A clinical study of the effectiveness of two different 10% carbamide peroxide bleaching products: a 6-month followup
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Date
2011Author
Grobler, Sias Renier
Majeed, Abdul
Hayward, Roche
Rossouw, Roelof
Moola, Mohamad H.
van Wyk Kotze, Theuns
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The purpose of this study was to evaluate the efficacy of two different 10% carbamide peroxide bleaching products just after
treatment and after a 6-month follow-up period. Methods. Two 10% carbamide peroxide products (Opalescence PF andNiteWhite
ACP) were applied nightly for 14 days, according to the manufacturers’ instructions. The color of teeth 11 and 21 of thirty-four
subjects having A2 or darker teeth were measured with a spectrophotometer (L∗; a∗; b∗) before treatment, just after treatment (14
days) and after 6 months. Results and Conclusions. Both products produced significant whitening of teeth with total color change
(ΔE∗
ab) of approximately 5.20 units. There was a significant improvement in all 3 color coordinates (L∗, a∗, and b∗) for up to 6
months postbleaching (P < .05). Nite White showed a higher degree of relapse (27%) than Opalescence (18%) over the 6-month
period. It is suggested that rebleaching after 6 months is not necessary