1. *Sebastian Soliman, DMD, University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Würzburg, Germany
2. Gabriel Krastl, DMD, professor, University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Würzburg, Germany
3. Alexander Winkler, DMD, University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Würzburg, Germany
4. Roland Frankenberger, DMD, professor, Department of Conservative Dentistry, Dental School, University Hospital Marburg, Marburg, Germany
5. Britta Hahn, DMD, University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Würzburg, Germany