Relationships between shape and proportion of the maxillary central incisor with facial measurements, dental and facial midline in adults [Relaciones de forma y proporción del incisivo central maxilar con medidas faciales, línea mediana dentaria y facial en adultos]
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The purpose of this study was to relate the shape and proportion of the right maxillary central incisor with facial shape and location of dental and facial median lines. Cross-sectional study on a convenience sample consisting of 118 patients of both sexes was performed, with an average age of 25.09±7.71 years, selected according to inclusion criteria. In each case, were measured the length and width of right maxillary central incisor, tooth ratio resulting of these measures and medium tooth lines in relation to the midline. These measures were correlated with measures of facial shape and facial class. The results revealed that the most common tooth shape found was ovoid; average length and width for the maxillary central incisor were 10.28±0.91 mm and 8.69±0.57 mm, respectively; of 9.98 mm and 8.55 mm in women, and 10.62 mm and 8.86 mm in men. The dental proportion was 85%. Matches between the median lines of maxillary teeth, jaw and face were only found in 18% of cases, and the most common types of gingival contours were aesthetic (97%). There was no relationship between dental and facial for different facial types (analysis of variance and multiple comparison tests of Scheffe) measures, however, we found that all facial classes in both sexes, prevailed mesofacial and class I facial types (57%). Unable to establish a correlation between tooth shape and facial shape significantly, so other parameters should also be taken into account. © 2014, Universidad de la Frontera. All rights reserved.
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