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Resumo Introdução e objetivo: a análise do sorriso diante de um tratamento odontológico é imprescindível e deve sempre levar em consideração fatores como: idade do paciente, anomalias de tamanho e forma dos dentes, formato do rosto, lábios, cor, presença de diastemas, desvios de linha média dentária, entre outros. Investigar a possível influência do desvio da linha média superior na atratividade do sorriso em adolescentes. Métodos: foram utilizadas seis fotografias frontais de sorrisos posados de voluntários adolescentes tratados ortodonticamente que apresentavam uma oclusão aparentemente normal e a linha média dentária superior coincidente com a linha média facial e com a inferior. Cada fotografia real foi manipulada com auxílio do Adobe Photoshop 7.0, para obter-se fotografias com desvio de linha média superior de 1 a 4mm, totalizando 30 fotografias. Tais imagens foram analisadas por cirugiões-dentistas, alunos de odontologia e adolescentes leigos, os quais as classificaram levando em consideração a estética do sorriso. Para verificar a atratividade do sorriso foi utilizado a análise de variância (ANOVA) para a avaliação inter e intra-grupos, além da correlação de Pearson. Resultados: os grupos de alunos e cirurgiões-dentistas mostraram correlação negativa entre o desvio da linha media e a atratividade do sorriso (p≤0,05). Foi possível observar que não houve diferença estatisticamente significante na avaliação feita por adolescentes leigos independente do grau de desvio de linha média. Conclusão: desvios de linha média superior prejudicam a atratividade de sorriso quando avaliadas por pessoas que têm conhecimento sobre a área odontológica.
Abstract Introduction and objective: the analysis of the smile in the face of dental treatment is essential and must always take into account factors such as: age of the patient, anomalies in the size and shape of the teeth, face shape, lips, color, presence of diastema, dental midline deviations, between others. To investigate the possible influence of the deviation of the upper midline on the attractiveness of the smile in adolescents. Materials and methods: six frontal photographs in posed smile were selected from orthodontically treated adolescent volunteers who had an apparently normal occlusion and an upper dental midline coincident with facial and lower midline. Each real photograph was manipulated with the aid of Adobe Photoshop 7.0, in order to obtain photographs with an upper midline deviation of 1 to 4mm, totaling 30 photographs. Such images were analyzed by graduated dentists, dentistry students and lay adolescents, who classified them considering the aesthetics of the smile. To check the attractiveness of the smile, analysis of variance (ANOVA) was used for inter and intra-group evaluation, in addition to Pearson's correlation. Results: the groups of students and dentists showed a negative correlation between the deviation from the midline and the attractiveness of the smile (p ≤0.05). It was possible to observe that there was no statistically significant difference in the assessment made by lay adolescents, regardless of the degree of deviation from the midline. Conclusion: deviations from the upper midline impair the smile attractiveness when evaluated by people who are knowledgeable about the dental field.
Resumen Introducción y objetivo: el análisis de la sonrisa de cara al tratamiento odontológico es fundamental y siempre debe tener en cuenta factores como: edad del paciente, anomalías en el tamaño y forma de los dientes, forma de la cara, labios, color, presencia de diastemas, desviaciones de la línea media, entre otros. Investigar la posible influencia de la desviación de la línea media superior en el atractivo de la sonrisa en adolescentes. Materiales y métodos: se utilizaron seis fotografías frontales en sonrisa posada tomadas a adolescentes voluntarios tratados con ortodoncia que tenían oclusión aparentemente normal y línea media dentaria superior coincidente con línea media facial e inferior. Cada fotografía real fue manipulada con la ayuda de Adobe Photoshop 7.0, con el fin de obtener fotografías con una desviación de la línea media superior de 1 a 4 mm, totalizando 30 fotografías. Tales imágenes fueron analizadas por odontólogos graduados, estudiantes de odontología y adolescentes legos, quienes las clasificaron teniendo en cuenta la estética de la sonrisa. Para verificar el atractivo de la sonrisa, se utilizó el análisis de varianza (ANOVA) para la evaluación inter e intra-grupo, además de la correlación de Pearson. Resultados: los grupos de estudiantes y dentistas mostraron una correlación negativa entre la desviación de la línea media y el atractivo de la sonrisa (p ≤0.05). Se pudo observar que no hubo diferencia estadísticamente significativa en la evaluación realizada por los adolescentes legos independientemente del grado de desviación de la línea media. Conclusión: las desviaciones de la línea media superior perjudican el atractivo de la sonrisa cuando son evaluadas por personas que tienen conocimientos sobre el campo dental.
RESUMO
OBJECTIVE: This study was performed to validate the autonomous maximal smile (AMS) as a new reference for evaluating dental and gingival exposure. METHODS: Digital video clips of 100 volunteers showing posed smiles and AMS at different verbal directives were recorded for evaluation a total of three times at 1-week intervals. Lip-teeth relationship width (LTRW) and buccal corridor width (BCW) were measured. LTRW represented the vertical distance between the inferior border of the upper vermilion and the edge of the maxillary central incisors. Intraclass correlation coefficients (ICCs) for reproducibility, and the m-value (minimum number of repeated measurements required for an ICC level over 0.75), were calculated. RESULTS: LTRW and BCW of the AMS were 1.41 and 2.04 mm, respectively, greater than those of the posed smile (p < 0.05), indicating significantly larger dental and gingival exposure in the AMS. The reproducibility of the AMS (0.74 to 0.77) was excellent, and higher than that of the posed smile (0.62 to 0.65), which had fair-to-good reproducibility. Moreover, the m-value of the AMS (0.88 to 1.05) was lower than that of the posed smile (1.59 to 1.85). CONCLUSIONS: Compared to the posed smile, the AMS shows significantly larger LTRW and BCW, with significantly higher reproducibility. The AMS might serve as an adjunctive reference, in addition to the posed smile, in orthodontic and other dentomaxillofacial treatments.
Assuntos
Incisivo , VoluntáriosRESUMO
Objective:To compare the smile characteristics of the subjects with different types of malocclusion.Methods:1 80 sub-jects with classⅠ(n =60),classⅡ(n =60)and class Ⅲ(n =60)malocclusion at the age of 1 8 to 25 years were included.The smile vidioes and posed smile images of the subjects were acquired.Smile quantitative evaluation indexes were measured and analysed.Re-sults:There were statistical differences in smile indexes and the amount of the gingival exposure in classⅡ subjects between the male and female(P classⅠ >classⅢ,smile index of class Ⅲ was greater than that of class Ⅰ and class Ⅱ,the teeth exposure of class Ⅱ was less than that of class Ⅰand class Ⅲ.Conclusion:Malocclusion types may affect smile characteristics.