 128 patients between 18 and 76 years who attended the Operative Dentistry Clinic at Dental School, Universidad de Chile, were included in the study. 58 patients were bleaching experimental group and 70 patients dont accepted the bleaching procedure control group were included in this study and signed a consent form.Experimental group Patients who agreed to be bleaching were treated with 10 carbamide peroxide CP gel Whiteness Perfect, FGM to each subject With verbal instructions for 3 weeks with daily applications of 1 hour according to manufacturers indications , before and after this procedure was applied again the NEO-FFI personality test form, had 30 minutes to answer it.Control group:Patients who refused to be bleached were administered the personality test NEO-FFI, had 30 minutes to answer it. 