Introduction: The aim of this study was to examine the theses made in orthodontic postgraduate education and to analyze the trends in terms of selected topics. Methods: Doctoral (PhD), master's (MSc) and specialization theses completed between 2017- 2021 in the field of orthodontics in Turkey were examined. Turkish National Thesis Center database was searched online. Theses completed at both public and private universities were included in the study. Results: A total of 563 theses were analyzed. 24 (4.2%) of the theses were master's, 125 (22.2%) doctorate and 424 (73.6%) specialization thesis. 173 (30.7%) of the thesis were reports the treatment outcome, 170 (30.2%) were diagnostic, 147 (26.1%) were material studies, 27 (4.8%) of theses were on finite element analysis, 22 (3.9%) were on animal experiment and 5 (0.9%) were about education. According to the methodology, it was found that 235 (41.7%) of theses were based on clinical studies, 121 (21.5%) were laboratory studies, 126 (22.4%) were measurement studies (models, films, photographs etc), 45 (8%) were questionnaires and 33 (5.9%) were computer-based studies. Discussion and Conclusion: Due to the widespread use of 3- D imaging methods, most of the theses were made using these technologies. Deep bite, artificial intelligence, vibration therapy, lingual orthodontics and aligners were the least studied subjects.