1. Department of Dentofacial Orthopaedics and Orthodontics, Division of Facial Abnormalities, Medical University of Wrocław, Wrocław, Poland
2. Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Wrocław, Poland
3. Department of Dentofacial Orthopaedics and Orthodontics, Medical University of Wrocław, Wrocław, Poland
4. Department of Orthodontics, Technische Universität Dresden, Dresden, Germany