1 Oral and Maxillofacial Surgery Program, Pernambuco School of Dentistry (Faculdade de Odontologia de Pernambuco) Pernambuco, Brazil auremir@globo.com; thiago.ctbmf@yahoo.com.br Oral and Maxillofacial Surgery Program, Ribeirão Preto School of Dentistry (Faculdade de Odontologia de Ribeirão Preto) São Paulo, Brazil Oral and Maxillofacial Surgery Program Pernambuco School of Dentistry (FOP/UPE) Pernambuco, Brazil.