Whitening Efficacy and Tooth Sensitivity of Different Concentrations of Hydrogen Peroxide Photoactivated With Violet or Blue LEDs

Clinical Comparison of Whitening Efficacy and Tooth Sensitivity of Different Concentrations of Hydrogen Peroxide Photoactivated With Violet or Blue LEDs

This is a randomized, controlled, double-blind and repeated-measures clinical trial evaluated the photoactivation of hydrogen peroxide gels in different concentrations with blue or violet LED in terms of whitening efficacy and tooth sensitivity.

Inclusion Criteria:

• at age 18 or older, with good general and oral health;
• possessing all six natural and healthy upper anterior teeth with a color shade of A2 or darker, determined by comparison with the Vita Classic scale;

Exclusion Criteria:

• pregnant and breastfeeding women;
• individuals with internal tooth discoloration (tetracycline stains, fluorosis or hypoplasias);
• smokers, or those with veneers or restorations on the teeth in questions were excluded;
• gingival recession;
• dentin exposure;
• periodontal disease.