Clinical Trial Assessing Light Enhancement of In-office Tooth Whitening

ABSTRACT Objective: Evaluate a light‐enhanced in‐office tooth whitening system in order to assess tooth color and safety. Methods: Thirty‐three adults were randomly assigned to one of three treatment groups. Professional treatment involved application of a 25% H2O2 gel (Discus Dental ZOOM!) with light enhancement, H2O2 gel alone, or the light alone with no peroxide. The 12 anterior teeth were treated three times for 20 minutes each. Efficacy was measured objectively as L*a*b* color change using digital images, tooth shade was measured, and safety was evaluated immediately after treatment and at posttreatment days 7 and 30. Results: After adjusting for baseline and age, immediate (end‐of‐treatment) means (SE) for Δb* (yellowness) were –3.1 (0.25) for the gel + light, –2.0 (0.25) for the gel‐only group, and –2.4 (0.25) for the light‐only group. Significant (p