The editors Serge Dibart, DMD, is Professor and Chair of the Department of Periodontology and Director of the periodontology advanced education program at the Boston University Henry M. Goldman School of Dental Medicine in Boston, Massachusetts, USA. Thomas Dietrich, D.D.S, M.D. is Professor and Head of Oral Surgery at the School of Dentristy, University of Birmingham, UK, and Associate Professor of Health Policy and Health Services Research at Boston University Goldman School of Dental Medicine in Boston, Massachusetts, USA.