骨缺损进行两焦点与三焦点牵张,比较两种方式的新骨成骨量。方法将8只成年山羊随机分成两组,每组4只,分别采用两焦点和三焦点牵张成骨术来进行骨缺损修复。牵张结束后固定8周后处死两组动物取牵张区新生骨组织标本进行X线、组织学、骨密度分析。结果两组牵张区均有新骨形成,质无明显区别,在量的比较上,三焦点组X线、组织学、骨密度测定的结果均优于两焦点组,骨密度测定分析结果有统计学意义(P<0.05)。结论三焦点牵张成骨在大面积颌骨缺损的修复中新骨的成骨量优于两焦点牵张成骨。
Objective To compare the differences of distraction osteogenesis（bifocal distraction, trifocal distraction） in goat mandibular defect and explore the new bone mass of distraction osteogenesis in the treatment of mandibular defect. Methods 8 adult goats were randomly divided into bifocal distraction group （n = 4） and trifocal distraction group（n = 4） and killed 8 weeks after completion of distraction and corresponding time in two groups. Gross X-Ray, histological and bone densitometry were performed to evaluate the state of the bone healing and regeneration. Results The newly generated bone substance showed no obvious difference in distraction gap, but newly generated bone was quantitative in trifocal distraction. In comparison with the bifocal distraction, Gross X-ray, histological results and bonedeusitometry were remarkably higher than those in bifocal distraction （ P 〈 0.05 ）. Conclusions The technique of trifocation distraction is better than that of bifocal distraction in a large area mandibular defect.
出处
《口腔医学》
CAS
2008年第4期177-179,共3页
Stomatology
基金
安徽省科学技术厅重点科研项目(05023084)
关键词
牵张成骨
两焦点牵张成骨
三焦点牵张成骨
骨密度
distraction osteogensis
bifocal distraction
trifocal distraction
bone density
