School of Dentistry, Federal University of Amazonas-UFAM, Manaus, AM, Brazil.
Int Endod J. 2010 Apr;43(4):283-91. doi: 10.1111/j.1365-2591.2009.01678.x.
To compare a new root canal sealer based on Copaifera multijuga oil-resin (Biosealer) using three other established sealers (Sealer 26, Endofill and AH plus) in terms of their physicochemical properties.
The study was carried out according to the requirements of Specification Number 57 of the American Dental Association (ADA) and consisted of the following tests: setting time, flow, film thickness, dimensional stability, radiopacity and solubility/disintegration. Data were analysed statistically using anova and Tukey's test for multiple comparisons. The significance level was set at 5% for all analyses.
Sealer 26 and AH Plus had the longest setting time (P < 0.05). All materials presented flow in with the ADA's guidelines. Regarding film thickness, Sealer 26 did not have a satisfactory performance, as it had a higher mean value than the maximum allowed by the ADA (0.05 mm), being significantly different from the other materials (P < 0.05), which had mean values for film thickness in accordance with the ADA's recommendations. Regarding the solubility and disintegration, only Endofill did not meet the ADA's specifications and presented the worst results of all materials (P < 0.05). Sealer 26 presented the greatest dimensional changes and differed significantly from all other sealers (P < 0.05). Biosealer had the lowest radiopacity values and was significantly different from the other sealers (P < 0.05).
The experimental sealer based on Copaifera multijuga oil-resin presented satisfactory results in the physicochemical tests required by the ADA.
比较一种基于 Copaifera multijuga 油树脂的新型根管封闭剂（Biosealer）与另外三种已确立的封闭剂（Sealer 26、Endofill 和 AH plus）在理化性能方面的差异。
该研究根据美国牙科协会（ADA）规范 57 号的要求进行，包括以下测试：凝固时间、流动性、薄膜厚度、尺寸稳定性、射线不透性和溶解度/崩解。使用方差分析和 Tukey 多重比较检验对数据进行统计学分析。所有分析的显著性水平均设定为 5%。
Sealer 26 和 AH Plus 的凝固时间最长（P < 0.05）。所有材料的流动性均符合 ADA 指南。关于薄膜厚度，Sealer 26 的性能不理想，其平均值高于 ADA 允许的最大值（0.05mm），与其他材料有显著差异（P < 0.05），这些材料的薄膜厚度平均值符合 ADA 的建议。关于溶解度和崩解性，只有 Endofill 不符合 ADA 的规格，其结果是所有材料中最差的（P < 0.05）。Sealer 26 的尺寸变化最大，与所有其他封闭剂有显著差异（P < 0.05）。Biosealer 的射线不透性值最低，与其他封闭剂有显著差异（P < 0.05）。
基于 Copaifera multijuga 油树脂的实验性封闭剂在 ADA 要求的理化测试中表现出满意的结果。
