Effect of an Organogelator on the Properties of Dental Composites

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• 作者：Elizabeth A. Wilder ; Kristen S. Wilson ; Janet B. Quinn ; Drago Skrtic ; and Joseph M. Antonucci
• 刊名：Chemistry of Materials
• 出版年：2005
• 出版时间：May 31, 2005
• 年：2005
• 卷：17
• 期：11
• 页码：2946 - 2952
• 全文大小：160K
• 年卷期：v.17,no.11(May 31, 2005)
• ISSN：1520-5002

文摘

Bioactive dental composites containing amorphous calcium phosphate have the potential to remineralizecaries lesions and white spots, but their applications are limited by the inherent weakness of calciumphosphate as a filler material. To extend the possible uses of these materials, it is necessary to developstable composites that exhibit strong mechanical properties and sustained ion release. Dibenzylidenesorbitol (DBS) is an organic molecule capable of inducing physical gelation in a variety of organic solvents,monomers, and polymers by forming self-assembled networks. Recent efforts have revealed that DBS iscapable of gelation in a wide variety of dental monomers including an ethoxylated bisphenol Adimethacrylate (EBPADMA). This research was aimed at determining the effect of DBS networks onvinyl conversion, polymerization shrinkage, mechanical properties, and ion release potential of bioactivedental composites consisting of zirconia-modified amorphous calcium phosphate (Zr-ACP) as the primaryfiller phase and EBPADMA as the resin matrix phase. Although DBS had little effect on the vinylconversion of EBPADMA/Zr-ACP composites, it significantly (1) reduced the volumetric shrinkage andassociated shrinkage stress, and (2) increased the biaxial flexural strength and hardness of dry specimens.However, ion release studies suggest that DBS inhibits the release of calcium and phosphate ions.