Okte Zepnep, Villalta Patricia, Garcia-Godoy Franklin, Garcia-Godoy Franklin, Murray Peter
Department of Pediatric Dentistry, Faculty of Dentistry, University of Ankara, Ankara, Turkey.
Oper Dent. 2005 Jul-Aug;30(4):540-5.
This study compared the Vickers hardness of the top and bottom surfaces of two compomers (Compoglass F and Dyract AP) polymerized for 20 and 40 seconds with two different light curing systems. Five samples for each group were prepared using Teflon molds (9x2 mm) and were light-cured either with a conventional halogen lamp (Optilux 501) or LED light (LEDemetron I) for 20 or 40 seconds. After curing, all the samples were stored in distilled water for 24 hours at 37 degrees C. The Vickers hardness measurements were obtained from the top and bottom surfaces of each sample. ANOVA, Scheffé and t-test were used to evaluate the statistical significance of the results. For the top and bottom surfaces, the light curing systems and curing times tested showed no statistical difference, except for Optilux 501, which used 20 seconds for both compomers (p<0.05). There was no significant difference in the microhardness of both surfaces of Compoglass F and Dyract AP cured for either 20 or 40 seconds using LEDemetron I. With Optilux 501, the microhardness of samples cured for 40 seconds was significantly higher than 20 seconds (p<0.05).
本研究比较了两种复合体（Compoglass F和Dyract AP）在两种不同光固化系统下分别聚合20秒和40秒后顶面和底面的维氏硬度。使用特氟龙模具（9×2毫米）为每组制备五个样本，并用传统卤素灯（Optilux 501）或LED灯（LEDemetron I）进行20秒或40秒的光固化。固化后，所有样本在37摄氏度的蒸馏水中储存24小时。从每个样本的顶面和底面获得维氏硬度测量值。使用方差分析、谢费检验和t检验来评估结果的统计学意义。对于顶面和底面，除了Optilux 501对两种复合体均使用20秒固化时间的情况外（p<0.05），所测试的光固化系统和固化时间均未显示出统计学差异。使用LEDemetron I对Compoglass F和Dyract AP进行20秒或40秒固化后，两者表面的显微硬度没有显著差异。使用Optilux 501时，固化40秒的样本显微硬度显著高于固化20秒的样本（p<0.05）。
