Relationship between dental arch width and vertical facial morphology in multiethnic assamese adults

Abstract

Aim: The aim of this study was to evaluate the relationship between dental arch width and vertical facial morphology in the Assamese population and also to investigate the differences in dental arch width dimensions between male and female subjects. Materials and Methods: Ninety untreated adults aged from 18 to 45 years, divided into three test groups, Group-I: MP-SN angle: low 37°. Measurements of Intercanine width, first and second interpremolar width, first intermolar width, tooth-size arch material discrepancy were performed on maxiillary and mandibular cast. Results: The results indicate a high correlation with Pearson's correlation coefficient values (r) from intercanine width to interpremolar width, medium correlation for intermolar width. The relationship was found to be an inverse, as SN-MP angle increased, the dental arch widths decreased. Arch width varies as low SN-MP > average SN-MP > high SN-MP angle. The dental arch widths of males were found to be wider than females. Conclusion: The relationship of dental arch width and vertical facial pattern is determined by the steepness of the mandibular plane in the Assamese adult population. Since dental arch width is associated with gender, vertical facial morphology, and population groups, it is suggested to use individualized archwires according to each patient's pretreatment arch form and widths.