Comparison of two power bleaching technique

Materials and Methods: Eleven participants took part in this single-blind, clinical study. Each jaw was bleached with one of the products as manufacturer’s instructions. Color evaluated with digital photography before bleaching and 2 hour and 1 week after it by using ΔE index. Color change (ΔE) was calculated and hypersensitivity was assessed with questionnaire. Data were analyzed using paired t-test.

Results: ΔE before and 2 hour after bleaching for pola office was 7.1 5.7 and  was 5 2.3 for contrastam. ΔE before and 1 week after bleaching for pola office was 5.1 4.2 and was 3.7 1.5 for contrastam. Two hours after bleaching and 1 week after bleaching ΔE for pola office was 3.5 1.5 and was 3.7 1.5for contrastam. Three of participants showed no sensitivity and 8 person reported sensitivity just in the first day.

Conclusions:  Both studied products were considerably effective in tooth whitening, but there was no statistical difference between them in color change and hypersensitivity. Also both products showed remarkable color relapse which was not statistically different between two.