ABSTRACT
Introducción: La maloclusión dental se refiere al incorrecto alineamiento de los dientes o a la forma en que los dientes superiores e inferiores encajan entre sí y, dada su prevalencia, hoy día se considera un problema de salud pública. Objetivo: Evaluar las dimensiones transversales de la arcada, la profundidad y la distancia anteroposterior en el maxilar superior, en las maloclusiones de clases I y II. Métodos: Se midió la distancia intercanina, interpremolar, intermolar, anteroposterior y profundidad del paladar en 100 modelos de estudio de dentición permanente. Se utilizó el compás de Korkahaus, el programa Microsoft Excel y la prueba t de Student. Resultados: Solo se encontraron diferencias estadísticas significativas en las dimensiones transversales y la arcada más estrecha fue en la maloclusión de clase II. Conclusión: La maloclusión de clase I presentó la arcada más amplia, la clase II tiene mayor profundidad del paladar y la distancia anteroposterior en caninos y primeros premolares fue mayor en esta última y en los segundos premolares y molares en la de clase I
Introduction: dental malocclusion refers to the incorrect alignment of the teeth or the form in which the upper and lower teeth fit together and, given its prevalence, nowadays it is considered a public health problem. Objective: to evaluate the transverse dimensions of the dental arch, the depth and the anteroposterior distance in the maxillary bone, in the classes I and II malocclusions. Methods: the intercanine, interpremolar, intermolar, anteroposterior distance and depth of the palate in 100 models of permanent teething study. The Korkahaus compass, the Microsoft Excel program and the Student´s t test were used. Results: there were significant statistical differences only in the traverse dimensions and the narrowest dental arch was in the class II malocclusion. Conclusion: class I malocclusion presented the widest dental arch, class II has higher depth of the palate and the anteroposterior distance in canine teeth and first bicuspid teeth was higher in the latter and in the second buccal teeth in class I
Subject(s)
Humans , Male , Female , Dental Arch , Malocclusion, Angle Class I , Malocclusion, Angle Class II , Orthodontics , Taste , Modalities, SensorialABSTRACT
Our previous principal component analysis conducting on reference points, lines and angles, and a vectordeveloped polar coordinate system has elucidated that the components of eigenvectors had positive relationships in the curvature of anterior teeth segment, between the protrusion of canines and degree of arch roundness, and in the length-to-width ratio of 62 maxillary dentitions, which were preliminarily classified with reference to the conventional Thompson's morphological descriptions for dental arch forms. In the present study on morphological characters of the maxillary dentitions, we conducted a Fourier analysis on the previously obtained data. We observed that the amplitude of 2nd, 3rd and 4th Fourier harmonics were closely correlated with the length-to-width ratio, curvature of the anterior teeth segment, and the curvilinear contour of maxillary dental arches. In addition, the relationships between previously estimated data and the constant value and the amplitude of the Fourier series were examined by analysis of correlation coefficients (p<0.01). The results of the present study suggest that the morphology of maxillary dentitions consists of three essentials-the length-to-width ratio, the curvature of anterior teeth and the curvilinear contour of dental arches.