Comparative assessment of bond strengths of affected dentin, using two different remineralizing solutions with or without lasers: Results of an in vitro pilot study

Abstract

Aims: Assessing remineralization and bond strengths of remineralizing agents with or without LASERS. Settings and Design: In vitro pilot study. Materials and Methods: Artificial caries-like lesion was created with 10% citric acid in 50 non carious extracted posterior teeth which were divided into six groups according to treatment: GC Tooth Mousse and Toothmin cream with or without LASER, positive and negative control. Remineralization was done for 5 min every day for 7 days. Microhardness test was repeated. Pulsed Nd:YAG Laser (1.064 cm wavelength) was used with a focused beam at 1W and 15 Hz for 10 s on exposed dentin surface. Samples were etched with etching gel for 15 s and rinsed with water for 30 s. Bonding composite restoration of 4 mm height was done with Mylar Strip. Tensile bond strength was calculated. Statistical Analysis: Student's paired t- test evaluated difference between mean values of microhardness. Student's unpaired t -test evaluated the difference between mean values of bond strengths between groups. Results: Significant difference in microhardness in HV (50 g load) was seen in all groups ( P P = 0.0021). Conclusions: Toothmin and GC Mousse with or without LASER were found to be effective in increasing mineralization. Bond strength of Toothmin with LASER treatment was higher compared to others.