Novel amino acid modified zinc polycarboxylates for improved dental cements.
Novel amino acid modified zinc polycarboxylates for improved dental cements.
复制标题
用于改进牙科水泥的新型氨基酸改性聚羧酸锌。
DOI：
10.1016/j.dental.2005.01.008
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Park,Jong-Gu
中科院分区：
文献类型：
--
作者：
Xie,Dong;Faddah,Mona;Park,Jong-Gu
本研究的目的是开发一种新的氨基酸改性的锌/钙聚羧酸盐水泥系统，制定的水泥，并评估其机械strengths.MATERIALS和METHODS丙烯酸酯和甲基丙烯酸酯衍生物的四种氨基酸的合成和表征，使用FT-IR和1HNMR光谱。该衍生物与具有侧基甲基丙烯酸酯基团的聚合物、水一起配制，并且合成新型填料。使用树脂液体的压缩强度（CS）以及弯曲强度（FS）和粘度作为评价制剂和形成的水泥的工具。在测试之前，将用于CS和FS测试的样品在37 ℃的蒸馏水中分别调理24小时和7天。测量的水泥的CS和FS按降序为甲基丙烯酰基β-丙氨酸>丙烯酰基谷氨酸=丙烯酰基β-丙氨酸>甲基丙烯酰基谷氨酸>甲基丙烯酸2-羟乙酯。甲基丙烯酰基β-丙氨酸由于其相对低的溶液粘度和高CS以及FS而被选择用于进一步的制剂。聚合物含量、P/L比、酒石酸和引发剂浓度对反应有显著影响。在老化过程中，水泥表现出持续增加CS长达1个月，然后保持恒定长达3 month.CONCLUSIONSThis研究开发了一种新的氨基酸改性的锌/钙聚羧酸盐水泥系统。与Durelon相比，该系统在CS中高85%，在Durelon中高98%，在FS中高183%。
OBJECTIVEThe objective of this study was to develop a novel amino acid modified zinc/calcium polycarboxylate cement system, formulate the cements, and evaluate their mechanical strengths.MATERIALS AND METHODSAcrylate and methacrylate derivatives of four amino acids were synthesized and characterized using FT-IR and1HNMR spectroscopy. The derivatives were formulated with polymer having pendent methacrylate group, water, and synthesized novel filler. Compressive (CS) as well as flexural strengths (FS) and viscosities of the resin liquids were used as tools to evaluate the formulations and formed cements. The specimens for CS and FS tests were conditioned in distilled water at 37°C for 24h and 7d, respectively, prior to testing.RESULTSThe measured CS and FS of the cements was in the decreasing order of methacryloyl beta-alanine>acryloyl glutamic acid=acryloyl beta-alanine>methacryloyl glutamic acid>2-hydroxyethyl methacrylate. Methacryloyl beta-alanine was selected for further formulations due to its relatively low solution viscosity and high CS as well as FS. Effects of polymer content, P/L ratio, tartaric acid and initiator concentration were significant. During aging, the cement showed a constant increase in CS for up to 1 month and then kept constant for up to 3 months.CONCLUSIONSThis study developed a novel amino acid modified zinc/calcium polycarboxylate cement system. This system was 85% higher in CS, 98% higher in DTS and 183% higher in FS, compared to Durelon.