Polymerisation shrinkage of luting agents for crown and bridge cementation.
Polymerisation shrinkage of luting agents for crown and bridge cementation.
复制标题
冠桥粘固剂的聚合收缩。
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
A. Walls
中科院分区：
文献类型：
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作者：
S. Osman;J. Mccabe;A. Walls
各种粘结剂的体积收缩，包括Panavia 21、All-Bond C&B水泥、Superbond. Variolink和磷酸锌骨水泥进行评估，并使用最小传感器进行比较。测试材料之间的收缩是由放置在4个硅橡胶垫片上的偏转盖玻片的凝胶后线性位移确定的，混合材料位于垫片之间的中心。最后，研究了所有材料从刚性收缩时刻起60分钟内的收缩率和收缩持续时间，并比较了测试材料之间的最终收缩值。方差分析表明，材料之间存在极显著差异（P< 0.001），各组的平均值与其他任何组的平均值均存在显著差异（Tukey检验）。Superbond的最终聚合收缩率最高，其次分别是All bond C&B、Variolink、Panavia 21和磷酸锌粘固粉。此外，有一个显着的变化，在整体幅度的收缩（从1.34%至4.62%）之间的材料测试。在本研究中用于测量聚合收缩率的方法被证明是一种精确的测量方法，因为它产生了一致和可重现的结果。它还可以提供在后凝胶化阶段期间观察一系列化学固化树脂材料的聚合收缩随时间的发展的能力。
The volumetric contraction of a variety of luting agents, including Panavia 21, All-Bond C&B Cement, Superbond., Variolink and zinc phosphate cement, was assessed and compared using a minimal transducer The contraction among the materials tested was determined from the post-gel linear displacement of a deflecting coverslip resting on 4 silicone rubber spacers between which a mixed material was centrally located. Finally, the rate and duration of shrinkage over a period of 60 minutes from the moment of rigid contraction for all materials were investigated, and the final shrinkage values among the materials tested were compared. The analysis of variance showed that there were highly significant differences (P< 0.001) between the materials and the mean of each group was significantly different from that of any of the other groups (Tukey's test). Superbond produced the highest values of the final polymerisation shrinkage, followed by All bond C&B, Variolink, Panavia 21 and zinc phosphate cement respectively. Also, there was a marked variation in the overall magnitude of shrinkage (from 1.34% to 4.62%) among the materials tested. The method used to measure the polymerisation shrinkage in the present study was shown to be a precise measure in that it produced consistent and reproducible results. It can also offer the ability to observe the development of polymerisation shrinkage against time, during the post-gelation phase, for a range of chemically-cured resin materials.