光固化机热发射的特性描述

Characterization of heat emission of light-curing units.

作者信息

Wahbi Mohammed A, Aalam F A, Fatiny F I, Radwan S A, Eshan I Y, Al-Samadani K H

机构信息

Conservative Dentistry, Makkah Dental Centre, P.O. Box 3381, Makkah, Saudi Arabia.

出版信息

Saudi Dent J. 2012 Apr;24(2):91-8. doi: 10.1016/j.sdentj.2012.01.003. Epub 2012 Mar 9.

DOI:10.1016/j.sdentj.2012.01.003

PMID:23960535

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3723364/

Abstract

OBJECTIVES

This study was designed to analyze the heat emissions produced by light-curing units (LCUs) of different intensities during their operation. The null hypothesis was that the tested LCUs would show no differences in their temperature rises.

METHODS

FIVE COMMERCIALLY AVAILABLE LCUS WERE TESTED: a "Flipo" plasma arc, "Cromalux 100" quartz-tungsten-halogen, "L.E. Demetron 1" second-generation light-emitting diode (LED), and "Blue Phase C5" and "UltraLume 5" third-generation LED LCUs. The intensity of each LCU was measured with two radiometers. The temperature rise due to illumination was registered with a type-K thermocouple, which was connected to a computer-based data acquisition system. Temperature changes were recorded in continues 10 and 20 s intervals up to 300 s.

RESULTS

The Flipo (ARC) light source revealed the highest mean heat emission while the L.E. Demetron 1 LED showing the lowest mean value at 10 and 20 s exposure times. Moreover, Cromalux (QTH) recorded the second highest value for all intervals (12.71, 14.63, 14.60) of heat emission than Blue Phase C5 (LED) (12.25, 13.87, 13.69), interestingly at 20 s illumination for all intervals the highest results (18.15, 19.27, 20.31) were also recorded with Flipo (PAC) LCU, and the lowest (6.71, 5.97, 5.55) with L.E. Demetron 1 LED, while Blue Phase C5 (LED) recorded the second highest value at the 1st and 2nd 20 s intervals (14.12, 11.84, 10.18) of heat emission than Cromalux (QTH) (12.26, 11.43, 10.26). The speed of temperature or heat rise during the 10 and 20 s depends on light intensity of emitted light. However, the QTH LCU was investigated resulted in a higher temperature rise than LED curing units of the same power density.

CONCLUSION

The PAC curing unit induced a significantly higher heat emission and temperature increase in all periods, and data were statistically different than the other tested groups (p < .05). LED (Blue Phase C5) was not statistically significant (p < .05) (at 10 s) than QTH units, also LED (Blue Phase C5, UltraLume 5) generates obvious heat emission and temperature rises than QTH units (at 20 s) except for those which have lower power density of LED curing units (first generation). Thus, the null hypothesis was rejected.

摘要

目的

本研究旨在分析不同强度的光固化机（LCU）在运行过程中产生的热排放。无效假设是所测试的光固化机在温度升高方面无差异。

方法

测试了五款市售光固化机：“Flipo”等离子弧光固化机、“Cromalux 100”石英钨卤光固化机、“L.E. Demetron 1”第二代发光二极管（LED）光固化机以及“Blue Phase C5”和“UltraLume 5”第三代LED光固化机。使用两个辐射计测量每台光固化机的强度。通过连接到基于计算机的数据采集系统的K型热电偶记录光照引起的温度升高。以连续10秒和20秒的间隔记录温度变化，直至300秒。

结果

Flipo（弧光）光源显示出最高的平均热排放，而L.E. Demetron 1 LED在10秒和20秒的曝光时间显示出最低的平均值。此外，在所有间隔（12.71、14.63、14.60）中，Cromalux（石英钨卤）记录的热排放值仅次于Blue Phase C5（LED）（12.25、13.87、13.69），有趣的是，在所有间隔的20秒光照下，Flipo（等离子弧）光固化机也记录了最高结果（18.15、19.27、20.31），而L.E. Demetron 1 LED记录了最低结果（6.71、5.97、5.55），同时在热排放的第1个和第2个20秒间隔（14.12、11.84、10.18）中，Blue Phase C5（LED）记录的值仅次于Cromalux（石英钨卤）（12.26、11.43、10.26）。在10秒和20秒内温度或热升高的速度取决于发射光的光强度。然而，所研究的石英钨卤光固化机比相同功率密度的LED固化机导致更高的温度升高。

结论

等离子弧固化机在所有时间段均导致显著更高的热排放和温度升高，数据与其他测试组在统计学上存在差异（p < 0.05）。LED（Blue Phase C5）与石英钨卤光固化机相比在统计学上无显著差异（p < 0.05）（在10秒时），除了那些功率密度较低的第一代LED固化机外，LED（Blue Phase C5、UltraLume 5）在20秒时也比石英钨卤光固化机产生明显的热排放和温度升高。因此，无效假设被拒绝。