1. Department of Oral Surgery, School of Dentistry, Fluminense Federal University, Niterói 24020-140, Brazil
2. Department of Implant Dentistry, Universidade Iguaçu, Nova Iguaçu, Rio de Janeiro 26260-045, Brazil
3. Department of Dentistry, San Raffaele Hospital, 20132 Milan, Italy
4. Department of Oral & Maxillofacial Surgery, University of Grande Rio-UNIGRANRIO, Rio de Janeiro 25071-202, Brazil
5. Department of Periodontology, Dental Research Administration, Tufts University School of Dental Medicine, Boston, MA 02111, USA