Peroxide Level in Saliva During Teeth Bleaching Using a Tray With Reservoir Versus a Tray Without Reservoir.

The aim of the study is to clinically assess the peroxide levels in saliva during bleaching with 9.5% hydrogen peroxide using a tray with or without reservoir.

Inclusion Criteria:Good general health.Absence of non-carious cervical lesions, active caries, gingival recession, or periodontal disease.Do not use orthodontics appliance or removable prosthesis.Maxillary anterior teeth without caries, restorations and/or endodontic treatment.Mild generalized staining.Exclusion Criteria:Smoking or alcohol dependent patients.Pregnancy and lactating women.Parafunctional habits or pathologies.Periapical alterations.Use of medicaments that alter salivary flow.Patients who had already undergone tooth bleachingPatients with severe internal tooth discoloration as tetracycline stain, fluorosis or endodontic treatment.Tooth hypersensitivity.Presence of cracks or fractures.Periodontal affection sign and symptoms.