Dr. Peter Wetselaar, MSc, PhD, dentist and specialist in functional diagnostics and therapy of CMD and tooth wear, Chair in the Department and Clinic of General Dentistry, Academic Center for Dental Medicine Amsterdam (ACTA), Amsterdam/Netherlands

Dr. Tobias Wilck, a specialist in oral and maxillofacial surgery, can look back on an impressive career. Born in 1967 in Hamburg, he completed his medical studies at the University of Hamburg and gained experience in Kingston (Jamaica) and Vienna before completing his dental studies in Hamburg and Tübingen. His specialist training took him to Hamburg, Tübingen, and finally to Krefeld-Uerdingen, where he worked as a senior physician. Dr. Wilck is certified in plastic-aesthetic surgery and implantology and has been involved in humanitarian missions in Vietnam since 2010, where he treats children with facial injuries, especially those with cleft lip, jaw, and palate. As a member of the German Society of Oral and Maxillofacial Surgery (DGMKG), Dr. Wilck brings a wealth of expertise and experience to the treatment of his patients.

As one of the world's most recognized prosthodontists and ceramists, Dr. Winter teaches dentists in Spear Workshops to understand the interdependence between laboratory procedures, treatment planning, restorative techniques, materials and laboratory procedures.

In addition to teaching, Dr. Winter produces Spear Study Club modules and creates a variety of clinical content for the Spear learning ecosystem. He has taught more than 900 didactic, clinical and technical courses in more than 40 countries. For the past 36 years, he has maintained a private practice limited to prosthodontics, and currently practices in Newport Beach, California. He is co-founder of Esthetics by Design dental laboratory and is past president of the American Academy of Esthetic Dentistry.

Dr. Winter graduated in 1981 from Marquette University School of Dentistry and completed his prosthodontic specialty residency at the VA Medical Center in Milwaukee in 1983.

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.

• 2007 Staatsexamen Zahnmedizin an der Albert-Ludwigs-Universität Freiburg i. Br.  
• 2007-2023 Assistenzzahnarzt und Wissenschaftlicher Mitarbeiter, Abteilung für Zahnerhaltungskunde und Parodontologie des Universitätsklinikums Freiburg
• 2010 Promotion mit dem Titel „Evaluation zweier computergestützter Lernprogramme in der Parodontologie“
• 2010 Oral-B blend-a-med Prophylaxepreis 2010 unter Schirmherrschaft der Deutschen Gesellschaft für Kinderzahnheilkunde
• 2012 Curriculum "Zahnärztliche Hypnose und Kommunikation" (DGZH e.V.)
• 2012 Mitarbeit beim Nationalen Kompetenzbasierten Lernzielkatalog Zahnmedizin (NKLZ) der DGZMK/VHZMK im Bereich Prävention
• 2013 Early Career Excellence in Dental Education Award der European Association for Dental Education  (ADEE)
• 2014, 2015, 2018 Lehrpreise der zahnmedizinischen Fakultät
• 2016 Tagungsbestpreis der Arbeitsgemeinschaft für Grundlagenforschung in der DGZMK
• 2017 Habilitation im Fach Zahnheilkunde an der Albert-Ludwigs-Universität Freiburg
• 2018 Zusatzbezeichnung „Ernährungsmediziner (DAEM, DGEM)“
• 2019 DGParo Meridol Preis für die beste wissenschaftliche Publikation
• 2019 – 2023 Stellvertretender Studiengangsleiter „Master Parodontologie und Implantattherapie“ an der Albert-Ludwigs-Universität Freiburg
• 2021 Ernennung zum außerplanmäßigen Professor an der Medizinischen Fakultät der Albert-Ludwigs-Universität Freiburg
• Seit 2023 Professur für Parodontologie und Leitung des Bereich Parodontologie an der Medizinischen Fakultät Carl Gustav Carus an der TU Dresden
• 2023 DGParo-Spezialist für Parodontologie®