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Comparison of Activated Bleaching Effects of Various Laser Systems: An In vitro Study

Ozgul Baygin*,Fatih Mehmet Korkmaz,Ipek Arslan

Aim: The aim of this in vitro study is to describe a preclinical investigation using laser-activated bleaching agent for discolored teeth.

Materials and methods: Sixty sound human central and lateral incisors were selected for this study and were randomly assigned into four groups as follows: Group 1 (n=15): only Whiteness HP 10 min; Group 2 (n=15): diode laser, wavelength 980 nm power 0.8 W–30 sec+Whiteness HP; Group 3 (n=15): diode laser, wavelength 980 nm power 1 W–30 sec+Whiteness HP; Group 4 (n=15): KTP laser wavelength 532 nm power 1 W–30 sec+Whiteness HP. In the bleaching experiment, 38% hydrogen peroxide was used. The results of the irradiations were characterized using the CIEL*a*b system.

Results: A mean total color difference value greater than 5.0 was obtained in each group. Lasers systems together with Whiteness HP bleaching gel showed the best results using only Whiteness HP gel (p<0.05). Conclusion: Application of laser systems with Whiteness HP provides simple, short, and powerful bleaching in dental offices.