title: Microleakage and thermal properties of hybrid ionomer restoratives.
abstract: The objective of this study was to compare the microleakage and thermal properties of two recently introduced hybrid materials to those of a conventional glass-ionomer cement. Class V preparations were prepared at the cementoenamel junctions in freshly extracted bovine incisor and evaluated for microleakage with a 45Ca radioisotope method. Thermal properties were evaluated with thermal mechanical analysis and differential scanning calorimetry. The degree of microleakage and the coefficient of thermal expansion of the conventional glass-ionomer cement were found to be significantly less than those of either hybrid.
authors.affiliation: Department of Restorative Dentistry, University of Mississippi, School of Dentistry, Jackson, USA.
authors.forename: A D
authors.initials: AD
authors.lastname: Puckett
authors.forename: J G
authors.initials: JG
authors.lastname: Fitchie
authors.forename: B
authors.initials: B
authors.lastname: Bennett
authors.forename: J H
authors.initials: JH
authors.lastname: Hembree
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000818:Animals; D002152:Calorimetry, Differential Scanning; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry*; D003763:Dental Leakage; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006358:Hot Temperature; D008298:Maleates / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D018709:Statistics, Nonparametric; D013816:Thermodynamics
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D008298:Maleates; D012117:Resins, Synthetic; C081982:VariGlass VLC; C040964:Ketac-Fil