Water sorption and colour stability of composites containing the antibacterial monomer MDPB
Water sorption and colour stability of composites containing the antibacterial monomer MDPB
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DOI：
10.1016/s0300-5712(98)00006-2
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发表时间：
1999-05-01
影响因子：
4.4
通讯作者：
Ebisu, S
中科院分区：
文献类型：
--
作者：
Imazato, S;Tarumi, H;Ebisu, S
目的：此前，我们报道了含有新开发的抗菌单体甲基丙烯酰氧基十二烷基溴化吡啶（MDPB）的复合材料可抑制细菌生长和菌斑在其表面积聚，而不释放抗菌成分，并且即使在潮湿环境中长期老化后抗菌效果也不会丧失。本研究的目的是研究MDPB的掺入对Bis-GMA基复合材料的吸水特性和颜色稳定性的影响。方法：制备含有0.4％或0.5％MDPB的复合材料的固化盘状样品，并测定吸水率、扩散系数和水的表面接触角。将含 MDPB 的复合材料在 37°C 和 60°C 的水中浸泡 4 周后评价其变色情况，并与不含 MDPB 的对照复合材料进行比较。结果：对照和含 MDPB 的复合材料在吸水率、扩散系数和接触角方面没有显着差异。虽然含有 MDPB 的复合材料在保持在 37°C 时比对照显示出更大的变色，但在 60°C 的水中浸泡 4 周后没有发现任何差异。结论：掺入少量抗菌单体 MDPB 对吸水特性没有影响，并且对 Bis-GMA 基复合材料的颜色稳定性有一点影响，导致快速变色 (C) 1999 Elsevier Science Ltd。保留所有权利。
Objectives: Previously, we have reported that composites incorporating the newly developed antibacterial monomer methacryloyloxydodecylpyridinium bromide (MDPB) inhibited bacterial growth and plaque accumulation on their surfaces without releasing antibacterial components, and that the antibacterial effect was not lost even after ageing in a wet environment for a long period. The purpose of this study was to investigate the influence of the incorporation of MDPB on the water sorption characteristic and colour stability of Bis-GMA based composites.Methods: Cured disc-shaped specimens of composites containing 0.4% or 0.5% MDPB were fabricated, and water uptake, the diffusion coefficient and the surface contact angle for water were determined. Discoloration of MDPB-containing composites was evaluated after immersion in water at 37 degrees C and 60 degrees C for 4 weeks and compared with that of the control composite without MDPB.Results: There were no significant differences in water uptake, diffusion coefficient and contact angle between the control and MDPB-containing composites. Although composites incorporating MDPB showed greater discoloration than the control when maintained at 37 degrees C, no difference was found after 4 weeks of immersion in water at 60 degrees C.Conclusions: Incorporation of small amounts of the antibacterial monomer MDPB showed no influence on the water sorption characteristic and affected a little the colour stability of the Bis-GMA based composite, causing rapid discoloration (C) 1999 Elsevier Science Ltd. All rights reserved.