Efectos de la expansión ortodóncica sobre el perímetro de arcada

Abstract

Introduction. The maxillary expansion is one of the therapeutic procedures most used in orthodontics, due to the fact that not only it concerns the transverse dimension, but the deficient growth of the upper jaw can express in three planes of the space. Numerous authors have analyzed the effects to transverse level of the maxillary expansion in the perimeter of arcade, without obtaining conclusive results. Aims. This work of investigation will study the relation that exists between the maxillary expansion and the profit of arch perimeter, that is to say, will investigate what profit of real space,to align the teeth, obtains with the expansion, independently of the used device and of the quantity of expansion that be necessary to realize. Material and Method. There have been selected 50 patients of both sexes by maxillary compression and that have been submitted to orthodontic treatment by means of maxillary expansion. There were obtained models of stucco of the patients before and after being treated and linear measures were realized to value the changes for the maxillary dental arches. Results. A significant correlation exists between both measures and that, in average, for every millimeter of expansion that is gained, increases approximately 0,65 mm of perimeter of arcade (slope = 0,644). In addition, it would exist arranged as 1,349 that reflects a hypothetical increase of 1,35 mm. Of arranged to the beginning of the expansion. Conclusions. For every millimeter of expansion added, it will be gained 2/3 in the perimeter of arcade and in addition they are the expansion to canine level and premolar those who more influence the profit of perimeter of arcade.