Evaluation of the Efficacy and Color Stability of Two Different At-Home Bleaching Systems on Teeth of Different Shades: A Randomized Controlled Clinical Trial.
OBJECTIVE
This randomized controlled clinical trial compared the bleaching efficacy of two different at-home bleaching systems on teeth of different shades and their color stability after a 6-month follow-up.


METHODS
Ninety-two patients (777 teeth) were randomly divided into three groups: (a) negative control, (b) patients treated with a custom-made tray containing 10% carbamide peroxide (10% CP/PF) (Opalescence PF), and (c) patients treated with a pre-loaded tray containing 6% hydrogen peroxide (6% HP/Go) (Opalescence Go). Teeth in all groups were divided into three sub-groups according to the VITA Classic Shade Guide: light (A1-C1), medium dark (C2-B3), and dark (A3.5-C4). Bleaching systems were performed in accordance with manufacturers' instructions for 14 days. The color values were measured at the baseline, 10 days and 14 days of bleaching, 2 weeks, and 6 months after bleaching. Three-way ANOVA and Mann-Whitney U tests were used for statistical analysis (α = 0.05).


RESULTS
Irrespective of original shade, both bleaching groups showed significantly higher ΔE* values than the control groups, and the ΔE* values were significantly higher in the 10% CP/PF groups than those in the 6% HP/Go groups (p < 0.05). In both bleaching systems, the dark teeth showed higher ΔE* values than the light teeth (p < 0.05). The ΔE* values decreased significantly only in the 10% CP/PF groups after 6 months (p < 0.05).


CONCLUSIONS
Both bleaching agents produced a bleaching effect, but 10% CP/PF was more effective.


CONCLUSIONS
A pre-loaded tray system may be used for dental bleaching, but it is still less effective than conventional a 10% carbamide peroxide system, irrespective of the initial shade. (J Esthet Restor Dent 29:325-338, 2017).
Research Assistant, Department of Restorative Dentistry, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Türkiye.
Betül
B
Aka
Associate Professor, DDS, PhD, Department of Restorative Dentistry, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Türkiye.
Esra Uzer
http://orcid.org/0000-0002-2620-0436
EU
Celik
D000328:Adult; D000077463:Carbamide Peroxide / Q000737:chemistry*; D003742:Dental Devices, Home Care; D004955:Esthetics, Dental; D005260:Female; D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry*; D008297:Male; D008875:Middle Aged; D014073:Tooth Bleaching / Q000379:methods*; D058205:Tooth Bleaching Agents / Q000737:chemistry*; D014075:Tooth Discoloration / Q000517:prevention & control*; D016896:Treatment Outcome
D058205:Tooth Bleaching Agents; D000077463:Carbamide Peroxide; D006861:Hydrogen Peroxide