Polymerization Shrinkage and Stress Development in Amorphous Calcium Phosphate/Urethane Dimethacrylate Polymeric Composites
Polymerization Shrinkage and Stress Development in Amorphous Calcium Phosphate/Urethane Dimethacrylate Polymeric Composites
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DOI：
10.1177/0021998309345180
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发表时间：
2010-02-01
影响因子：
2.9
通讯作者：
Skrtic, D.
中科院分区：
文献类型：
--
作者：
Antonucci, J. M.;Regnault, W. F.;Skrtic, D.
研究了一种新型的高分子量低聚乙二醇扩链聚氨酯二甲基丙烯酸酯（UDMA）（PEG-U）取代光活化UDMA树脂中的甲基丙烯酸羟乙酯（HEMA）对无定形磷酸钙（ACP）复合材料的乙烯基转化率（DC）、聚合收缩率（PS）、应力发展（PSSD）和双轴弯曲强度（BFS）的影响。复合材料由四种类型的树脂（UDMA、PEG-U、UDMA/HEMA和UDMA/PEG-U）和氧化锆杂化ACP制备。引入PEG-U改善了DC，同时对复合材料的PS、PSSD和BFS没有不利影响。DC的这种改善归因于PEG-U的乙烯基之间更长、更灵活的结构以及与聚（HEMA）相比更高的分子量。结果表明，PEG-U有潜力作为替代HEMA在牙科和其他生物医学应用。
This study explores how substituting a new high molecular mass oligomeric poly(ethylene glycol) extended urethane dimethacrylate (UDMA) (PEG-U) for 2-hydroxyethyl methacrylate (HEMA) in photo-activated UDMA resins affects degree of vinyl conversion (DC), polymerization shrinkage (PS), stress development (PSSD) and biaxial flexure strength (BFS) of their amorphous calcium phosphate (ACP) composites. The composites were prepared from four types of resins (UDMA, PEG-U, UDMA/HEMA, and UDMA/PEG-U) and zirconia-hybridized ACP. Introducing PEG-U improved DC, while not adversely affecting PS, PSSD, and the BFS of composites. This improvement in DC is attributed to the long, more flexible structure between the vinyl groups of PEG-U and its higher molecular mass compared to poly(HEMA). The results imply that PEG-U has the potential to serve as an alternative to HEMA in dental and other biomedical applications.