Department of Periodontology and Operative Dentistry, Westphalian Wilhelms-University, Münster, Germany.
Central Interdisciplinary Ambulance in the School of Dentistry, Münster, Germany.
J Endod. 2018 Nov;44(11):1736-1740. doi: 10.1016/j.joen.2018.07.026. Epub 2018 Sep 19.
The aim of this study was to compare the solubility and the change in pH of a tricalcium silicate-containing sealer (BioRoot RCS [BR]), a mineral trioxide aggregate-containing sealer (MTA Fillapex [MTA]), and an epoxy resin-based sealer (AH Plus [AH]) during a longer period of time.
The solubility test was carried out in accordance with ISO6876:2012. Three hundred eighty sealer samples (n = 10 per group) were stored for 6 months in double distilled water (AD) or phosphate-buffered saline (PBS). The solubility was determined on the basis of the mass difference in percent. The pH measurement was carried out on the basis of the experimental setup of the solubility test with the aid of an electrode pH meter. The results were evaluated for significance by using analysis of variance, Student-Newman-Keuls, and t test (P < .05).
The highest solubility was found for MTA in AD (4.65% ± 1.17%), followed by BR in AD (3.88% ± 0.42%) (P < .05). Also in PBS, MTA (3.24% ± 0.7%) showed a higher solubility than BR (1.78% ± 0.5%) (P < .05). AH was virtually insoluble during the entire period (0.5% ± 0.5%) (P < .05). The pH decreased continuously over time for all samples. After 6 months, BR showed the highest pH in AD (pH 10.3), followed by MTA in AD (pH 8.8), BR in PBS (pH 7.5), AH in PBS (pH 7.3), MTA in PBS (pH 7.2), and AH in AD (pH 6.3).
The solubility of MTA was significantly increased compared with BR and AH. Storage in PBS significantly reduced solubility of MTA and BR. BR showed a higher pH in both AD and PBS than MTA in AD and PBS. AH did not cause any significant pH change.
本研究旨在比较一种含硅酸三钙的密封剂（BioRoot RCS [BR]）、一种含三氧化矿物聚合体的密封剂（MTA Fillapex [MTA]）和一种基于环氧树脂的密封剂（AH Plus [AH]）在较长时间内的溶解度和 pH 值变化。
根据 ISO6876:2012 进行溶解度测试。将 380 个密封剂样本（每组 10 个）在双蒸水（AD）或磷酸盐缓冲盐水（PBS）中储存 6 个月。根据质量差的百分比确定溶解度。借助于电极 pH 计，根据溶解度测试的实验设置进行 pH 值测量。使用方差分析、Student-Newman-Keuls 和 t 检验（P <.05）评估结果的显著性。
在 AD 中，MTA 的溶解度最高（4.65% ± 1.17%），其次是 BR（3.88% ± 0.42%）（P <.05）。在 PBS 中，MTA（3.24% ± 0.7%）的溶解度也高于 BR（1.78% ± 0.5%）（P <.05）。在整个研究期间，AH 几乎不溶（0.5% ± 0.5%）（P <.05）。所有样本的 pH 值随时间持续下降。6 个月后，BR 在 AD 中表现出最高的 pH 值（pH 10.3），其次是 AD 中的 MTA（pH 8.8）、PBS 中的 BR（pH 7.5）、PBS 中的 AH（pH 7.3）、PBS 中的 MTA（pH 7.2）和 AD 中的 AH（pH 6.3）。
与 BR 和 AH 相比，MTA 的溶解度显著增加。在 PBS 中储存显著降低了 MTA 和 BR 的溶解度。BR 在 AD 和 PBS 中的 pH 值均高于 AD 和 PBS 中的 MTA。AH 不会引起任何显著的 pH 值变化。
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