【作者】 张雷；

【导师】 许春姣； 彭解英；

【作者基本信息】 中南大学 ， 口腔临床医学， 2010， 硕士

【摘要】 目的：研究五倍子提取物对龈下刮治术后根面暴露牙本质小管的封闭作用,为临床上减轻患者龈下刮治术后牙本质过敏反应提供理论依据。方法：选择因重度牙周炎无法保留拔除的患牙120颗。以4g.L-1五倍子提取物为实验组,1g.L-1氟化钠为阳性对照,去离子水为阴性对照,分别对实验组、阳性对照组、阴性对照组中的90例离体牙进行根面刮治,另三十颗未做任何处理,粗糙度测量仪测量各根面的粗糙度,电镜下观察根面情况,比较各组根面结构变化。结果：1、五倍子组的粗糙度(Ra)(0.94±0.04μm)小于阴性对照组(1.53±0.08μm),也小于阳性对照组(1.10±0.08μm),且三组粗糙度均小于未处理组(2.01±0.09),差异有统计学意义(P<0.05)。2、未处理组根面粗糙,可见大片牙石；去离子水组根面有明显的划痕,可见大量的暴露的牙本质小管；氟化钠组根面亦可见明显的划痕,暴露的牙本质小管部分被封闭,在根面可见大小不一散在的指状结构；五倍子组根面未见明显的划痕及暴露的牙本质小管,在根面可见散在大小不一的小球样结构。结论：①五倍子提取物处理的根面粗糙度明显降低,较不利于菌斑的附着。②五倍子提取物具有封闭暴露的牙本质小管和修复受损牙骨质的作用。更多还原

【Abstract】 ObjectiveTo study the effect of Chinese gallnut water to close exposed dentinal tubules after subgingival scaling, providing a theoretical basis of reducing the root dentine sensitivity for clinical application.MethodsWe choised 120 teeth which can not be reserved because of severe periodontitis.4g.L-1 Chinese gallnut water for experimental group, 1g.L-1NaF for Positive control and Deionized water for Negative control.We carried out root surface scaling on isolated teeth, then measure the roughness of these teeth’s root surfaces by Roughness measuring instrument and observe surface conditions by Electron microscopy to compare the structural changes on the surface in each group.Results1、The roughness of Chinese gallnut group(0.94±0.04μm)are less than Negative control(1.53±0.08μm),and less than Positive control (1.10±0.08μm),and there was a significant difference between them.2、Root surface of the deionized water group had significant scratches,but also shows a large number of exposed dentinal tubules; NaF group also had significant root surface scratches, exposed dentinal tubules were partially closed and scattered finger-like structures are also visible on the root surface; gallnut water group didn’t have obvious scratches and exposed dentinal tubules, but can be seen scattered ball-like structure on the root surface.Conclusions1、The Chinese gallnut water can reduce the Ra of root surface after subgingival scaling.2、Chinese gallnut water can close exposed dentinal tubules and repair damaged cementum after subgingival scaling.更多还原