Limit Flow Etchant Applicator

White spot lesions (WSLs) have been reported to occur in a majority of orthodontic patients who undergo multibracket appliance treatment. WSL scores are proven to be higher in total-etch techniques as compared to partial etching, with no difference in bond strengths. It is thus very important to prevent unnecessary etching and demineralization of enamel in those areas where it is not needed and to etch only the surface intended for bracket bonding. This article describes a simple method to limit the flow of the acid etchant to the area on the tooth surface receiving the bracket, with the added advantage of a positioning gauge on the etchant applicator.