The influence of age on lip-line cant in adults: a cross-sectional study.
10.4041/kjod.2016.46.2.81
- Author:
Sung Hwan CHOI
1
;
Jung Suk KIM
;
Cheol Soon KIM
;
Chung Ju HWANG
Author Information
1. Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentisrty, Yonsei University, Seoul, Korea. hwang@yuhs.ac
- Publication Type:Original Article
- Keywords:
Adults;
Age;
Lip-line cant;
Menton deviation
- MeSH:
Adult*;
Classification;
Cross-Sectional Studies*;
Humans;
Linear Models;
Male;
Retrospective Studies
- From:The Korean Journal of Orthodontics
2016;46(2):81-86
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: 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. METHODS: 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). RESULTS: 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). CONCLUSIONS: 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.
