Beolchi Rafael Silva, Moura-Netto Cacio, Palo Renato Miotto, Rocha Gomes Torres Carlos, Pelissier Bruno
Restorative Dentistry, College of Dentistry, Universidade Estadual Paulista, São José dos Campos, SP, Brazil.
School of Dentistry, Universidade Cruzeiro do Sul, São Paulo, SP, Brazil.
Braz Oral Res. 2015;29. doi: 10.1590/1807-3107BOR-2015.vol29.0060.
The present study aimed to assess the influence of curing distance on the loss of irradiance and power density of four curing light devices. The behavior in terms of power density of four different dental curing devices was analyzed (Valo, Elipar 2, Radii-Cal, and Optilux-401) using three different distances of photopolymerization (0 mm, 4 mm, and 8 mm). All devices had their power density measured using a MARC simulator. Ten measurements were made per device at each distance. The total amount of energy delivered and the required curing time to achieve 16 J/cm(2) of energy was also calculated. Data were statistically analyzed with one-way analysis of variance and Tukey's tests (p < 0.05). The curing distance significantly interfered with the loss of power density for all curing light devices, with the farthest distance generating the lowest power density and consequently the longer time to achieve an energy density of 16 J/cm(2) (p < 0.01). Comparison of devices showed that Valo, in extra power mode, showed the best results at all distances, followed by Valo in high power mode, Valo in standard mode, Elipar 2, Radii-Cal, and Optilux-401 halogen lamp (p < 0.01). These findings indicate that all curing lights induced a significant loss of irradiance and total energy when the light was emitted farther from the probe. The Valo device in extra power mode showed the highest power density and the shortest time to achieve an energy density of 16 J/cm(2) at all curing distances.
本研究旨在评估固化距离对四种固化光设备的辐照度损失和功率密度的影响。使用三种不同的光聚合距离（0毫米、4毫米和8毫米）分析了四种不同牙科固化设备（Valo、Elipar 2、Radii-Cal和Optilux-401）在功率密度方面的表现。所有设备均使用MARC模拟器测量其功率密度。在每个距离下，对每个设备进行十次测量。还计算了传递的总能量以及达到16 J/cm²能量所需的固化时间。数据采用单因素方差分析和Tukey检验进行统计学分析（p < 0.05）。固化距离对所有固化光设备的功率密度损失有显著影响，距离最远时功率密度最低，因此达到16 J/cm²能量密度所需的时间更长（p < 0.01）。设备比较显示，在所有距离下，处于额外功率模式的Valo表现最佳，其次是处于高功率模式的Valo、标准模式的Valo、Elipar 2、Radii-Cal和Optilux-401卤素灯（p < 0.01）。这些发现表明，当光线从探头发射得更远时，所有固化光都会导致显著的辐照度损失和总能量损失。在所有固化距离下，处于额外功率模式的Valo设备具有最高的功率密度和达到16 J/cm²能量密度所需的最短时间。
