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Lookup NU author(s): Dr Sharanbir Sidhu, Professor John McCabe
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This study investigated the effects of environmental temperature on the fluoride release and recharging ability of glass ionomers. Five disk specimens (15 mm in diameter and 1 mm thick) were made of each of the following materials: a conventional luting glass ionomer, two high viscosity restorative glass ionomers and a restorative resin-modified glass ionomer. The fluoride release of each material was measured at 4°C, 37°C and 55°C. An additional three groups, which were made of the same materials, were stored in distilled and deionized water for 30 days and recharged in 250 ppm fluoride solution at 4°C, 37°C and 55°C for five minutes. The fluoride rerelease was measured daily from two days prior to two days after the recharging process. At all temperatures, the luting glass ionomers showed the greatest fluoride release and recharging ability, followed by the resin-modified glass ionomer, then the high viscosity glass ionomers. For each material, the fluoride release increased with increasing temperature and all glass ionomers showed greater recharging ability at higher temperatures. An increase in environmental temperature increased both the fluoride release and recharging of the glass ionomers. This may be important in developing regimes for improving the delivery of topical fluoride products. © Operative Dentistry, 2007.
Author(s): Yan Z, Sidhu SK, Mahmoud GA, Carrick TE, McCabe JF
Publication type: Article
Publication status: Published
Journal: Operative Dentistry
Year: 2007
Volume: 32
Issue: 2
Pages: 138-143
Print publication date: 01/03/2007
ISSN (print): 0361-7734
ISSN (electronic): 1559-2863
Publisher: Operative Dentistry
URL: http://dx.doi.org/10.2341/06-36
DOI: 10.2341/06-36
PubMed id: 17427822
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