Ajaj Reem A, Nassar Hani M, Hasanain Fatin A
Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.
J Int Soc Prev Community Dent. 2018 Nov-Dec;8(6):523-528. doi: 10.4103/jispcd.JISPCD_226_18. Epub 2018 Nov 29.
The objective of the study is to investigate the effect of infection control barrier (ICB) and curing time on irradiance of light cure units (LCUs).
Irradiance (mW/cm) of the LCUs at a government dental school were recorded with and without ICB at 0 (T), 10 (T), and 20 (T) seconds using a digital radiometer. Data were analyzed using IBM SPSS Statistics Version 17 for Windows software for the analysis of variance and Bonferroni methods at 0.05 significance level.
Using ICB resulted in a statistically significant effect on the irradiance mean ( < 0.01). A significant difference existed between the four different brands of LCUs at different time intervals, irrespective of the use of ICB. At T and T, the mean output of Acteon mini-light-emitting diode (LED) was significantly higher than that of either the Kerr Demi Ultra or the Kavo Polylux II. At T, E-Morlit's mean irradiance was significantly higher than that of Kerr Demi Ultra, which in turn was significantly higher than that of the Kavo PolyLux II. The mean irradiance of the LEDs was significantly higher than that of the halogens irrespective of barrier placement and at all-time points.
The ICB used in this study resulted in a statistically significant reduction in the irradiance output. No significant difference in the irradiance was found at different curing time intervals for the tested units regardless of ICB usage.
本研究的目的是调查感染控制屏障（ICB）和固化时间对光固化灯（LCU）辐照度的影响。
使用数字辐射计，在有和没有ICB的情况下，于0（T0）、10（T10）和20（T20）秒记录一所政府牙科学校LCU的辐照度（mW/cm²）。使用IBM SPSS Statistics Version 17 for Windows软件进行数据分析，采用方差分析和Bonferroni方法，显著性水平为0.05。
使用ICB对辐照度平均值有统计学显著影响（P<0.01）。无论是否使用ICB，在不同时间间隔下，四种不同品牌的LCU之间存在显著差异。在T0和T10时，Acteon迷你发光二极管（LED）的平均输出显著高于Kerr Demi Ultra或Kavo Polylux II。在T20时，E-Morlit的平均辐照度显著高于Kerr Demi Ultra，而Kerr Demi Ultra又显著高于Kavo PolyLux II。无论屏障放置情况如何以及在所有时间点，LED的平均辐照度均显著高于卤素灯。
本研究中使用的ICB导致辐照度输出在统计学上显著降低。无论是否使用ICB，对于测试的设备，在不同固化时间间隔下未发现辐照度有显著差异。
