Objective: To evaluate the effect of Gumgumix herbal toothpaste on remineralization of white spot lesions with a laser fluorescent system called FluoreCam. It is a pilot study. Methods:The FluoreCam system was used for the fluorescence imaging of the fifteen teeth with white spot lesions. During the study, the patients continued to use the previously owned toothpastes, addition to Gumgumix. Gumgumix was applied on the lesion area with a finger pressure twice a day and was not rinsed mouth after, only a limited spit and was prevented from taking any fluid during 30 minutes. The "Compare" option in the FluoreCam system was used to differentiate the situation before and after the use of the paste; if the marked area were yellow "No Change"; blue "Sound Surface"; green "Improving"; light blue "Mild Improving" and red meant "Worsening".Results: Of the 13 lesions that were "Suspect Surface" initially, 46% were identified as "Mild Improving", 7% as "Moderate Worsening", 30% as "No Change", and 15% as "Sound Surface". Two of the white spot lesions were recovered totally as 100%. Conclusion:After use of Gumgumix for one week, remineralization was observed on teeth with white spot lesion. The white spot lesions on two teeth were totally healed.

Background/Aim: The aim of this study was to examine the microleakage values after restoring the prepared Class II box cavities using two different composite resins with three different layering methods and polymerizing them with five different LED light devices. Material and Methods: Class II box cavities were prepared in 150 extracted mandibular molars. Nanoceramic composite resin (Ceram.x SphereTEC one universal A2, Dentsply, Germany) and bulk fill composite resin (SDR flow+ A2, Dentsply, Germany) were used for the restoration of the cavities. Teeth were restored with three different layering methods (bulk fill, horizontal layering, and centripetal buildup technique) and five different LED light devices [(Smartlite Focus, Dentsply, USA), (Led.E, Woodpecker, China), (Valo Cordless, Ultradent, USA), (Bluephase N, Ivoclar Vivadent, Liechtenstein), (D-Light Pro (GC, USA)] and then subjected to microleakage analysis. Kruskal Wallis and Mann Whitney U test were used for statistical analysis. Th e data was evaluated under p<0.005 significant level. Results: Using different layering methods did not affect microleakage scores statistically (p=0.7683). Applying bulk-fill composite resin with 2 mm horizontal layers or using the centripetal buildup technique did not show significant differences in microleakage. Second- and third-generation light devices demonstrated no statistical difference in microleakage (p=0.9075). Conclusions: Using different layering methods and different curing units did not make any difference in microleakage.