Prof. Dr. Karl-Friedich Kray & Dr. Anja Ratzmann

Prof. Dr. Karl-Friedrich Krey

Germany

  • 1993-1998: Degree in Dentistry
  • 1999-2003: postgraduate education "Fachzahnarzt für Kieferorthopädie" University Leipzig and Doctoral thesis
  • 2005-2007: "Master of Medical Education", University Heidelberg
  • 2010: Habilitation deputy Head of Department of Orthodontics at University Leipzig
  • 2013: Head of Department of Orthodontics, University Medicine Greifswald
  • Memberships in various national and international scientific societies as well as reviewer of internationally recognized journals.


Focus of research and clinical work

  • Mathematical modeling/multivariate statistics in Orthodontics and related Anthropology
  • Epidemiology, health services research
  • Cold Atmospheric Plasma (CAP) research
  • Treatment of children and adults with craniofacial anomalies, cleft-lip and palate
  • Digital orthodontics, CAD/CAM, Aligners


Dr. Anja Ratzmann

Germany

  • 1993–1999: Studies in dentistry at the Free University of Berlin/ Humboldt University of Berlin 
  • 13 December 1999: Licence to practice German dentistry 
  • 2000: Training assistant at dental practice in Berlin 
  • since November 2000: Research assistant in the Polyclinic for Prosthetics and Materials Science of the Centre for Dentistry, Oral, and Maxillofacial Medicine (ZZMK) of the University of Greifswald 
  • 2003–2008: Training assistant – Polyclinic for Orthodontics, ZZMK of the University of Greifswald  
  • 2004: Doctorate (Dr med. dent.)  
  • 2007: Certification as study director/coordinator for clinical studies (Coordination Centre for Clinical Studies (KKS) Charité) 
  • 2007: Completion of postgraduate MSc programme  
  • Since 2008: Specialist dentist, Polyclinic for Orthodontics, University Medicine Greifswald with authorisation for further training (2013) for the speciality "Orthodontics", Dental Association of Mecklenburg-Western Pomerania 


Work areas:

  • Community Dentistry 
  • Teaching research and design of new teaching and examination formats for pre-clinical training and orthodontic teaching  
  • Postgraduate training – conception of the postgraduate Master’s degree programmes "Dental functional diagnostics and therapy with computer support" and "Dental aesthetics and function" 
  • Craniomandibular dysfunction 
  • Digital orthodontics 


  • Abstract

    Ten Years of In-Office Aligners in the Digital Workflow. Conclusion and a Look to the Future


    In addition to the initial attempts to achieve progressive tooth movements with aligners based on sequential set-ups on plaster models, the first personal experience with the Invisalign® system was gained from 2006 onwards. Aligner orthodontics is now an integral part of our treatment concept. In recent years, it has been subject to further systematic development in practice and science.


    In the presentation, various aspects of this development will be explored and supplemented by our own practical experience. In addition to the scientific knowledge gained from numerous studies, we will focus on intraoral scanning, software, principles of staging and movement planning, 3D printing, and aligner production in our own laboratory. Direct aligner pressure will also be taken into account. Successful treatments as well as mistakes and failures will be discussed and analysed. One dynamic and important area that has recently changed in is networking in further education and the open exchange between colleagues in social networks and on Internet platforms. Finally, aligner orthodontics has become an integral part of university training in Greifswald.

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