Comparative Clinical Study of Two Tooth Whitening Protocols. A Randomized Clinical Trial. Part 2.

ABSTRACT

This study aimed to clinically evaluate the efficacy of two different home whitening protocols and to determine which is more effective applying the whitening gel every 48 hours or every 72 hours for 6 weeks. The differences in terms of tooth sensitivity are also analyzed. A sample of 72 patients was randomly divided into 3 groups of 24 (N=24). Group A 16% carbamide peroxide applied every 48h for 6 weeks. Group B 16% carbamide peroxide applied every 72h for 6 weeks. Group C (control group) a placebo gel without peroxide (glycerin gel) was applied every 48h for 6 weeks. To compare the groups, color measurements were made using a spectrophotometer and ANOVA test and Bonferroni test was used. The confidence level was set at 95% (p ≤ 0.05) and no statistically significant differences between applying 16% carbamide peroxide every 48h or every 72h for 6 weeks (p> 0.05) were found. The study concluded that carbamide peroxide 16% is equally effective applied with both protocols, obtaining the same results.