The patients initially will complete a pre-surgical therapy - a program of plaque control was performed before and after surgery and scaling and root planning with curettes. The plaque and bleeding indices should be less than 20% at baseline. All risks and benefits involved in the surgical procedures will be explained to the patients before they signed a consent form in agreement. The methodology was approved by the Human Ethics Research Committee of the School of Dentistry of Ribeirão Preto - USP (process 2009.1.590.58.4/ 004.0.138.000-09).