A clinical study evaluating a new chairside and take-home whitening system

This study evaluated the efficacy of tooth color modifications with a 15% hydrogen peroxide in-office whitening system when applied for a 30-, 45-, or 60-minute period and combined with a 10% carbamide peroxide take-home system. Twenty-four patients participated in this randomized, parallel clinical evaluation. Six maxillary anterior teeth with a shade of A3 or darker were selected. Patients were randomly divided into 3 groups of 8: Group I patients received a 30-minute application, Group II received a 45-minute application, and Group III received a 60-minute application of the initial in-office treatment. All patients returned at 24 hours for shade evaluation and receipt of a whitening tray with a 10% carbamide peroxide for 7 consecutive days. Patients returned at 24 hours, 72 hours, and on the 8th day of take-home treatment for shade evaluation. Kruskal-Wallis ANOVA showed no statistically significant difference between the groups (P > .10) at completion of treatment. When all three groups were combined, a mean shade change > 8 was seen. No significant difference existed for tooth color modifications when varied application times of 30-, 45- or 60-minute in-office whitening with 15% hydrogen peroxide was used in combination with 10% carbamide peroxide take-home whitening.