1963 Clinical Evaluation of an In-Office Tooth Whitening System
D. BARDWELL, A. PAPATHANASIOU, and P. GEORGI, Tufts University School of Dental Medicine, Boston, MA, USA
Objectives: The purpose of this study was to evaluate the efficacy of a 15% hydrogen peroxide in-office tooth whitening system (Illumine¢ Whitening System, Dentsply Professional) in a stand alone technique.
Methods: Twenty (20) patients with no compromised medical history or tooth sensitivity participated in this randomized, parallel clinical evaluation. Only six maxillary anterior teeth with minor uniform intrinsic staining or discoloration with a shade no lighter than A-3 were selected. The six mandibular anterior teeth were used as the control group. After receiving a prophylaxis, each patient was evaluated for initial (baseline) shade by three evaluators, pre-calibrated at 85% rate reliability before the onset of this project. Shades were assessed using the Standard Vita Shade Guide arranged in value order. Alginate impressions were taken for fabrication of upper custom bleaching trays. Each patient received a 30 minutes initial in-office treatment utilizing the custom tray to deliver the 15% hydrogen peroxide material (Illumine¢ Whitening System, Dentsply). Patients returned at 24 and 72 hours for shade evaluation and additional applications. Patients were requested to return after 7 days and at 6 months after the final bleaching application for shade evaluation. Results: The results of this study revealed an average of 8.4±1.6 shade change. Shade changes were determined from the number of shades on the Vita Shade Guide when arranged in Value Order. One Way Anova revealed significant difference between pre-treatment and posttreatment recalls (p<.01). T-test revealed no significant difference between 7 day and 6mo. recall.
Conclusions: In conclusion, the results of this study reveal significant shade lightening after 3 consecutive applications of this 15% hydrogen peroxide. Furthermore, no significant difference in shade change(rebound) was observed from 7day through 6 mo. recall. Seq #185 - Clinical Evaluations of Tooth Bleaching and Sensitivity 11:00 AM-12:15 PM, Friday, 8 March 2002 San Diego Convention Center Exhibit Hall C