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International Journal of Dentistry
Volume 2012 (2012), Article ID 831508, 6 pages
http://dx.doi.org/10.1155/2012/831508
Clinical Study

In Vivo Disintegration of Four Different Luting Agents

1Department of Prosthetic Dentistry, School of Dentistry, Marmara University, 34726 Istanbul, Turkey
2Department of Reconstructive Sciences, University of Connecticut, Farmington, CT 06030, USA
3School of Dentistry, Creighton University, Omaha, NE 68178, USA
4Department of Orthodontics, School of Dentistry, Marmara University, 34365 Istanbul, Turkey

Received 13 July 2011; Accepted 11 August 2011

Academic Editor: Per-Olof Glantz

Copyright © 2012 Deniz Gemalmaz 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

The purpose of this study was to evaluate the disintegration of luting agents. An intraoral sample holder was made having four holes of 1.4 mm diameter and 2 mm depth. The holder was soldered onto the buccal surface of an orthodontic band, which was cemented to the first upper molar in 12 patients, average age 26 years. The holes were filled with a zinc phosphate (Phosphate Kulzer), a glass ionomer (Ketac Cem), a resin-modified-glass ionomer (Fuji Plus), and a resin cement (Calibra). Impressions were made at baseline, and 6, 12, and 18 months from which epoxy replicas were made, which were scanned with an optical scanner. Total volume loss was calculated. The rank order of mean volume loss was as follows: Phosphate cement > Ketac Cem = Fuji Plus = Calibra. Cement type and time had statistically significant effects on volume loss of cements ( ). Under in vivo conditions, zinc phosphate cement disintegrated the most, whereas no significant difference was observed for glass ionomer and resin-based cements. As intraoral conditions are considerably less aggressive than experimental laboratory conditions, the erosion behavior of glass ionomer cement was found to be similar to the resin-based cements in contradiction to previous laboratory results.