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The predictability of dentoskeletal factors for soft-tissue chin strain during lip closure / 대한치과교정학회지
The Korean Journal of Orthodontics ; : 279-287, 2013.
Artigo em Inglês | WPRIM | ID: wpr-182528
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.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Modelos Logísticos / Queixo / Classificação / Sobremordida / Incisivo / Lábio / Má Oclusão Tipo de estudo: Estudo prognóstico / Fatores de risco Limite: Feminino / Humanos Idioma: Inglês Revista: The Korean Journal of Orthodontics Ano de publicação: 2013 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Modelos Logísticos / Queixo / Classificação / Sobremordida / Incisivo / Lábio / Má Oclusão Tipo de estudo: Estudo prognóstico / Fatores de risco Limite: Feminino / Humanos Idioma: Inglês Revista: The Korean Journal of Orthodontics Ano de publicação: 2013 Tipo de documento: Artigo