Be excluded from the study patients: they have already made treatment tooth whitening, or dental prosthesis having options at the upper front teeth , who are pregnant or lactating , presenting gingival recession, sensitivity dental, endodontic treatment in anterior maxillary teeth, which have a coloring severe internal, if they have non-carious cervical lesions, are taking medications , using fixed orthodontic appliances, submit bruxism habits, which have visible teeth cranks and those who are not available to attend the controls.