The aim of this research was to examine marginal adaptation of three root end filling materials mineral trioxide aggregate (MTA), Biodentine and amalgam. Ninety single-rooted extracted human teeth of the maxillary intercanine sector were used in the study. After the endodontic treatment and retrograde preparation, teeth were divided into three groups, depending on the root-end filling material. Teeth were cut in longitudinal manner. Measurements of the total width of the marginal gap in micrometers were performed using scanning electron microscopy. The results showed that MTA and Biodentine have better marginal adaptation compared to amalgam expressed through the mean value of the measured edge crack, however without significant difference (p > .05). Mean value of the measured edge crack in Group 1 (MTA) was 8.17 μm, in Group 2 (Biodentine) 8.53 μm, and in Group 3 (amalgam) 9.13 μm. All tested materials show a satisfactory degree of marginal adaptation, but MTA and Biodentine proved to be superior to amalgam.

中文翻译：

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三氧化矿物骨料、硅酸三钙粘固剂和牙科用汞合金作为牙根端填充材料的边缘适应性的扫描电镜分析

本研究的目的是检查三种根端填充材料三氧化二矿物质 (MTA)、Biodentine 和汞合金的边缘适应性。研究中使用了 90 颗上颌尖牙区的单根拔除人类牙齿。经过牙髓治疗和逆行准备后，根据根端充填材料的不同，将牙齿分为三组。牙齿以纵向方式切割。使用扫描电子显微镜测量以微米为单位的边缘间隙的总宽度。结果表明，MTA 和 Biodentine 与通过测量边缘裂纹的平均值表示的汞齐相比具有更好的边缘适应性，但没有显着差异（p > .05）。第 1 组 (MTA) 中测量的边缘裂纹的平均值为 8.17 μm，第 2 组（Biodentine）为 8.53 μm，第 3 组（汞合金）为 9.13 μm。所有测试的材料都显示出令人满意的边缘适应性，但 MTA 和 Biodentine 被证明优于汞合金。