期刊导航

论文摘要

牙槽骨垂直牵张后骨段颊向移位对牵张成骨早期的影响

The impact of changing the buccal position of the transported bone on early bone formation after alveolar vertical distraction

作者:孙明 律娜 黄代营 陈松龄 颜雨春 张令达

Author:Sun Ming1, Lü Na1, Huang Daiying2, Chen Songling2, Yan Yuchun1, Zhang Lingda1

收稿日期:2011-12-25          年卷(期)页码:2011,29(06):646-646-650

期刊名称:华西口腔医学杂志

Journal Name:West China Journal of Stomatology

关键字:牵张成骨,双向牵张器,牙槽骨增高,

Key words:distraction osteogenesis,bidirectional distractor,augmentation of alveolar bone,

基金项目:

广东省科技厅科研基金资助项目(2009B05700025;2011-B010200008)

中文摘要

目的研究牙槽骨垂直牵张成骨后,移动骨段一步颊向移位较大距离对牵张成骨的早期影响。方法自行研制双向牵张器。杂种犬8只,拔除双侧下颌前磨牙1个月后,骨切开放置牵张器,间歇7 d后以每天1 mm的速度牵张,垂直牵张高度为6 mm。垂直牵张完成后,每只犬的随机一侧作为实验侧,于牵张结束后第2天一步将移动骨段颊向移位3 mm,另一侧作为对照侧不改变移动骨段的颊向位置。7 d后处死动物并行墨汁灌注,进行临床检查,双能X线检查牵张区骨密度,组织学检查及图像分析血管面积比率。结果实验动物均能很好地耐受实验操作,实验侧移动骨段在垂直牵张后可较容易地颊向移位3 mm,实验侧与对照侧牵张区内都有新生骨组织生成。双能X线检查显示:实验侧与对照侧的平均骨密度无统计学差异。组织学检查显示:实验侧与对照侧有平行于牵张方向的血管生成,未见明显的血管破坏,图像分析血管面积比率无统计学差异。结论在一定范围内,牙槽骨垂直牵张后移动骨段一步颊向移位可对牵张区新生骨组织塑形,避免轴向移位。这种操作并没有明显破坏其早期的血管生成及成骨潜能。

英文摘要

Objective To assess the effects of 1-step method of changing the buccal position of the transported bone after distraction on early bone formation. Methods The custom-made bidirectional distraction devices were used. Total of 8 adult mongrel dogs were procured. The bilaterally mandible premolars were extracted. After 1 month, the complete osteotomy was performed and the devices were placed. The gradual distraction was started after 1 week latency at the rate of 1mm per day, total 6 mm in height was achieved. The 1-step method of changing the buccal position of the transported bone was performed the day after the vertical distraction period in one side of the animals, and the other side as the controlled side. All animals were killed after a 7 days consolidation. The vascular system was stained post mortem carbon ink perfusion to assess possible damages. Quantitative evaluations of bone density were performed with dual-energy X-ray absorptiometry(DEXA), analysis of the ratio of vascular square was conducted in a computer. Results All animals tolerated the procedures well. After vertical distraction, the tested side can be moved 3 mm in buccal direction. DEXA examination showed that the density of the distracted bone was no statistical difference in both the tested and the controlled side. Vascular damage was not observed, and there was no statistical difference in the ratio of vascular square by analyzing the histological section in computer. Conclusion In some extent, 1-step method of changing the buccal position of the transported bone after distraction can mold the regenerate bone to correct the axial displacement, without endangering early callus formation and vascularization.

上一条:口腔白色假丝酵母菌毒力因子与随机扩增多态性DNA条带的多元回归分析

关闭

Copyright © 2020四川大学期刊社 版权所有.

地址:成都市一环路南一段24号

邮编:610065