Effect of Different Dimensions of Test Samples on the Volumetric Change Assessment Of Endodontic Materials

Abstract

New methodologies using micro-CT to evaluate solubility besides dimensional and morphological changes of endodontic materials are proposed. However, there is no standardization in the methods. The aim of this study was to assess the effect of different dimensions of test samples on volumetric change evaluation of different endodontic materials. AH Plus, FillCanal and Sealapex root canal sealers, Biodentine, IRM and MTA root-end filling cements were used in the tests. Samples of each material with a thickness of 1.5 mm and different diameters were manufactured: 6.3, 7.75, and 9.0 mm. The samples were scanned in micro-computed tomography (micro-CT) after setting and after 7 days of immersion in distilled water. The volumetric change was evaluated by means of the difference in the total volume of the specimens before and after immersion. Data were submitted to ANOVA and Tukey tests (p<0.05). The size of the samples did not affect the percentage of volumetric change of the materials (p>0.05). All sample sizes had greater volume loss for Sealapex among the sealers and Biodentine for the cements (p<0.05). In conclusion, Biodentine and Sealapex had the highest volume loss after immersion. Samples with 1.5 mm thickness, and diameters ranging between 6.3 and 9.0 mm can be used to assess the stability of endodontic materials using micro-CT without affecting the percentage of volumetric change.

Influência da solução de imersão e da interação com a dentina na solubilidade de cimentos endodônticos biocerâmicos pronto para uso ou pó-líquido

“…Teste convencional de solubilidade é realizado pela avaliação da alteração de massa, após imersão em água destilada por 24h. No entanto, períodos maiores de avaliação são empregados para observar o comportamento dos materiais ao longo do tempo (Urban et al, 2018;Silva et al, 2021;Torres et al, 2021), uma vez que o processo de hidratação de cimentos biocerâmicos ocorre mesmo após o tempo de presa final (Siboni et al, 2017). No presente estudo, NSF apresentou menor solubilidade que BR em água destilada (modelos de polietileno) ou PBS (modelos de dentina) após o período de 14 dias.…”