About the Authors

Sandra Echtermeyer

Contributed equally to this work with: Sandra Echtermeyer, Philine H. Metelmann

Roles Data curation, Formal analysis, Investigation, Validation

Affiliation Echtermeyer Dental Practice, Leipzig, Germany

Philine H. Metelmann

Contributed equally to this work with: Sandra Echtermeyer, Philine H. Metelmann

Roles Visualization, Writing – original draft, Writing – review & editing

Affiliation Department of Orthodontics, Center for Dental, Oral and Craniomandibular Sciences, University Medicine Greifswald, Greifswald, Germany

Alexander Hemprich

Roles Conceptualization, Resources, Supervision

Affiliation Department of Maxillofacial Surgery and Plastic Surgery, University Medicine Leipzig, Leipzig, Germany

Karl-Heinz Dannhauer

Roles Conceptualization, Methodology, Supervision

Affiliation Department of Orthodontics, Center for Dental, Oral and Craniomandibular Sciences, University Medicine Greifswald, Greifswald, Germany

Karl-Friedrich Krey

Roles Formal analysis, Project administration, Software, Supervision, Visualization, Writing – original draft

kreyk@uni-greifswald.de

Affiliation Department of Orthodontics, Center for Dental, Oral and Craniomandibular Sciences, University Medicine Greifswald, Greifswald, Germany

Competing Interests

One author (SE) is working as a dentist in her own dental practice (Echtermeyer Dental Practice), which is privately owned by herself. There are no patents, products in development or marketed products to declare. This does not alter our adherence to all the PLOS ONE policies on sharing data and materials.