Evaluation of the Effect of Fluoride and Laser Application on the Prevention of Sensitivity in Bleached Teeth

Effect of Sodium Fluoride at 1.1%, Associated or Not With the Low-level Light Therapy in the Prevention of Post-bleaching Sensitivity: a Randomized, Double-blind, Controlled Trial

To investigate the effects of desensitizing agents on the dental bleaching process, testing the hypothesis that they may prevent dental sensitivity.

The objective of this double blind, randomized and controlled clinical study, was to evaluate the efficacy of 1.1% sodium fluoride associated with LLLT (Low Level Laser Therapy) on teeth that were exposed to 35% hydrogen peroxide during 4 weeks of bleaching treatment. Methods: 25 volunteers were evaluated through the split-mouth model, where the hemiarcates were ranzomized and later allocated in one of the experimental groups: G-FLUOR+LASER - constitutes the group treated with LLLT + 1.1% sodium fluoride; and G-FLUOR - constitutes the group treated with placebo + 1.1% sodium fluoride .

Inclusion Criteria:

• Absence of active carious lesions;
• Good oral hygiene;
• Do not present hypersensitivity;
• Do not smoke;
• Not being pregnant.

Exclusion Criteria:

• Presence of periodontal disease;
• Presence of cracks or fractures;
• Presence of restorations and prostheses;
• Presence of gastroesophageal dysfunction;
• Patients with severe internal dental dimming.