Karakousoglou, MariaAlThenyan, Turki2025-08-182024https://hdl.handle.net/20.500.14154/76185(1) Background: To assess tooth movement using three different commercially available thermoplastic materials.; (2) Methods: A fully aligned typodont was digitally modified to displace a maxillary right central incisor 1.20-mm palatally. Four sub-setup models were created for each thermoplastic material using an Ortho software analyzer to produce an aligner sequence in which the max-illary right central incisor discrepancy will be corrected by 0.30-mm in each stage. A total of twelve aligners were divided randomly into three groups based on the thermoplastic material.; (3) Results: The displaced maxillary right central incisor in group A, group B, and group C moved labially by 1.08-, 1.05-, and 1.20-mm, respectively. The incisal edge in group A, group B, and group C moved apically by 0.29-, 0.45-, and 0.66-mm, respectively.; (4) Conclusions: Many factors contribute to the clinical performance of clear aligners; mainly, the material construction and thickness. The average correction per aligner for group A, group B, and group C was 0.27-, 0.26- and 0.30-mm, respectively.11en-USClear alignersIn-house alignerThermoplastic materialsTooth movementThesis