Crown-root angulations of the maxillary anterior teeth according to malocclusions: A cone-beam computed tomography study in Korean population.

Autor:	Lee KH; Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea., Choi DS; Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea., Jang I; Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea., Cha BK; Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea.
Jazyk:	angličtina
Zdroj:	Korean journal of orthodontics [Korean J Orthod] 2022 Nov 25; Vol. 52 (6), pp. 432-438. Date of Electronic Publication: 2022 Aug 23.
DOI:	10.4041/kjod22.126
Abstrakt:	Objective: To compare crown-root angulations of the permanent maxillary anterior teeth in skeletal Class I, Class II, and Class III Korean malocclusion patients using cone-bean computed tomography (CBCT) images. Methods: Sixty CBCT images were collected from orthodontic patients archive based on skeletal Class I (0˚< A point-nasion-B point angle [ANB] < 4˚), Class II (ANB ≥ 4˚), and Class III (ANB ≤ 0˚) to have 20 samples in each group. Mesiodistal crown-root angulation (MDCRA) and labiolingual crown-root angulation (LLCRA) were evaluated after orientation of images. Crown-root angulations were compared among Class I, Class II, and Class III groups and among the maxillary anterior teeth in each group. Results: LLCRAs of the maxillary central incisor and the lateral incisor were significantly lower in Class III group than those in Class I group. However, those of the canine showed no significant differences among groups. MDCRAs of the maxillary anterior teeth did not significantly differ among groups either. Conclusions: Our results suggest that skeletal Class III malocclusion might affect LLCRA of the maxillary incisors, especially the central incisor.
Databáze:	MEDLINE
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