Crown-root angulations of the maxillary anterior teeth according to malocclusions: A cone-beam computed tomography study in Korean population
이경훈, 최동순, 장인산, 차봉근,
소속 상세정보
이경훈 ( Lee Kyoung-Hoon ) - Gangneung-Wonju National University College of Dentistry Department of Orthodontics
최동순 ( Choi Dong-Soon ) - Gangneung-Wonju National University College of Dentistry Department of Orthodontics
장인산 ( Jang In-San ) - Gangneung-Wonju National University College of Dentistry Department of Orthodontics
차봉근 ( Cha Bong-Kuen ) - Gangneung-Wonju National University College of Dentistry Department of Orthodontics
Abstract
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.
키워드
Computed tomography; Tooth shape; Class III; Malocclusion
원문 및 링크아웃 정보
등재저널 정보