curing 方案对双固化树脂水门汀聚合的影响。
Effect of curing protocol on the polymerization of dual-cured resin cements.
机构信息
Centro de Química Estrutural, IST (Instituto Superior Técnico), Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal.
出版信息
Dent Mater. 2010 Jul;26(7):710-8. doi: 10.1016/j.dental.2010.03.016. Epub 2010 Apr 9.
OBJECTIVES
The purpose of this study was to evaluate how curing protocol affects the extent of polymerization of dual-cured resin cements.
METHODS
Four commercial resin cements were used (DuoLink, Panavia F 2.0, Variolink II and Enforce). The extent of polymerization of the resin cements cured under different conditions was measured using a (1)H Stray-Field MRI method, which also enabled to probe molecular mobility in the kHz frequency range.
RESULTS
Resin cements show well distinct behaviours concerning chemical cure. Immediate photo-activation appears to be the best choice for higher filler loaded resin cements (Panavia F 2.0 and Variolink). A photo-activation delay (5 min) did not induce any significant difference in the extent of polymerization of all cements.
SIGNIFICANCE
The extent of polymerization of dual-cured resin cements considerably changed among products under various curing protocols. Clinicians should optimize the materials choice taking into account the curing characteristics of the cements.
目的
本研究旨在评估固化方案如何影响双固化树脂水门汀的聚合程度。
方法
使用四种商业树脂水门汀（DuoLink、Panavia F 2.0、Variolink II 和 Enforce）。使用（1）H stray-field MRI 方法测量不同条件下固化的树脂水门汀的聚合程度，该方法还能够探测 kHz 频率范围内的分子迁移率。
结果
树脂水门汀在化学固化方面表现出明显的差异。即时光激活似乎是高填料负载树脂水门汀（Panavia F 2.0 和 Variolink）的最佳选择。光激活延迟（5 分钟）不会引起所有水门汀聚合程度的任何显著差异。
意义
不同固化方案下，双固化树脂水门汀的聚合程度在产品间有很大变化。临床医生应根据水门汀的固化特性优化材料选择。
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