Lewandowska Joanna, Opydo-Szymaczek Justyna, Mehr Katarzyna, Głowacki Jakub
Postgraduate Studies in Scientific Research Methodology, Poznan University of Medical Sciences, Poznań, Poland.
Department of Pediatric Dentistry, Poznan University of Medical Sciences, Poznań, Poland.
Acta Bioeng Biomech. 2019;21(4):53-62.
The aim of this cross-sectional research was to quantify left-right dentoalveolar fluctuating (FA) and directional asymmetries (DA) in patients with adolescent idiopathic scoliosis and to assess the relationship between these asymmetries and the side, location, and severity of scoliosis.
The study group comprised of 60 females aged 12-16 years, with idiopathic scoliosis, and 54 healthy controls. Measurements were made with the use of digital caliper on full-mouth dental casts. The following variables were measured from each subject: a shift of the incisor midline, left and right incisor overjet, deviation of canine and buccal segment relation as well as maxillary and mandibular arch chords. The data were statistically analyzed with significance taken as p < 0.05.
Statistically significant differences in the mean shift of the incisor midline, buccal segment relation on the left and canine deviation on the left between the control group and the study group were detected ( p = 0.0419, p = 0.0.458 and p = 0.0204, respectively). FA of the midline deviation and canine deviation were statistically significantly higher for subjects with IS, compared to healthy controls ( p = 0.0315 and p = 0.0415, respectively). Neither direction of the curve nor apical vertebra's location or apical translation significantly affected the magnitude of dentoalveolar asymmetries.
Our results confirmed that bilateral asymmetries are a common feature of the young females' occlusion. Individuals with IS show higher tendency to Angle Class II malocclusion, as well as higher FA of incisor midline discrepancy and canine deviation, compared to the controls.
本横断面研究旨在量化青少年特发性脊柱侧凸患者左右牙牙槽的波动不对称性（FA）和方向不对称性（DA），并评估这些不对称性与脊柱侧凸的侧别、位置及严重程度之间的关系。
研究组包括60名年龄在12至16岁的特发性脊柱侧凸女性患者以及54名健康对照者。使用数字卡尺对全口牙模进行测量。从每个受试者测量以下变量：切牙中线偏移、左右切牙覆盖、尖牙及颊段关系偏差以及上颌和下颌牙弓弦长。数据进行统计学分析，显著性水平设定为p < 0.05。
在对照组和研究组之间，检测到切牙中线平均偏移、左侧颊段关系及左侧尖牙偏差存在统计学显著差异（分别为p = 0.0419、p = 0.0458和p = 0.0204）。与健康对照相比，特发性脊柱侧凸患者中线偏差和尖牙偏差的FA在统计学上显著更高（分别为p = 0.0315和p = 0.0415）。曲线方向、顶椎位置或顶椎移位均未显著影响牙牙槽不对称的程度。
我们的结果证实双侧不对称是年轻女性咬合的常见特征。与对照组相比，特发性脊柱侧凸患者表现出更高的安氏II类错牙合倾向，以及切牙中线差异和尖牙偏差的更高FA。
