Influence of radiopaque fillers on physicochemical properties of a model epoxy resin-based root canal sealer
Influence of radiopaque fillers on physicochemical properties of a model epoxy resin-based root canal sealer
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DOI：
10.1590/1679-775720130334
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发表时间：
2013-12-01
影响因子：
2.7
通讯作者：
SAMUEL, Susana Maria Werner
中科院分区：
文献类型：
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作者：
COLLARES, Fabricio Mezzomo;KLEIN, Mariana;SAMUEL, Susana Maria Werner
Objective: To verify the influence of radiopaque fillers on an epoxy resin-based sealer.材料和方法：实验密封剂的配制是在环氧树脂基中添加按重量计 20%、40%、60%、80%、100% 和 120% 的钨酸钙、三氟化镱或硫酸钡。 Setting time, flow, film thickness, radiopacity, sorption, solubility, pH and push-out bond strength were evaluated.结果：凝结时间为373～612.66min，流量为13.81±0.49～22.49±0.37mm，膜厚为16.6±5.77～33.33±11.54μm。 The lowest pH was 5.47+/-0.53, and the highest was 6.99+/-0.03. Radiopacity varied from 0.38+/-0.04 to 2.57+/-0.21 nnmAl and increased with the amount of filler. Calcium tungstate sealers had a higher sorption and solubility than other sealers. There was no significant difference in the push-out bond strength among the fillers at the 120% concentration.结论：所评估的无机填料及其浓度影响环氧树脂基根管封闭剂的理化性能。
Objective: To verify the influence of radiopaque fillers on an epoxy resin-based sealer. Material and Methods: Experimental sealers were formulated by adding 20%, 40%, 60%, 80%, 100% and 120% of calcium tungstate, ytterbium trifluoride or barium sulphate by weight to an epoxy-resin-base. Setting time, flow, film thickness, radiopacity, sorption, solubility, pH and push-out bond strength were evaluated. Results: The setting time ranged from 373 to 612.66 min, the flow varied from 13.81+/-0.49 to 22.49+/-0.37 mm, and the film thickness ranged from 16.6+/-5.77 to 33.33+/-11.54 mu m. The lowest pH was 5.47+/-0.53, and the highest was 6.99+/-0.03. Radiopacity varied from 0.38+/-0.04 to 2.57+/-0.21 nnmAl and increased with the amount of filler. Calcium tungstate sealers had a higher sorption and solubility than other sealers. There was no significant difference in the push-out bond strength among the fillers at the 120% concentration. Conclusion: The inorganic fillers evaluated and their concentrations affect the physicochemical properties of an epoxy resin-based root canal sealer.