Choi Sung Hwan, Kim Jung Suk, Kim Cheol Soon, Hwang Chung Ju
Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentisrty, Yonsei University, Seoul, Korea.
Private Practice, Seongnam, Korea.
Korean J Orthod. 2016 Mar;46(2):81-6. doi: 10.4041/kjod.2016.46.2.81. Epub 2016 Mar 18.
The aims of this study were to assess the direction and degree of lip-line cant in Korean adult orthodontic patients and to identify the effects of sex and age on changes in the cant severity.
In this cross-sectional retrospective study, lip-line cant was measured in the frontal photographs of 585 Korean patients (92 men and 493 women) aged 18-48 years. The outcome variables (direction and degree of lip-line cant) were assessed in terms of predictor variables (sex, age, sagittal skeletal relationship, and menton deviation angle).
The direction of lip-line cant did not differ according to sex, age, or skeletal classification. Patients had 1.6° of lip-line cant on average before orthodontic treatment. Middle-aged adults displayed a significant trend toward a lower degree of lip-line cant compared to younger adults (p < 0.01). Multiple linear regression analysis showed that the degree of lip-line cant was weakly negatively correlated with age (p < 0.001).
While the direction of lip-line cant did not differ according to the parameters explored here, the degree of cant was correlated with age in adults, independent of menton deviation. Specifically, middle-aged adults tended to display significantly lower degrees of lip-line cant than did younger adults.
本研究旨在评估韩国成年正畸患者唇线倾斜的方向和程度，并确定性别和年龄对倾斜严重程度变化的影响。
在这项横断面回顾性研究中，对585名年龄在18至48岁之间的韩国患者（92名男性和493名女性）的正面照片进行唇线倾斜测量。根据预测变量（性别、年龄、矢状面骨骼关系和颏点偏斜角）评估结果变量（唇线倾斜的方向和程度）。
唇线倾斜的方向在性别、年龄或骨骼分类方面没有差异。正畸治疗前患者的唇线平均倾斜度为1.6°。与年轻成年人相比，中年成年人的唇线倾斜度有显著降低的趋势（p < 0.01）。多元线性回归分析表明，唇线倾斜度与年龄呈弱负相关（p < 0.001）。
虽然唇线倾斜的方向根据此处探讨的参数没有差异，但倾斜程度与成年人的年龄相关，与颏点偏斜无关。具体而言，中年成年人的唇线倾斜度往往明显低于年轻成年人。
