An Evaluation of the Properties of Fluoride-Based and Amorphous Calcium Phosphate-Based Orthodontic Adhesives

Abstract

During the course of this study, fluoride or amorphous calcium phosphate was used as orthodontic adhesives in order to reduce the adhesion of bacteria and the demineralization of enamel in vitro. ACP or fluoride adhesives were used for bracketing three buccolingual sections of forty human premolar teeth. A polarized light microscope and X-ray photoelectron spectrophotometry were used to study artificial lesions caused by pH cycling. Analyzing calcium and phosphorus content by XPS, Aegis Ortho was found to have the lowest content after 28 days. Quick Cure reduced lesion depth areas by 23.6% after 42 days, while Aegis Ortho reduced them by 20.3% (P <0.05). Transbond XT was more resistant to Streptococcus mutans adhesion than Aegis Ortho or Quick Cure in the presence of 1% sucrose (P  0.05). As compared with composites without fluoride or ACP, composites with fluoride or ACP reduce bacterial adhesion and lesion formation.