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- 2017
骨皮质切开术通过促进成骨影响大鼠牙齿快速移动安全性的研究
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Abstract:
摘要 目的:研究骨皮质切开术对大鼠正畸牙移动的影响及其组织学改建机制。方法:选用健康未孕雌性SD大鼠48只,随机分为骨皮质切开手术组和对照组。在手术组大鼠行骨皮质切开术,对照组大鼠行对照手术后,构建正畸牙移动模型。在牙移动0、1、3、7 d分别处死2组大鼠各6只。测量牙移动距离并制备组织学切片行HE染色、骨钙素及Runx2免疫组织化染色。采用SPSS16.0 软件包对数据进行统计分析,P<0.05为差异有显著性。结果:骨皮质切开组大鼠在移动3 d后牙移动速度大于假手术组大鼠(P<0.05)。牙移动第3天和第7天,手术组大鼠张力区新骨面积大于假手术大鼠(P<0.05),同时,此时手术组张力区骨钙素阳性成骨细胞增加(P<0.05)。手术组大鼠牙移动3 d及7 d时张力区Run2表达均高于假手术组(P<0.05)。结论:骨皮质切开术加速正畸牙移动的同时促进牙周组织成骨活性,这可能是保障牙移动安全性的关键因素
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