Modification of Transpalatal Arch for Expansion

Abstract

Arch constriction is primarily corrected with either slow or rapid maxillary expansion procedures based on the nature of expansion desired. Clinical studies have suggested that slow expansion maintains sutural integrity during expansion, producing a more stable result than rapid maxillary expansion. Transpalatal arch (TPA) is a commonly used appliance for anchorage in maxillary arch and for controlling the position of molars. In this present article, we have described a simple modification of the commonly used TPA that can also function as a slow maxillary expansion appliance.