Department of Operative Dentistry, Dental Materials and Endodontics, Dental School of Bauru, University of São Paulo, Bauru, SP, Brazil.
J Endod. 2010 Jun;36(6):1048-51. doi: 10.1016/j.joen.2010.02.007. Epub 2010 Mar 19.
This study evaluated in vitro the radiopacity, setting time, flow, film thickness, solubility, and dimensional changes of AH Plus sealer pure (Dentsply De Trey Gmbh, Konstanz, Germany) and containing 5% and 10% of calcium hydroxide.
The study was performed according to the requirements of the ISO 6876:2001 standard and the American National Standards Institute/American Dental Association (ANSI/ADA)'s Specification No. 57. The following tests were performed: setting time, flow, film thickness, dimensional stability, radiopacity, and solubility. Data were analyzed statistically by analysis of variance and the Tukey tests with a significance level of 5%.
The addition of 5% or 10% calcium hydroxide to AH Plus sealer did not alter significantly the radiopacity or setting time values (p > 0.05). Adding 10% calcium hydroxide reduced the flow compared with pure AH Plus and AH Plus/5% calcium hydroxide. The addition of 5% and 10% calcium hydroxide increased the solubility and expansion of AH Plus. All materials presented expansion valued above those recommended by the ADA. The addition of calcium hydroxide to the sealer resulted in greater film thickness.
The addition of 5% calcium hydroxide did not affect most physical properties of AH Plus sealer.
本研究通过体外实验评估了 AH Plus 密封剂纯品（登士柏迪特瑞有限公司，德国康斯坦茨）和分别含有 5%和 10%氢氧化钙的 AH Plus 密封剂的射线阻射性、凝固时间、流动性、薄膜厚度、溶解性和尺寸变化。
该研究根据 ISO 6876:2001 标准和美国国家标准协会/美国牙科协会（ANSI/ADA）规范 No.57 的要求进行。进行了以下测试：凝固时间、流动性、薄膜厚度、尺寸稳定性、射线阻射性和溶解性。数据通过方差分析和 Tukey 检验进行统计学分析，置信水平为 5%。
向 AH Plus 密封剂中添加 5%或 10%的氢氧化钙不会显著改变射线阻射性或凝固时间值（p>0.05）。与纯 AH Plus 和 AH Plus/5%氢氧化钙相比，添加 10%的氢氧化钙会降低流动性。添加 5%和 10%的氢氧化钙会增加 AH Plus 的溶解性和膨胀性。所有材料的膨胀值均高于 ADA 推荐值。向密封剂中添加氢氧化钙会导致薄膜厚度增加。
向 AH Plus 密封剂中添加 5%的氢氧化钙不会影响其大多数物理性质。
