Abstract：
This study aimed to evaluate the influence of the Er,Cr:YSGG irradiation and 980-nm diode lasers on the surface roughness (SR) and volume loss (VL) of dentin subjected to cariogenic challenge. Subsequently, 130 specimens of bovine dentin were divided into the following 13 groups: NT: no treatment; FG: fluoride gel; FV: fluoride varnish; Di: 980-nm diode; Di + FG; Di + FV; FG + D; FV + Di; Er: Er,Cr:YSGG; Er + FG; Er + FV; FG + Er and FV + Er. Er,Cr:YSGG laser parameters were as follows: 0.25 W; 5.0 Hz; 4.46 J/cm2 without water and 55% air. Furthermore, the 980-nm diode laser parameters were 2.0 W; 2.0 Hz; 21.41 J/cm2. The samples from each group were subjected to pH cycling. A confocal laser scanning microscope was used to evaluate SR and VL. Difference between the volume of the reference and treated areas + DES/RE was used to determine SR and VL. The mean values of the different groups were subjected to analysis of variance and Tukey\'s post-hoc test. The VL values were analyzed using the Kruskal-Wallis and Dunn post-hoc test (p < 0.05). The SR of the reference area did not show a statistically significant 1807-3107-bor-38-e025treatment and cariogenic challenge (p > 0.05). Moreover, VL in the FV + Di and FV + Er groups showed a statistically significant difference compared with areas submitted to different types of treatment and cariogenic challenge (p > 0.05). Er,Cr:YSGG and 980-nm diode lasers associated with fluoride varnishes decreased dentin VL in bovine teeth submitted to cariogenic challenge.
摘要：
本研究旨在评估Er的影响，Cr：YSGG辐照和980nm二极管激光器对经受龋齿挑战的牙本质的表面粗糙度（SR）和体积损失（VL）。随后，130例牛牙本质标本分为以下13组：NT：未处理；FG：氟化物凝胶；FV：氟化物清漆；Di：980nm二极管；DiFG；DiFV；FGD；FVDi；Er：Er，Cr:YSGG;Er+FG;Er+FV;FG+Er和FV+Er。呃，Cr:YSGG激光参数如下:0.25W;5.0Hz;4.46J/cm2,没有水和55%空气。此外，980nm二极管激光器参数为2.0W;2.0Hz;21.41J/cm2。对来自每组的样品进行pH循环。使用共聚焦激光扫描显微镜来评估SR和VL。参考区域和处理区域的体积之间的差异+DES/RE用于确定SR和VL。对不同组的平均值进行方差分析和Tukey的事后检验。使用Kruskal-Wallis和Dunn事后检验分析VL值(p<0.05)。参考区域的SR未显示统计学上显著的1807-3107-bor-38-e025处理和致龋攻击(p>0.05)。此外，FVDi和FVEr组中的VL与接受不同类型的治疗和致龋攻击的区域相比显示出统计学上的显着差异（p>0.05）。呃，Cr：与氟化物清漆相关的YSGG和980nm二极管激光器降低了遭受致龋挑战的牛齿中的牙本质VL。
