1 Department of Orthodontics, School of Health Sciences, Faculty of Dentistry, Aristotle University of Thessaloniki Department of Training and Operations, 424 Military Hospital of Thessaloniki, Greece.
2 Department of Orthodontics, School of Dentistry, University Medical Centre Regensburg, Departments of.
3 Orthodontics Oral Technology, University of Bonn, Germany.
4 Department of Orthodontics, School of Health Sciences, Faculty of Dentistry, Aristotle University of Thessaloniki.