O'Donnell J N R, Antonucci J M, Skrtic D
American Dental Association Foundation, National Institute of Standards and Technology, 100 Bureau Drive Stop 8546, Gaithersburg, MD, USA 20899.
J Compos Mater. 2008 Jan 1;42(21):2231-2246. doi: 10.1177/0021998308094797.
Water sorption (WS), mechanical strength, and ion release of polymeric composites formulated with 40 % as-made or milled amorphous calcium phosphate (ACP) are compared after 1, 2 and 3 months of aqueous exposure. Ethoxylated bisphenol A dimethacrylate, triethylene glycol dimethacrylate, 2-hydroxyethyl methacrylate and methacryloxyethyl phthalate comprised the resin. The WS (mass %) peaked at 3 months. WS of as-made ACP composites was significantly higher than WS of milled ACP composites and copolymers. Both composite groups experienced decreases in biaxial flexural strength (BFS) with water aging, with milled ACP composites retaining a significantly higher BFS throughout immersion. Ion release was moderately reduced in milled ACP composites, though they remained superior to as-made ACP composites due to significantly lower WS and higher BFS after prolonged aqueous exposure.
对含有40%原样或研磨无定形磷酸钙（ACP）的聚合物复合材料在水暴露1、2和3个月后的吸水率（WS）、机械强度和离子释放进行了比较。树脂由乙氧基化双酚A二甲基丙烯酸酯、三甘醇二甲基丙烯酸酯、甲基丙烯酸2-羟乙酯和甲基丙烯酰氧基乙基邻苯二甲酸酯组成。吸水率（质量%）在3个月时达到峰值。原样ACP复合材料的吸水率显著高于研磨后ACP复合材料和共聚物的吸水率。随着水老化，两个复合材料组的双轴弯曲强度（BFS）均下降，研磨后ACP复合材料在整个浸泡过程中保持显著更高的双轴弯曲强度。研磨后ACP复合材料的离子释放适度降低，不过由于长时间水暴露后吸水率显著更低且双轴弯曲强度更高，它们仍优于原样ACP复合材料。
