Torres Fernanda Ferrari Esteves, Guerreiro-Tanomaru Juliane Maria, Bosso-Martelo Roberta, Espir Camila Galletti, Camilleri Josette, Tanomaru-Filho Mario
Department of Restorative Dentistry, School of Dentistry, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil.
Department of Dentistry, School of Dentistry, UFBA - Universidade Federal da Bahia, Salvador, BA, Brazil.
Braz Dent J. 2019 Jul 22;30(4):368-373. doi: 10.1590/0103-6440201902607.
The aim of this study was to evaluate physical properties of endodontic sealers (AH Plus, MTA Fillapex and Endofill), by conventional and micro-CT tests. Dimensional stability was evaluated after immersion of materials in distilled water for 30 days. Solubility and volumetric change were evaluated after 7 and 30 days of immersion in distilled water. Solubility was evaluated by means of mass loss and volumetric change was assessed by micro-CT. Porosity was evaluated under a microscope after 7 days of immersion in distilled water, and by using micro-CT after setting and immersion in distilled water for 7 and 30 days. Statistical analysis was performed by ANOVA and Tukey's test with 5% significance level. MTA Fillapex presented the highest solubility (p<0.05), showing values above the ISO/ADA recommendations. MTA Fillapex presented higher volumetric and dimensional changes, followed by Endofill and AH Plus (p<0.05). Dimensional stability of the MTA Fillapex and AH Plus did not follow ISO/ADA standards. The highest total porosity was observed for MTA Fillapex (p<0.05). Endofill had higher total porosity than AH Plus according to microscope evaluation (p<0,05), and both sealers were similar in micro-CT assessment (p>0,05). In conclusion, MTA Fillapex presented higher solubility, dimensional and volumetric change besides porosity compared to the other evaluated sealers. The assessed physical properties of sealers are related, and the different tests provided complementary data. Micro-CT is a valuable method for assessment of physical properties of endodontic materials.
本研究的目的是通过传统测试和显微CT测试评估根管封闭剂（AH Plus、MTA Fillapex和Endofill）的物理性能。将材料浸泡在蒸馏水中30天后评估尺寸稳定性。在蒸馏水中浸泡7天和30天后评估溶解性和体积变化。通过质量损失评估溶解性，通过显微CT评估体积变化。将材料浸泡在蒸馏水中7天后，在显微镜下评估孔隙率，并在凝固后以及在蒸馏水中浸泡7天和30天后使用显微CT评估孔隙率。采用方差分析和Tukey检验进行统计分析，显著性水平为5%。MTA Fillapex的溶解性最高（p<0.05），其数值高于ISO/ADA推荐值。MTA Fillapex的体积和尺寸变化更大，其次是Endofill和AH Plus（p<0.05）。MTA Fillapex和AH Plus的尺寸稳定性不符合ISO/ADA标准。观察到MTA Fillapex的总孔隙率最高（p<0.05）。根据显微镜评估，Endofill的总孔隙率高于AH Plus（p<0.05），并且在显微CT评估中两种封闭剂相似（p>0.05）。总之，与其他评估的封闭剂相比，MTA Fillapex除孔隙率外，还表现出更高的溶解性、尺寸和体积变化。封闭剂的评估物理性能是相关的，不同的测试提供了互补的数据。显微CT是评估根管材料物理性能的一种有价值的方法。
