The predictability of dentoskeletal factors for soft-tissue chin strain during lip closure
- Authors
- Yu, Yun-Hee; Kim, Yae-Jin; Lee, Dong-Yul; Lim, Yong-Kyu
- Issue Date
- Dec-2013
- Publisher
- KOREAN ASSOC ORTHODONTISTS
- Keywords
- Soft-tissue chin; Mentalis; Classification and regression tree
- Citation
- KOREAN JOURNAL OF ORTHODONTICS, v.43, no.6, pp 279 - 287
- Pages
- 9
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- KOREAN JOURNAL OF ORTHODONTICS
- Volume
- 43
- Number
- 6
- Start Page
- 279
- End Page
- 287
- URI
- https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/30410
- DOI
- 10.4041/kjod.2013.43.6.279
- ISSN
- 2234-7518
2005-372X
- Abstract
- Objective: To investigate the dentoskeletal factors which may predict soft-tissue chin strain during lip closure. Methods: The pretreatment frontal and lateral facial photographs and lateral cephalograms of 209 women (aged 18-30 years) with Angle's Class I or II malocclusion were examined. The subjects were categorized by three examiners into the no-strain and strain groups according to the soft-tissue chin tension or deformation during lip closure. Relationships of the cephalometric measurements with the group classification were analyzed by logistic regression analysis, and a classification and regression tree (CART) model was used to define the predictive variables for the group classification. Results: The lower the value of the overbite depth indicator (ODI) and the higher the values of upper incisor to Nasion-Pogonion (U1-NPog, mm), overjet, and upper incisor to upper lip (U1-upper lip, mm), the more likely was the subject to be classified into the strain group. The CART showed that 1.11-NPog was the most prominent predictor of soft-tissue chin strain (cut-off value of 14.2 mm), followed by overjet. Conclusions: To minimize strain of the soft-tissue chin, orthodontic treatment should be oriented toward increasing the ODI value while decreasing the U1-NPog, overjet, and U1 upper lip values.
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- Appears in
Collections - 3. Graduate School > Graduate School of Clinical Dentistry > 1. Journal Articles
- 2. Clinical Science > Department of Orthodontics > 1. Journal Articles
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