A total of 74 patients were examined to assess whether they met the criteria for inclusion and exclusion. Patients: over 18 years, with one or more non-vital teeth, the restoration does not cover the vestibular face, endodontic treatment is in good condition, without apical lesion, with no previous experience of tooth whitening and tooth shade A2 or greater according to the Vita Classical scale. Patients were excluded pregnant or lactating, patients with enamel hypoplasia, with teeth stained by tetracycline or fluorosis, in orthodontic treatment with fixed appliances, patients with cancer or periodontal diseases. In addition to those volunteers to be examined clinically and radiographically present caries, periapical lesions, external or internal dental resorption and / or periodontal disease, as may be informed and referred to specialists for treatment.