冷热循环对牙本质黏结界面纳米渗漏的影响

Effects of thermocycling on nanoleakage within resin-dentin interfaces

目的 :探讨冷热循环对牙本质黏结界面纳米渗漏的影响。方法 :用透射电镜观察 3种黏结系统 (AdperPrompt,U -Bond ,OptiBond)有无冷热循环作用下 ,牙本质黏结界面银沉积情况 ,并用NIH图像分析软件量化处理 ,以银沉积面积占混合层面积的百分比来评价纳米渗漏程度。结果 :各实验组和对照组银沉积面积百分比分别为AP(9.2 7% ,8.96 % )、UB(9.6 2 % ,8.75 % )、OB(8.18% ,9.2 0 % )。结论 :研究中所用黏结系统都不能避免纳米渗漏产生 ;短期冷热循环对自酸蚀黏结系统黏结界面纳米渗漏有增加的趋势。

AIM:To evaluate the effects of thermocyclingon nanoleakage within resin-dentin interfaces.METHODS:Specimen s of three bonding systems(Adper Prompt,U-Bond,Opti Bond)thermocycled or not w ere studied with transmission electron microscopy (TEM) to identify the amount a nd distribution of silver uptake.They were then subjected to image analysis by N IH Image PC.Leakage scores of each restoration were calculated as the percentageof the total area of hybrid layer that was penetrated by silver nitrate. RESULTS:The ratios of the leakage of the experiment and control group s were AP( 9.27%,8.96%),UB(9.62%,8.75%),OB(8.18%,9.20%) respectively. CONCLUSION:All the bonding systems in this study couldn′t resis t nanoleakage;short-term thermocycling on self-etching systems may improve the n anoleakage within resin-dentin interfaces. [