대한치과교정학회지 (The korean journal of orthodontics)

  • 제43권6호
  • /
  • Pages.279-287
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  • 2013
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  • 2234-7518(pISSN)
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  • 2005-372X(eISSN)
대한치과교정학회 (The Korean Association Of Orthodontists)
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The predictability of dentoskeletal factors for soft-tissue chin strain during lip closure

  • Yu, Yun-Hee (Department of Orthodontics, Graduate School of Clinical Dentistry, Korea University) ;
  • Kim, Yae-Jin (Department of Orthodontics, Graduate School of Clinical Dentistry, Korea University) ;
  • Lee, Dong-Yul (Department of Orthodontics, Graduate School of Clinical Dentistry, Korea University) ;
  • Lim, Yong-Kyu (Department of Orthodontics, Graduate School of Clinical Dentistry, Korea University)
  • 투고 : 2012.11.20
  • 심사 : 2013.05.27
  • 발행 : 2013.12.25
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초록

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.

키워드

참고문헌

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피인용 문헌

  1. Testing a better method of predicting postsurgery soft tissue response in Class II patients: A prospective study and validity assessment vol.85, pp.4, 2015, https://doi.org/10.2319/052514-370.1
  2. Orthodontic incisor retraction caused changes in the soft tissue chin area: a retrospective study vol.20, pp.None, 2020, https://doi.org/10.1186/s12903-020-01099-2