The comparison between bleaching gels of FGM & BOOST along with laser on superficial micro hardness: In vitro study

Nowadays, usage of laser in vital tooth bleaching is increasing in order to faster achievement to final results. This study aims to compare the effect of FGM æ Opalescence® bleaching gels on enamel micro hardness using diode laser 810nm (1.5W).
Material and In this experimental study, twenty human premolars were then randomly assigned to two bleaching groups. Group one: Opalescence® Boos (HP 40%) using diode laser 810 nm, Group two: FGM (HP 35%) using diode laser 810 nm. The gel received three repetitive activation cycles (each cycle: 30 seconds laser switched on followed by 1 minute rest interval). Vickers micro hardness (VH) was evaluated at baseline and after the bleaching process. Variation of micro hardness in two groups was evaluated with Man-U-Whitney test.
The variation of micro hardness of FGM and Boost group were -32±26 and 3±31 respectively.(p Laser bleaching with Diode 810 nm using FGM gel can cause more significant decrease in enamel micro hardness compared to bleaching technique with Opalescence® Boost and Diode 810 nm.