Following his physiotherapy certification, Dr. Kolster studied human biology and human medicine in Marburg. He has undertaken further clinical studies in physical medicine and other disciplines, with a special focus on the presentation and application of reflex-therapeutic procedures. Dr. Kolster is the author and editor of scientific textbooks in the fields of medicine, physiotherapy, naturopathic medicine, and physical medicine.

Abteilungsleiter in verschiedenen Laboratorien, mehrjährige Tätigkeit in der Industrie, Mitwirkung an der Entwicklung von Prothesen-Fertigstellungssystemen und deren Materialien, Eigene Entwicklungen: das Prothesen-Fertigstellungssystem und deren Materialien PremEco-Line, im Vertrieb der Firma Merz Dental GmbH, Lütjenburg, sowie das Prothetik-Color-System zum farblichen Charakterisieren von Prothesen und das Cera-Color-Set zum farblichen Charakterisieren der Wachsmodellation, seit 1992 selbstständiger und firmenunabhängiger Schulungsleiter für alle Bereiche der Totalprothetik im In- und Ausland, Vorträge und Workshops, unter anderem in den meisten Ländern Europas sowie Japan, Gründungsmitglied der „Dental Excellence International Laboratory Group“, Autor zahlreicher Beiträge in der nationalen und internationalen Fachpresse, Begründer der T i F®-Aufstellmethode, einem praxisnahen und prüfungsorientierten Verfahren zum methodischen Erlernen von Prothesenaufstellungen, veröffentlicht in den Büchern: „T i F®-Totalprothetik in Funktion“ und „Individuelle Totalprothetik – Erfolgreiche Patientenversorgung nach dem T i F®-System“, beide Quintessenz-Verlag, Berlin, Seit Dezember 2009 Inhaber des Fachlabors TRIGOdental – einem Fachlabor für funktionelle und individuelle Totalprothetik, Bonn-Oberkassel

Dr Korkut graduated from Marmara University Faculty of Dentistry in 2008 and completed his doctorate thesis and PhD in Restorative Dentistry at Marmara University Faculty of Dentistry Department of Dental Diseases and Treatments in 2015. He has worked as an academic at Marmara University Faculty of Dentistry Department of Restorative Dentistry since 2015, earning an Assistant Professor title in 2018 and an Associate Professor title in 2022. Dr Korkut has many national and international scientific publications about direct and indirect restorations, prerestorative clear aligners, tooth bleaching, clinical dental photography, tooth wear, CAD/CAM restorations, magnification in dentistry, and caries diagnosis and management. He has presented many scientific lectures in national and international dental meetings about dental photography, anterior/posterior composite and ceramic restorations, clear aligners, ICON therapy, tooth bleaching, tooth wear, and restoration complications since 2015. He is a certified Invisalign provider. He has participated as an instructor in more than 100 hands-on courses since 2015. He is a member of the GC Europe Restorative Advisory Board and the Bio-Emulation Group. He is also a key opinion leader and official international speaker of several leading international dental companies such as GC Corp, Hu-Friedy Group Europe, Tokuyama, Dentsply Sirona, Align Technology, Eighteeth, iVeneer, Polydentia, Ivoclar, Busch, and Horico.

Since 1990 keynote speaker at numerous national and international scientific congresses, teaching for different dental institutes in the fields of periodontics and implantology, different publications concerning periodontics, aesthetics and implantology. He is a board member of different clinical journals, “Implantologie“, “Team work“, etc. In 1999 he specialized in “Implantology” - BDIZ. Since 2007 faculty member of the German Society of Periodontology and Dresden International University (DIU), responsible for master program module: “Decision making in modern periodontal concepts”. Since 2015 Active Member of the EAED (European Academy of Esthetic Dentistry). 2016 Member of Team Europe “America meets Europe”, DGÄZ in cooperation with DGI, AIOP, Seattle Study Club. In 2018 published textbook with Arndt Happe: “Success with implants in the esthetic zone“, Quintessence Berlin.

1993–1998: Study of dentistry at the University of Mainz. 1998–2001: Research associate in the Department of Dental Conservation and Periodontology at the University of Mainz. 2000: Doctorate. 2001–2003: Practice-related studies in business administration at the Business Administration Institute of Prof. Dr. Braunschweig, graduating with a degree in health economics. 2001–2004: Employed dentist at the Center for Dentistry and associate at the Private Institute for Periodontology and Implantology Munich with Dr. W. Bolz, Prof. Dr. H. Wachtel, Prof. Dr. M. Hürzeler and Dr. O. Zuhr. Since 2004: Established in own practice in Mainz with focus on implantology, periodontology, functional diagnostics and restorative dentistry. Since 2015: Joint practice with Dr. Ina Köttgen MSc. specializing in functional diagnostics, periodontology, implantology and restorative dentistry. 2017: Publications in numerous journals on the topics of periodontology, implantology, prophylaxis and esthetics. Multiple lecturing activities on the topics of periodontology, prophylaxis, esthetic dentistry and implantology and implant prosthetics and complex treatment planning. Lecturer of the master course " Master Online Periodontology" of the University of Freiburg. Chairman of the Intensive Continuing Education and Continuum Department of the BZKR. Member of the Representative Assembly of the BZK Rheinhessen. Deputy Chairman of the Representative Assembly of the BZK Rheinhessen. Member of the editorial board of "Der junge Zahnarzt" (Springer Verlag).

Ina Köttgen, Dr med dent, MSc, maintains a joint private practice with Dr Christopher Köttgen in Mainz, Germany, limited to functional diagnostics, periodontology, implantology, and restorative dentistry. She is a member of several professional organizations, including the German Society for Periodontology.

Doctor Stefen Koubi graduated from the University of Marseille, France, in 1998. He has held the position of Associate Professor in the Restorative Department of Marseille University since 2008 and received his PhD in 2011. He maintains a private practice in Marseille and in Paris. His main areas of interest are esthetic rehabilitation for cosmetic or functional reasons (worn dentition). He has been invited to many prestigious esthetic academies to lecture on simple ways to achieve high-quality esthetic dentistry. He is an invited professor in many esthetic postgraduate programs. Dr Koubi received the Gold Molar title from the students of his university (best teacher of the year) in 2012, and the title of Best French Speaker the same year. Since 2012 he has been a member of Style Italiano community in charge of indirect topics. He founded in 2013 L'Institut de la facette, a private training center focused on smile design for worn dentition and cosmetic rehabilitations. He is the author or co-author of many scientific articles and case reports on esthetic dentistry.

e-mail: krammer@quintessenz.de