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International Journal of Dentistry
Volume 2011, Article ID 583521, 8 pages
http://dx.doi.org/10.1155/2011/583521
Research Article

In Vitro Properties of Orthodontic Adhesives with Fluoride or Amorphous Calcium Phosphate

1Markham Orthodontic Specialty, 3000 Highway 7 E Suite 208, Markham, ON, Canada L3R 6E1
2University of Illinois at Chicago, 801 S. Paulina Street MC841, Chicago, IL 60612-7211, USA

Received 9 March 2011; Revised 26 April 2011; Accepted 5 June 2011

Academic Editor: Alexandre Rezende Vieira

Copyright © 2011 Clara Ka Wai Chow et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This in vitro study evaluated the efficacy of orthodontic adhesives with fluoride or amorphous calcium phosphate (ACP) in reducing bacterial adhesion and enamel demineralization. Forty human premolars each sectioned buccolingually into three parts were bracketed with control resin (Transbond XT) or adhesives containing ACP (Aegis Ortho) or fluoride (QuickCure). Artificial lesions induced by pH cycling were examined by X-ray photoelectron spectrophotometry (XPS) and polarized light microscopy (PLM). After 28 days, Aegis Ortho demonstrated the lowest calcium and phosphorous content by XPS analysis. After 42 days, reductions in lesion depth areas were 23.6% for Quick Cure and 20.3% for Aegis Ortho ( ). In the presence of 1% sucrose, adhesion of Streptococcus mutans to Aegis Ortho and Quick Cure was reduced by 41.8% and 37.7% ( ) as compared to Transbond XT. Composites containing ACP or fluoride reduced bacterial adherence and lesion formation as compared to a composite without ACP or fluoride.