Jana Schmitz, Ludger Keilig, Nikolaos Daratsianos, Christoph Bourauel
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引用次数: 0
Abstract
Purpose: Using a commercial orthodontic treatment planning system, tooth movements were simulated to analyse how precise predefined movements can be determined by three different superimposition methods. Additionally, a retrospective analysis on clinical patient models before and after orthodontic treatment was performed to analyse possible differences in determination of clinical tooth movements with these methods.
Methods: (1) A hexapod system was used to perform the tooth movements in physical maxillary dental models (N = 70). The initial and final situations were scanned, superimpositions executed, movements calculated, and their accuracy compared to the predefined movements was determined. (2) Digital three-dimensional (3D) maxillary dental models representing pre- and postorthodontic treatment situations (N = 100 patients) were superimposed. Selected tooth movements were calculated (N = 3600), and the results of the different superimposition methods were compared pairwise.
Results: (1) The experimental study delivered only small location and scale shifts. Furthermore, concordance correlation coefficients above 0.99 for all three methods. This verified that all methods deliver values corresponding well to the predefined movements. (2) The retrospective analysis of the clinically performed orthodontic tooth movements comparing pairwise the three different methods intraindividually also showed small location and scale shifts. Furthermore, concordance correlation coefficients between 0.68 and 0.98 were observed, with only three of them below 0.8. This verified that the applied superimposition methods delivered values sufficiently close to each other.
Conclusions: As the experimental study showed very good agreement between the predefined and determined movements, and as the retrospective clinical study showed that the methods compared pairwise delivered values close to each other for the performed orthodontic tooth movements, it can be concluded that orthodontic tooth movements can be determined adequately correct by each of the examined methods.
期刊介绍:
The Journal of Orofacial Orthopedics provides orthodontists and dentists who are also actively interested in orthodontics, whether in university clinics or private practice, with highly authoritative and up-to-date information based on experimental and clinical research. The journal is one of the leading publications for the promulgation of the results of original work both in the areas of scientific and clinical orthodontics and related areas. All articles undergo peer review before publication. The German Society of Orthodontics (DGKFO) also publishes in the journal important communications, statements and announcements.