Theodosia Bartzela graduated as a dentist (DDS) from the Aristotelion University of Thessaloniki, School of Dental Medicine. She specialized in Pediatric Dentistry at Tufts University in Boston, MA, USA. In 1992, she received an MSc. at Harvard University, School of Public Health in Boston, MA, USA. In 2003, she pursued a specialization in Orthodontics, followed by completing her Dr. med.dent degree at the University of Freiburg, Germany. Subsequently, she worked as a Senior Lecturer at the University of Basel, Switzerland. In 2006, she was appointed as an Assistant Professor at the Radboud University Nijmegen Medical Centre in the Department of Orthodontics and Craniofacial Biology. She received her PhD degree from the same university. She received the 2011 “Samuel Berkowitz Long-Term Outcomes Study Award”. In 2010, she was elected Assistant Professor at the Aristotelian University of Thessaloniki, Greece. From 2012 to 2014, she served as the Director of the Orthodontic Department at the Dental Academy for Continuing Educational Development in Karlsruhe, Germany. From 2015 to 2022, she was appointed at Charite, Berlin, Germany, CC3 Center for Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics. She has been appointed Professor and Head of the Orthodontic Department at the University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany,  since 2022.