A survey of the effectiveness of dental light-curing units and a comparison of light testing devices
A survey of the effectiveness of dental light-curing units and a comparison of light testing devices
复制标题
牙科光固化装置的有效性调查和光测试设备的比较
作者：
S. Dunne;B. Davies;B. Millar
本研究的目的是：1。对临床使用的49台光固化机的光输出量进行调查; 2.测量由一定范围的光输出引起的对复合树脂固化深度的影响; 3.评估辐射计读数与人牙模型和Heliotest中复合树脂固化深度之间的关系。使用灯下辐射计测量的49盏灯产生的平均仪表阅读为4.4（+/-2.4 SD），范围为0.3至10.0。辐射计的制造商考虑最佳光输出以提供在5.0至7.0范围内的仪表阅读。发现非常低输出（0.7 +/-0.1 SD）的光能够在20秒后固化1.9（+/-0.3 SD）mm厚的复合树脂。然而，仅该厚度的约50%可以被认为是完全固化的。将固化时间从20秒增加到60秒，平均固化深度增加了约1.4倍。放置在Heliotest中的复合树脂的平均固化深度大于在天然牙齿模型中观察到的平均固化深度，约为1.3倍。Efos Cure Rite和Demetron 100辐射计的仪表读数和固化深度的相关系数大于灯泡装置
The aims of this study were to: 1. survey the light output from 49 light-curing units in clinical use; 2. measure the effect on depth of cure of composite resin caused by a range of light outputs; 3. assess the relationship between radiometer meter readings and depth of cure of composite resin in a human tooth model and a Heliotest. The mean meter reading produced by the 49 lights surveyed using a lampChecker radiometer was 4.4 (+/−2.4 SD), range 0.3 to 10.0. The manufacturer of the radiometer considers optimal light output to provide a meter reading within the range 5.0 to 7.0. Lights of very low output (0.7 +/− 0.1 SD) were found to be capable of curing, after 20 seconds, a 1.9 (+/−0.3 SD) mm thickness of composite resin. However, only approximately 50% of this thickness can be considered fully cured. Increasing the cure time from 20 seconds to 60 seconds increased the mean depths of cure by a factor of approximately 1.4. The mean depths of cure of composite resin placed in the Heliotest were greater than those observed in the natural tooth model, by a factor of approximately 1.3. Correlation coefficients of meter readings and depth of cure were greater for the Efos Cure Rite and Demetron 100 radiometers than the lampChecker unit