Abstract
Abstract Dental materials should be stable over time. This study investigated volumetric change of the root canal sealers AH Plus, Fill Canal, and Sealapex; and the root-end filling materials Biodentine, IRM, and MTA after different periods of immersion in distilled water. Resin models were manufactured with cavities 3 mm deep. The cavities were filled with the materials and scanned by microcomputed tomography after setting, and after 7 and 30 days immersed in distilled water. Percentages of volumetric changes after 7 and 30 days of immersion were compared by t-test. ANOVA/Tukey tests were used to compare endodontic materials (5% significance level). All root canal sealers had an increase in their volumetric change after 30 days. Among root-end filling materials, only IRM showed difference between the periods. Biodentine showed more volumetric changes than MTA, but both materials kept their volume from 7 to 30 days. In conclusion, the immersion period of endodontic materials may affect their stability.
Highlights
Dental materials should be investigated regarding their properties[1,2]
Standardized tests are defined by the American Dental Association (ADA)[3] and International Organization for Standardization (ISO)[4] for solubility and dimensional change analyses of root canal sealers[5]
ISO/ADA standards are recommended for assessing root canal sealers, there is no specification for root-end filling materials
Summary
Dental materials should be investigated regarding their properties[1,2]. Standardized tests are defined by the American Dental Association (ADA)[3] and International Organization for Standardization (ISO)[4] for solubility and dimensional change analyses of root canal sealers[5]. A previous study[13] showed that root canal sealers based on calcium silicate or salicylate resin showed high solubility during 6 months of evaluation This assessment over time shows that some materials could not be stable[14], which may compromise the sealing[7]. Some studies have been evaluated materials after 30 days[8,10], no comparison was performed between volumetric changes in the two periods of immersion in distilled water This comparison between periods using micro-CT can demonstrate the volumetric stability of repair materials or endodontic sealers based on different compositions after different periods of immersion in distilled water, reflecting its behavior in relation to volumetric stability over time. The aim of this study was to compare by using micro-CT the volumetric stability of different endodontic cements and root canal sealers after 7 and 30 days of immersion in distilled water. The null hypothesis was that there is no effect of immersion time in distilled water on the volumetric change of the materials
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