Masuoka Naoya, Momoi Yutaka, Ariji Yoshiko, Nawa Hiroyuki, Muramatsu Atsushi, Goto Shigemi, Ariji Eiichiro
Department of Orthodontics, Aichi-Gakuin University School of Dentistry, Nagoya, Aichi, Japan.
Angle Orthod. 2005 Jul;75(4):651-5. doi: 10.1043/0003-3219(2005)75[651:CCIASE]2.0.CO;2.
The purpose of this study was to investigate the relationship between the subjective evaluation of facial asymmetry and seven cephalometric indices. Ten orthodontists subjectively evaluated the frontal photographs of 100 subjects and categorized them into three categories, ie, category I--symmetrical view; category II--a little asymmetry not requiring treatment; and category III--marked asymmetry requiring treatment. Seven indices that were used to evaluate facial asymmetry were determined using frontal cephalographs of these patients. Interobserver agreement was assessed using Cohen's kappa statistic. Agreement among the observers for category III was higher than for categories I and II. To define the characteristics of each category, the cephalometric indices, which at least eight observers agreed on, were compared between the categories. No differences were found in any of the indices between categories I and II. Five indices showed differences between category III and the other categories. Among them, the distance of Me from the vertical reference line was the most relevant index for the subjective evaluation of facial asymmetry. When a discrepancy is found between skeletal measurements and a subjective evaluation, the influence of soft tissue structures should be considered in facial asymmetry.
本研究的目的是调查面部不对称主观评价与七个头影测量指标之间的关系。十位正畸医生对100名受试者的正面照片进行主观评价，并将其分为三类，即第一类——对称外观；第二类——轻微不对称，无需治疗；第三类——明显不对称，需要治疗。使用这些患者的正面头颅侧位片确定用于评估面部不对称的七个指标。采用Cohen's kappa统计量评估观察者间的一致性。观察者对第三类的一致性高于第一类和第二类。为了定义每一类别的特征，比较了至少八位观察者一致认可的头影测量指标在不同类别之间的差异。第一类和第二类在任何指标上均未发现差异。五个指标在第三类与其他类别之间存在差异。其中，Me点到垂直参考线的距离是面部不对称主观评价中最相关的指标。当骨骼测量与主观评价之间存在差异时，在面部不对称中应考虑软组织结构的影响。
