Since 1988, Siegbert Witkowskihas been working as Chief Dental Technician in the Department of Prosthodontics, University Hospital of Freiburg, School of Dentistry (Chair: Prof. Dr. B. Spies; Chair until 2016: Prof. Dr. Dr. h.c. J.R. Strub). He earned his diploma in Dental Technology from an apprenticeship program in Hannover, Germany. He did postgraduate studies and gained work experience at the following institutions: University of London, Royal Dental Hospital (1983-1984); University of Zürich, School of Dentistry (1984-1986); University of Southern California, School of Dentistry (1986-1988). Mr. Witkowski was certified as a Dental Technician (CDT) by the National Board of Certification of Dental Laboratory Technology (USA) in 1986. In 1991, he earned the diploma of the German Master Dental Technician from the master school in Freiburg, Germany. Siegbert Witkowski was co-editor and -founder of the German journal „Implantologie” [Implantology] (1993-2000). For the monthly journal „Quintessenz der Zahntechnik” [Quintessence Dental Technology] also by Quintessence Publishing (Berlin, Germany) he was serving as editorial board member (1997-2000), vice editor-in-chief (2004-2006) before being appointed as editor-in-chief (2007). In 2001 he was editorial chairman of the „Internationale Zahntechnik Magazin” [International Dental Technology Magazine] published by Flohr Publ. (Rottweil, Germany). He co-authored several book chapters, a textbook for dental students “Curriculum Prothetik” (1. ed. 1994 - 5. ed. 2021), a book on implant prosthodontics „Enossale orale Implantologie aus prosthetischer Sicht“ [Endosseous implantology from the prosthodontic point of view], published in 1996 by Quintessence Publishing and numerous journal articles. In recent past, he co-authored a book on dental CAD/CAM technology together with Prof. Dr. W. Att (Tufts University, Bosten, USA) and Prof. Dr. J.R. Strub (Emeritus, Freiburg) titled “Digital Workflow in Reconstructive Dentistry” published by Quintessence Publishing (2019). Siegbert Witkowski is a member of several national and international professional organizations.

June 2, 1968: Born in Kempten im Allgäu; 1990–1995: Studied dentistry at the Philipps University of Marburg; 1993: Accepted into the German National Academic Foundation; 1996: Doctoral studies at the University of Marburg; 1997: Assistant dentist in a dental practice near Cologne; 1998: Completed his doctorate on the subject of “Temperature development in dentine during dental preparation”; Since January 1998: Research assistant at the Clinic for Dental Prosthetics, Propaedeutics and Materials Science at the University Medical Center Schleswig-Holstein, Campus Kiel; April 2000: Appointment as senior physician; May 2001: Appointment as “Specialist for Prosthetics” by the German Society for Dental Prosthetics and Materials Science; 2006: Completion of the implantology curriculum (DGI); May 2006: Completion of habilitation (topic: “Evidence-based assessment of dental esthetics to improve quality of life”); Oct 2008: Appointment at the RWTH Aachen University to the W3 Professorship Clinic for Dental Prosthetics and Biomaterials, Center for Implantology; Since Oct 2008: Director of the Clinic for Dental Prosthetics and Biomaterials, Center for Implantology at the University Hospital Aachen; Since Nov 2008: Clinical focus for many years on dental implantology and implant prosthetics. In addition to implantology and implant prosthetics, Prof. Wolfarts’s research focuses on dental esthetics, the clinical testing of new all-ceramic materials, and the associated improvement in quality of life. He is a certified implantologist of the German Society of Oral Implantology (DGI) and an ITI Fellow (International Team for Implantology); Sep 2014: His book “Implant Prosthodontics – A patient-oriented concept” was published by Quintessence Publishing.

Benjamin Wu, DDS, PhD, received his dental degree from the University of Pacific, his postgraduate training in prosthodontics at Harvard School of Dental Medicine, and PhD in Materials Engineering from the Massachusetts Institute of Technology. He has succeeded Dr John Beumer as Chair of the Division of Advanced Prosthodontics, and he is also Director of the Weintraub Center for Reconstructive Biotechnology.  He is Former Chair of the Department of Bioengineering in the UCLA School of Engineering, and he holds formal appointments in the Departments of Materials Science & Engineering and Orthopedic Surgery.  Dr Wu has published over 250 peer-reviewed scientific papers and over 40 patents, and he received continuous National Institutes of Health (NIH) funding for his innovative research. His citations rank him among the top 2% of scientists according to Stanford‘s standardized citation metrics across all scientific disciplines. He is Fellow of the Academy of Prosthodontics and enjoys patient care in the UCLA Faculty Group Dental Practice.

Dr. Yamauchi earned his Doctor of Dental Surgery degree, as well as his master’s degree and specialty certificate in endodontics, from the University of North Carolina at Chapel Hill School of Dentistry. He has conducted research and published papers in the field of regenerative endodontics, and co-authored papers on autotransplantation of teeth with Dr. Mitsuhiro Tsukiboshi (Amagun, Aichi, Japan). Dr. Yamauchi is a board-certified diplomate of the American Board of Endodontics. Island Endodontics, his private practice, is in Honolulu, Hawai’i. 

Doctor of Stomatology (Center of Periodontology),
Periodontist, graduated from Peking University School and Hospital of Stomatology,
Member of the Periodontology Committee of the Chinese Stomatological Association

Doctor of Stomatology, Prosthodontist, graduated from and Attending at Peking University and Hospital of Stomatology
Member of the European Association for Osseintegration (EAO), Member of the International College of Prosthodontists (ICP), Chinese Society of Stomatology, Temporomandibular Joint Diseases and Academic Committee member

Professor and Chair
Division of Periodontology
Niigata University Graduate School of Medical and Dental Sciences
Niigata, Japan