Nicolas P. Hardt is Professor and was Head of the Clinic for Cranio-Maxillofacial Surgery, Kantonsspital, Lucerne, Switzerland from 1974 until 2007. Dr. Hardt graduated in Dentistry and Medicine at the University of Bonn, Germany, and subsequently completed a residency at the Clinic for Cranio-Maxillofacial Surgery in Bonn. In 1970 he was appointed Senior Assistant in the Clinic for Cranio-Maxillofacial Surgery at the University of Berne in Switzerland. He then qualified as a Specialist for Cranio-Maxillofacial Surgery in both Switzerland (1974) and Germany (1975). Dr. Hardt completed his Habilitation (Privatdozent for Cranio-Maxillofacial Surgery) in 1981 and became a Full Professor at the University of Zurich in 1990.
Peter Kessler is Professor and Head of the Department of Cranio-Maxillofacial Surgery, Maastricht University Medical Center (MUMC), Maastricht, The Netherlands. Dr. Kessler graduated in Dentistry and Medicine at the University of Erlangen-Nürnberg, Germany, in 1986 and 1997 respectively and completed his Habilitation at the university in 2001. He qualified as a Specialist in Cranio-Maxillofacial Surgery in 1999 and also holds a qualification in plastic surgery (2003). From 1999 to 2001 he was employed as a Specialist at the Oral, Maxillofacial, and Facial Surgery Clinic, University Clinic of Erlangen-Nürnberg; thereafter he became a Senior Lecturer and Vice-Director at the clinic before taking up his current position in Maastricht in 2007.
Johannes Kuttenberger is Privatdozent and Head of the Clinic for Cranio-Maxillofacial Surgery, Kantonsspital, Lucerne, Switzerland since 2005. Dr. Kuttenberger graduated in Dentistry and Medicine at the University of Erlangen-Nürnberg, Germany, in 1983/1990. He qualified as a Specialist in Cranio-Maxillofacial Surgery in 1994 and completed his Habilitation at the University of Basel in 2011. From 1989 to 1995 he was employed as a Specialist at the Oral, Maxillofacial, and Facial Surgery Clinic, University Clinic of Erlangen-Nürnberg and then from 1996 to 2004 at the Clinic for Cranio-Maxillofacial Surgery, Lucerne, Switzerland as Vice-Director before taking up his current position in 2005 in Lucerne.