Soh M S, Yap Adrian U J, Yu T, Shen Z X
Department of Restorative Dentistry, Faculty of Dentistry, National University of Singapore, Republic of Singapore.
Oper Dent. 2004 Sep-Oct;29(5):571-7.
This study determined the degree of conversion of two LED (light-emitting diodes) (Elipar FreeLight [FL], 3M ESPE; GC e-Light [EL], GC), a high intensity (Elipar TriLight [TL], 3M ESPE) and a very high intensity (Astralis 10 [AS], Ivoclar Vivadent) halogen light. The degree of conversion of these lights was compared to a conventional halogen light (Max [MX] (control), Dentsply-Caulk). Ten different light curing regimens, including pulse (EL1), continuous (FL1, EL2, TL1), turbo (EL3, AS1) and soft-start (FL2, EL4, TL2) modes of various lights were also investigated. Composite specimens of dimensions 3 x 3 x 2 mm were cured with the 10 different light curing regimens investigated. Micro-Raman spectroscopy was used to determine the degree of conversion at the top and bottom surfaces of a composite restorative (Z100, [3M ESPE]) at 60 minutes post-light polymerization. Five specimens were made for each cure mode. The results were analyzed using ANOVA/Scheffe's post-hoc test and Independent Samples t-tests at significance level 0.05. The degree of conversion ranged from 55.98 +/- 2.50 to 59.00 +/- 2.76% for the top surface and 51.90 +/- 3.36 to 57.28 +/- 1.56% for the bottom surface. No significant difference in degree of conversion was observed for the 10 light curing regimens when compared to MX (control). The curing efficiency of LED lights was comparable to halogen lights regardless of curing modes.
本研究测定了两种发光二极管（LED）（3M ESPE公司的Elipar FreeLight [FL]和GC公司的GC e-Light [EL]）、一种高强度（3M ESPE公司的Elipar TriLight [TL]）和一种超高强度（义获嘉伟瓦登特公司的Astralis 10 [AS]）卤素灯的固化转化率。将这些灯的固化转化率与传统卤素灯（登士柏-卡克公司的Max [MX]（对照））进行比较。还研究了10种不同的光固化方案，包括各种灯的脉冲（EL1）、连续（FL1、EL2、TL1）、涡轮（EL3、AS1）和软启动（FL2、EL4、TL2）模式。用所研究的10种不同光固化方案对尺寸为3×3×2 mm的复合树脂试样进行固化。采用显微拉曼光谱法测定光聚合60分钟后复合树脂修复体（3M ESPE公司的Z100）顶面和底面的固化转化率。每种固化模式制作5个试样。结果采用方差分析/谢费尔事后检验和独立样本t检验进行分析，显著性水平为0.05。顶面的固化转化率范围为55.98±2.50%至59.00±2.76%，底面为51.90±3.36%至57.28±1.56%。与MX（对照）相比，10种光固化方案的固化转化率未观察到显著差异。无论固化模式如何，LED灯的固化效率与卤素灯相当。
