Flury Simon, Peutzfeldt Anne, Lussi Adrian
Department of Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern, Switzerland.
Am J Dent. 2011 Aug;24(4):226-32.
To investigate the surface hardness (Vickers hardness, HVN) of one light-curing flowable resin composite and five dual-curing resin cements after different polymerization procedures.
The HVN was measured with a hardness-indentation device on one light-curing flowable resin composite (Tetric EvoFlow) and five dual-curing resin cements (Panavia F2.0, SpeedCEM, RelyX Unicem Clicker, SmartCem2 and iCEM) after the resin material had been cured at constant 30 degrees C according to one of five polymerization procedures (n = 30/procedure and material): (1) 5-minute light-curing (positive control; prolonged light-curing), (2) 40-second light-curing (immediate light-curing), (3) 6-minute auto-curing (negative control; dual-curing resin cements only), (4) 6-minute auto-curing followed by 40-second light-curing (delayed light-curing), and (5) 5-second light-curing, 1-minute auto-curing and 40-second light-curing (instructions for removal of excess cement). A Kruskal Wallis test followed by pairwise Wilcoxon ranksum tests with Bonferroni-Holm adjustment was applied for each material and procedure (level of significance: alpha = 0.05).
For each material, Procedure 1 showed the significantly highest HVN and Procedure 3 the significantly lowest HVN. Procedure 4 showed significantly increased HVN for each material compared to Procedure 3. With Procedure 1, Panavia F2.0 and RelyX Unicem yielded significantly higher HVN than the other resin materials. With Procedure 3, no significant differences in HVN were found between Panavia F2.0, SpeedCEM and SmartCem2 which all showed significantly higher HVN than RelyX Unicem and iCEM.
研究一种光固化可流动树脂复合材料和五种双固化树脂水门汀在不同聚合程序后的表面硬度（维氏硬度，HVN）。
使用硬度压痕装置测量一种光固化可流动树脂复合材料（Tetric EvoFlow）和五种双固化树脂水门汀（Panavia F2.0、SpeedCEM、RelyX Unicem Clicker、SmartCem2和iCEM）的HVN，树脂材料在30℃恒温下按照五种聚合程序之一固化后进行测量（每种程序和材料n = 30）：（1）5分钟光固化（阳性对照；延长光固化），（2）40秒光固化（即时光固化），（3）6分钟自固化（阴性对照；仅适用于双固化树脂水门汀），（4）6分钟自固化后接着40秒光固化（延迟光固化），以及（5）5秒光固化、1分钟自固化和40秒光固化（去除多余水门汀的说明）。对每种材料和程序应用Kruskal Wallis检验，随后进行经Bonferroni-Holm校正的成对Wilcoxon秩和检验（显著性水平：α = 0.05）。
对于每种材料，程序1显示HVN显著最高，程序3显示HVN显著最低。与程序3相比，程序4显示每种材料的HVN显著增加。采用程序1时，Panavia F2.0和RelyX Unicem产生的HVN显著高于其他树脂材料。采用程序3时，Panavia F2.0、SpeedCEM和SmartCem2之间的HVN无显著差异，它们均显示出显著高于RelyX Unicem和iCEM的HVN。
