Three-dimensional evaluation of a virtual setup considering the roots and alveolar bone in molar distalization cases.

Autor: Huh J; Department of Orthodontics, Yonsei University College of Dentistry, Seoul, Korea., Liu J; Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Korea., Yu JH; Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Korea., Choi YJ; Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Korea., Ahn HK; Graduate School of Artificial Intelligence, Department of Computer Science and Engineering, Pohang University of Science and Technology, Pohang, Korea.; Institute for Convergence Research and Education in Advanced Technology, Yonsei University, Seoul, Korea., Chung CJ; Department of Orthodontics, Institute of Craniofacial Deformity, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea., Cha JY; Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Institute for Innovation in Digital Healthcare, Yonsei University, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea. jungcha@yuhs.ac., Kim KH; Department of Orthodontics, Institute of Craniofacial Deformity, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea. khkim@yuhs.ac.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Sep 11; Vol. 13 (1), pp. 14955. Date of Electronic Publication: 2023 Sep 11.
DOI: 10.1038/s41598-023-41480-z
Abstrakt: We aimed to evaluate root parallelism and the dehiscence or fenestrations of virtual teeth setup using roots isolated from cone beam computed tomography (CBCT) images. Sixteen patients undergoing non-extraction orthodontic treatment with molar distalization were selected. Composite teeth were created by merging CBCT-isolated roots with intraoral scan-derived crowns. Three setups were performed sequentially: crown setup considering only the crowns, root setup-1 considering root alignment, and root setup-2 considering the roots and surrounding alveolar bone. We evaluated the parallelism and exposure of the roots and compared the American Board of Orthodontics Objective Grading System (ABO-OGS) scores using three-dimensionally printed models among the setups. The mean angulation differences between adjacent teeth in root setups-1 and -2 were significantly smaller than in the crown setup, except for some posterior teeth (p < 0.05). The amount of root exposure was significantly smaller in root setup-2 compared to crown setup and root setup-1 except when the mean exposure was less than 0.6 mm (p < 0.05). There was no significant difference in ABO-OGS scores among the setups. Thus, virtual setup considering the roots and alveolar bone can improve root parallelism and reduce the risk of root exposure without compromising occlusion quality.
(© 2023. Springer Nature Limited.)
Databáze: MEDLINE
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