Comparação cefalometrica entre as grandezas de avaliação antero-posterior das bases apicais / Cephalometric comparison between the antero-posterior evaluation variables of apical base widths

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The object of this research was to assess the behavior of the ANB angle, the Wits assessment, of AF-BF distance, the USP Projection and the AP-BP distance in leucodermic Brazilian individuals with clinically normal occlusions. An assessment was made of 79 lateral teleradiographs of the head, there being 40 of men and 39 of women, divided into three groups according to the facial type, determined by the values of the FMA and IAF angles, obtained by the ratio between AFP and AFA. The ANB angle presented mean values of 2.62º for women and 2.7º for men, therefore, very close to the normality standards, behaving in a similar manner in the three groups. In the Wits assessment, the mean values for men and for women were 1.49mm and 2.83mm, respectively, therefore differing from the values determined as being standard. With regard to the inter-group comparison, statistically, Group 2 presented the highest means. For the AF-BF distance, a mean of 3.72 mm was established. There was no statistically significant difference among the three skeletal groups studied. The mean values found for the ProjUSP, were -3.55mm for men and -3.62mm for women. In the three studied groups, it was found that the ProjUSP changed according to facial divergence, presenting lower values for Group 2 (-3.16mm) and higher values for Group 1 (-3.78mm). The mean values observed for the distance AP-BP of 3.9mm for women and 4.05mm for men, were found to be within the established normality range. With regard to the division into groups, the mean values observed for the same measurement were 4.12mm, 4.25mm and 3.57mm, for Group 1, 2 and 3 respectively, and it was found that in spite of the influence of facial divergence, all the groups presented values within the normality range of 3 to 7mm. This being so, the results allowed one to conclude that: facial divergence, measured by the variation of the angle FMA and by IAF, had no significant influence on the reading of the values of angle ANB, Wits assessment, distance AF-BF, ProjUSP and distance APBP; and of the five variables used to determine the antero-posterior discrepancy of the bone bases, only the measurements AO-BO and AF-BF presented statistically significant positive correlations. The variable AO-BO presented a significant linear correlation with the variables ANB, AF-BF and ProjUSP, and the distance AF-BF, with the variables ANB, AO-BO and AP-BP

ASSUNTO(S)

ortodontia cephalometry orthodontics diagnosis cefalometria diagnostico

ACESSO AO ARTIGO

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