摘要
目的:激光共聚焦显微镜下观察比较不同光固化模式下复合树脂固化后微渗漏的差别。方法:选取30个离体牙在颊面备4 mm×4 mm×2 mm窝洞,光固化树脂(3M Z350)分层固化充填,并随机分为A、B、C 3组,分别用弱光引导(A组)、间歇光照(B组)和高强度光照(C组)3种不同光照固化模式进行固化。标本充填完成后在37℃水浴条件下分别置于1 g/L罗丹明B荧光染料浸染,24 h后激光扫描共聚焦显微镜测量染液渗入深度,定量评价微渗漏程度,并对检测结果进行统计学分析。结果:A、B、C 3组微渗漏差异无统计学意义(P>0.05)。结论:弱光引导和间歇光照技术对复合树脂的边缘封闭性无明显影响。
AIM： To investigate the difference of microleakage between restoration and cavity under differ- ent light curing modes in vitro. METHODS： Cavities were prepared on the buccal surface of 30 extracted teeth. After cavity preparation, the teeth were randomly divided into three groups （A, B and C）. Group A, B and C were filled with composite resin （Z350） with low light, intermittent light and high light curing respectively. After filling, the teeth were bathed at 37~C in 1 g/L rhodamine solution for 24 h. Microleakage was evaluated with confocal laser scanning mi- croscopy. RESULTS ： No significant difference in microleakage was observed among the three groups （ P 〉 0.05 ）. CONCLUSION： Low light and intermittent Right curing modes showed no significant influence on the microleakage be- tween restoration and cavity.
出处
《牙体牙髓牙周病学杂志》
CAS
北大核心
2012年第8期449-452,共4页
Chinese Journal of Conservative Dentistry
关键词
光固化模式
微渗漏
激光扫描共聚焦显微镜
复合树脂
photoactivation mode
microleakage
confocal laser scanning microscopy
composite resins
