Method: Eighty subjects (18 to 23 years) were randomly divided into four groups: G1: hydrogen peroxide 6%, G2: hydrogen peroxide 6% + 0.5% Aloe vera; G3: hydrogen peroxide 6% + 1%Aloe vera, and G4: hydrogen peroxide 6% + 2% Aloe vera. The efficacy of the bleaching treatment was assessed by determining the change of color according to a color scale. Tooth sensitivity (classified as no pain, moderate pain or severe pain) and gingival irritation (presence or absence) were determined using a visual analogue scale by the patient. Data were submitted to ANOVA and Kruskal-Wallis tests.
Result: Although no statistically significant differences observed between the four groups for the variables tested.
Conclusion: It was concluded that the presence of Aloe vera reduced gingival inflammation and the greater the concentration of aloe vera in the bleaching gel, are less inflammatory cells were found. The Aloe vera did not affect the other variables tested, nor detracted from the action of the whitening gel.