Soares Giulliana P, Silva Gustavo G, Ambrosano Glaucia M B, Lima Debora A N L, Marchi Giselle M, Lovadino José R, Aguiar Flávio H B
Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil.
J Investig Clin Dent. 2014 Nov;5(4):289-94. doi: 10.1111/jicd.12060. Epub 2013 Aug 15.
To quantify the microleakage on restorations carried out with a two-step etch-and-rise adhesive system and nanofilled composite resin after thermal and mechanical loading cycling.
Ninety cavities were prepared on proximal surfaces of incisive teeth, and were randomly divided according to the photoactivation time (10, 20, or 30 s) and light-curing mode (Quartz Tungsten Halogen (QTH) lamps, 450 mW/cm(2); Light Emitting Diode (LED) second generation, 1100 mW/cm(2); or LED third generation, 700 mW/cm(2)) of an adhesive system (n = 10). Following restorative procedures and thermal and mechanical loading cycling, the samples were immersed in Methylene Blue for 2 h. The samples were ground, and the powder was prepared for analysis in an absorbance spectrophotometer. All results were statistically analyzed by anova and Tukey's test at the 5% level of significance.
There were no significant statistical difference in microleakage between the light-curing mode (P = 0.1212) and light-curing time (P = 0.2043).
Different curing modes and increasing the curing time were not factors that influenced the process of microleakage.
量化在经过热循环和机械加载循环后，使用两步蚀刻-粘结型粘结系统和纳米填充复合树脂进行修复时的微渗漏情况。
在切牙近中面制备90个窝洞，根据粘结系统的光固化时间（10、20或30秒）和光固化模式（石英卤钨灯（QTH），450 mW/cm²；第二代发光二极管（LED），1100 mW/cm²；或第三代LED，700 mW/cm²）随机分组（n = 10）。经过修复程序以及热循环和机械加载循环后，将样本浸入亚甲蓝中2小时。将样本研磨，制备粉末用于在吸光分光光度计中进行分析。所有结果均通过方差分析和Tukey检验进行统计学分析，显著性水平为5%。
光固化模式（P = 0.1212）和光固化时间（P = 0.2043）之间在微渗漏方面无显著统计学差异。
不同的固化模式和增加固化时间并非影响微渗漏过程的因素。
