Análisis Morfológico del Grosor Labial en Individuos Mesofaciales y Braquifaciales en una Población Mexicana / Morphological Analysis of Lip Thickness in Mesofacial and Braquifacial Patients of a Mexican Population

El objetivo fue determinar las diferencias de grosor y proyección labial en hombres y mujeres mesofaciales y braquifaciales mexicanos a través del análisis de Arnett & Bergman. Se evaluaron 120 radiografías laterales de cráneo usando mediciones lineales y angulares de la cefalometría de tejidos blandos. Se evaluaron las dimensiones: plano oclusal, ángulo interincisal, grosor del labio superior e inferior, ángulo nasolabial, gap interlabial, proyección del labio superior e inferior, plano vertical nasion-menton. Para el análisis estadístico se realizó una prueba ANOVA usando el software minitab versión 15 para determinar las diferencias entre los grupos. No se encontraron diferencias estadísticamente significativas en el plano oclusal del incisivo superior e inferior, en el ángulo interincisal, ángulo nasolabial, gap interlabial y proyecciones de labio superior e inferior. Se encontraron diferencias estadísticamente significativas en mujeres: grosor del labio superior (p0,007), grosor del labio inferior (p0,001) y en el plano vertical nasion-menton (p0,001); mientras que para hombres se identificó diferencia significativa en: grosor del labio inferior (p0,033), proyección de labio inferior (p0,039) y en el plano vertical nasion-menton (p0,001). Estas medidas muestran que las diferencias del biotipo facial se identifican en cambios de los tejidos blandos. Existe una diferencia en el grosor de los labios entre los individuos mesofaciales y braquifaciales.

The mean of this study was to determinate the differences between lip thickness and lip projection in mesofacial and brachyfacial patients of a Mexican population using the Arnett & Bergman cephalometric analysis. 120 cephalograms were evaluated using linear and angular measurements of the soft tissue analysis. In this study it was evaluated: occlusal plane with the upper incisive, occlusal plane with the upper incisive, interincisal angle, upper and lower lip thickness, nasolabial angle, interlabial gap, upper and lower lip projection and true vertical plane from nasion-menton. The ANOVA test was performed using Minitab (15 version) statistical analysis software to indicate the differences between the groups. No statistical significance was found in the occlusal plane with the upper and lower incisive, interincisal angle, nasolabial angle, interlabial gap and upper and lower lip projection. Statistical significance was found in women: upper lip thickness (p0.007), lower lip thickness (p0.001) and true vertical plane from nasion-menton (p0.001) and a statistical significance in men: lower lip thickness (p0.033), lower lip projection (p0.039) and true vertical plane from nasion-menton (p0.001). This measurement shows soft tissue differences between the facial growth patterns. A lip thickness difference was found between mesofacial and brachyfacial individuals.

The effect of lip thickness on lip profile change after orthodontically treated patients with 4 first bicuspid extraction / 대한치과교정학회지

After orthodontic treatment, there are several changes in soft tissue profile. Changes appear at lower anterior facial profile area, especially upper and lower lip. But there are many individual variations in the pattern of changes. So, this study was conducted to find out that the basic upper lip thickness could be one of the factors that could influence the treatment results. The samples were composed of 43 adult patients who had their 4 first premolars extracted. Groups were classified by their basic lip thickness. In group 1(thin upper lip group), there was negative relationship between mentolabial angle and lower lip change. In group 2(average lip thickness group), upper lip change was related to upper incisor change, lower incisor change, lower lip change and nasolabial angle change. And lower lip change was related to upper lip change, upper incisor change, lower incisor change. In group 3(thick upper lip group), there was no relation between both lip change and other variables.