Tooth Color Retention Profile With Use of Whitening Strips + Light

Objectives: This clinical trial evaluated post-treatment color retention after use of whitening strips with light system over a one year period.
Methods: After institutional review and informed consent, 39 adults with no history of previous bleaching and a Vita shade of A2 or darker on maxillary anterior teeth used Crest^® 3D White Luxe Supreme FlexFit Whitestrips^® with Light for a total of 60 minutes once a day for 10 days. During the last 5 minutes of each wear, subjects applied the light device to their anterior teeth. Efficacy was measured objectively as L*a*b* color change using digital images and safety was evaluated by examination and subject interview. Measurements were taken at Baseline and Day 11 (end of treatment) and then at 4, 8, 12, 24, and 52 weeks post-treatment.
Results: Thirty-one subjects completed the study. Mean (SD) age was 41.6 (12.3). At the end of treatment, subjects exhibited a significant mean yellowness improvement (△b*) of -2.64 (p<0.001) from baseline as well as significant overall color change (△E2000) of 2.31 (p<0.001). After 52 Weeks, subjects continued to exhibit significant (p<0.001) improvement with △b* = -2.34 and △E2000=1.68 relative to baseline.
Conclusions: Crest^® 3D White Luxe Supreme FlexFit Whitestrips^® with Light deliver a significant and prolonged whitening efficacy.