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Effects of Various Diluents Included in the Resin Matrices on the Characteristics of the Dental Composites  

Yoo, Sun-Hwa (School of Chemical Engineering and Materials Science, Chung-Ang University)
Kim, Chang-Keun (School of Chemical Engineering and Materials Science, Chung-Ang University)
Publication Information
Polymer(Korea) / v.33, no.2, 2009 , pp. 153-157 More about this Journal
Abstract
The resin matrix in the dental composite is generally composed of 2,2-bis[4-(2-hydroxy-3-methacryloyloxy propoxy) phenyl] propane (Bis-GMA) as a base resin and triethylene glycol dimethacrylate (TEGDMA) as a diluent for the reduction of viscosity. The applications of dental composite were often limited in dentistry due to the relatively large amounts of volumetric shrinkage during polymerization and water uptake caused by the addition of TEGDMA to the resin matrix. In this study, in order to solve problems stemmed from the TEGDMA by reducing amount of diluent added to resin matrix, diethylene glycol dimethacrylate (DEGDMA) and ethylene glycol dimethacrylate (EGDMA) were explored as new diluents. A decrease in the volumetric shrinkage and an increase in the mechanical strength were observed by replacing TEGDMA in the dental composite to DEGDMA (or EGDMA). Reduction in the mechanical strength of the dental composite containing DEGDMA (or EGDMA), was not serious in comparison with that of the dental composite containing TEGDMA after water uptake.
Keywords
dental composite; resin matrix; diluent; volumetric shrinkage; water uptake;
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Times Cited By Web Of Science : 0  (Related Records In Web of Science)
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