Hard- and soft-tissue profiles of the midface region in patients with skeletal Class III malocclusion using cone-beam computed tomography multiplanar-reconstructed image analysis
김보미, 이형철, 김성훈, 김용일, 손우성, 김성식,
소속 상세정보
김보미 ( Kim Bo-Mi ) - Pusan National University Dental Hospital Department of Orthodontics
이형철 ( Lee Hyung-Chul ) - Pusan National University Dental Hospital Department of Orthodontics
김성훈 ( Kim Seong-Hun ) - Pusan National University Dental Hospital Department of Orthodontics
김용일 ( Kim Yong-Il ) - Pusan National University Dental Hospital Department of Orthodontics
손우성 ( Son Woo-Sung ) - Pusan National University Dental Hospital Department of Orthodontics
김성식 ( Kim Seong-Sik ) - Pusan National University Dental Hospital Department of Orthodontics
Abstract
Objective: This study examined cone-beam computed tomography (CBCT)-derived multiplanar-reconstructed (MPR) cross-sections to clarify the salient characteristics of patients with skeletal class III malocclusion with midface deficiency (MD).
Methods: The horizontal and sagittal plane intersection points were identified for middle-third facial analysis in 40 patients in the MD or normal (N) groups. MPR images acquired parallel to each horizontal plane were used for length and angular measurements.
Results: A comparison of the MD and N groups revealed significant differences in the zygoma prominence among female patients. The convex zygomatic area in the N group was larger than that in the MD group, and the inferior part of the midface in the N group was smaller than that in the MD group for both male and female patients. A significant difference was observed in the concave middle maxillary area among male patients.
Conclusions: This study was conducted to demonstrate the difference between MD and normal face through MPR images derived from CBCT. Male patients in the MD group had a more flattened face than did those in the N group. Female patients in the MD group showed a concave-shaped lower section of the zygoma, which tended to have more severe MD. These findings indicate that orthognathic surgery to improve skeletal discrepancy requires different approaches in male and female patients.
키워드
Cone-beam computed tomography; Multiplanar-reconstructed image; Class III malocclusion; Midface deficiency
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