Midfacial soft tissue changes after maxillary expansion using micro-implant-supported maxillary skeletal expanders in young adults: A retrospective study
Nguyen Hieu, 신정원, Giap Hai-Van, 김기범, 채화성, 김영호, 최해원,
소속 상세정보
( Nguyen Hieu ) - Ajou University School of Medicine Department of Orthodontics
신정원 ( Shin Jeong-Won ) - Ajou University School of Medicine Department of Orthodontics
( Giap Hai-Van ) - Ajou University School of Medicine Department of Orthodontics
김기범 ( Kim Ki-Beom ) - Saint Louis University Department of Orthodontics
채화성 ( Chae Hwa-Sung ) - Ajou University School of Medicine Department of Orthodontics
김영호 ( Kim Young-Ho ) - Ajou University School of Medicine Department of Orthodontics
최해원 ( Choi Hae-Won ) - Sungkyunkwan University School of Medicine Samsung Medical Center Department of Orthodontics
Abstract
Objective: The aim of this retrospective study was to assess the midfacial soft tissue changes following maxillary expansion using micro-implant-supported maxillary skeletal expanders (MSEs) in young adults by cone-beam computerized tomography (CBCT) and to evaluate the correlations between hard and soft tissue changes after MSE usage.
Methods: Twenty patients (mean age, 22.4 years; range, 17.6?27.1) with maxillary transverse deficiency treated with MSEs were selected. Mean expansion amount was 6.5 mm. CBCT images taken before and after expansion were superimposed to measure the changes in soft and hard tissue landmarks. Statistical analyses were performed using paired t-test and Pearson’s correlation analysis on the basis of the normality of data.
Results: Average lateral movement of the cheek points was 1.35 mm (right) and 1.08 mm (left), and that of the alar curvature points was 1.03 mm (right) and 1.02 mm (left). Average forward displacement of the cheek points was 0.59 mm (right) and 0.44 mm (left), and that of the alar curvature points was 0.61 mm (right) and 0.77 mm (left) (p < 0.05). Anterior nasal spine (ANS), posterior nasal spine (PNS), and alveolar bone width showed significant increments (p < 0.05). Changes in the cheek and alar curvature points on both sides significantly correlated with hard tissue changes (p < 0.05).
Conclusions: Maxillary expansion using MSEs resulted in significant lateral and forward movements of the soft tissues of cheek and alar curvature points on both sides in young adults and correlated with the maxillary suture opening at the ANS and PNS.
키워드
Maxillary expansion; Micro-implant-supported maxillary skeletal expander; Soft tissue change
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