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 U1-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.
| Original language | English |
|---|---|
| Pages (from-to) | 279-287 |
| Number of pages | 9 |
| Journal | Korean Journal of Orthodontics |
| Volume | 43 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2013 Dec 1 |
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Keywords
- Classification and regression tree
- Mentalis
- Soft-tissue chin
ASJC Scopus subject areas
- Orthodontics
Cite this
The predictability of dentoskeletal factors for soft-tissue chin strain during lip closure. / Yu, Yun Hee; Kim, Yae Jin; Lee, Dong-Yul; Lim, Yong Kyu.
In: Korean Journal of Orthodontics, Vol. 43, No. 6, 01.12.2013, p. 279-287.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The predictability of dentoskeletal factors for soft-tissue chin strain during lip closure
AU - Yu, Yun Hee
AU - Kim, Yae Jin
AU - Lee, Dong-Yul
AU - Lim, Yong Kyu
PY - 2013/12/1
Y1 - 2013/12/1
N2 - 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 U1-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.
AB - 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 U1-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.
KW - Classification and regression tree
KW - Mentalis
KW - Soft-tissue chin
UR - http://www.scopus.com/inward/record.url?scp=84890081461&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84890081461&partnerID=8YFLogxK
U2 - 10.4041/kjod.2013.43.6.279
DO - 10.4041/kjod.2013.43.6.279
M3 - Article
VL - 43
SP - 279
EP - 287
JO - Korean Journal of Orthodontics
JF - Korean Journal of Orthodontics
SN - 1225-5610
IS - 6
ER -