In-Office Whitening Clinical Evaluation Comparing Two H202 Concentrations Used with a Light-Assisted Chairside Tooth Whitening System in vivo study Ward M1, Felix H2, Clinical Evaluation Comparing two H202 Concentrations Used with a Light-Assisted Chairside Tooth Whitening Systems. Compendium 33(4): 286-291, 2012. Private Practice, Houston, TX, USA, 2Discus Dental, Inc., Culver City, CA, USA Objective: To assess the efficacy of two concentrations of hydrogen peroxide (H202) gels in a split-arch protocol in a clinical setting when used in conjunction with the BriteSmile BS4000 light. Materials: • 15% hydrogen peroxide whitening gel • 25% hydrogen peroxide whitening gel (Philips Discus Dental, Inc., Culver City, CA, USA) • Chairside whitening lamp (BriteSmile BS4000, Philips Discus Dental, Inc., Culver City, CA, USA) Methodology: Fifteen healthy adults over age 18 with a tooth shade greater than or equal to A3 (Vita Shade guide, Vita Zahnfabrick GMbH, Sackingen, Germany) for all six nonrestored maxillary anterior teeth were enrolled in a single-center trial. Tooth shade was assessed before whitening treatment, immediately after whitening treatment (same day), and one week after treatment. All study subjects were treated with three 20-minute exposures of the BriteSmile BS4000 lamp with 15% H202 on three of the teeth and 25% H202 on the other three teeth. The gel was removed and reapplied between light exposures. Total exposure time was 60 minutes. Subjects were treated with ACP gel at the conclusion of treatment. Results: Both groups had significant lightening immediately after treatment. Changes in tooth shade were better for the teeth treated with 25% H2O2 (average of 8.0 shade changes) than the teeth treated with 15% H2O2 (average of 7.6 shade changes). The same held true one week post treatment (7.4 shade changes with 25% H2O2 versus 7.3 shade changes with 15% H2O2). However, the difference in shade change was not statistically significant immediately or at one week post treatment. There was no significant difference in tooth sensitivity scores between the two groups. In-Office Whitening Clinical Evaluation Comparing Two H202 Concentrations Used with a Light-Assisted Chairside Tooth Whitening System

Light-Activated System for Bleaching Teeth Mean Shade Guide Unit Measurement In-Office Whitening Before Treatment Post Treatment Post Treatment 1 week Conclusion: In-office treatment using a chairside whitening lamp and either 25% H2O2 or 15% H2O2 is a safe and effective method for whitening teeth within one hour. In-Office Whitening