Evaluation of the sealing ability of different root canal sealers: a combined SEM and micro-CT study

Abstract

ObjectiveThe purpose of this study was to analyze the ability of multiple compounds to seal the dental tubules using scanning electron microscopy (SEM) and micro-computed tomogra-phy (micro-CT).Material and MethodsTwenty-four single-root human mandibular premolars were selected and instrumented with nickel-titanium rotary file and the final file size was #40/06. They were then randomly allocated into 2 groups, and all samples were filled with single cone gutta-percha (#40/06) and one of the tested sealers (AH Plus and EndoSequence BC sealers). All specimens were scanned using micro-CT and then three from each group were randomly selected for SEM analysis.ResultsAccording to SEM, both root canal sealers showed sufficient adaptation to dentin along the whole length of the root canal, though the coronal sections presented superior sealing than the apical sections. Micro porosity analyses revealed that the volume of closed pores and the surface of closed pores had the largest values in the coronal sections, followed by the middle and the apical sections for both sealants (p<0.05). However, no significant difference was observed for those two parameters between AH Plus and EndoSequence BC sealers in any of the three sections (p>0.05), whereas they were larger in the apical section when the AH Plus sealer was used.ConclusionsBy using the single cone technique, neither EndoSequence or AH Plus pro-vides a porosity-free root canal filling. The EndoSequence BC sealer may have similar sealing abilities regarding the whole root canal as the AH Plus sealer. A better sealing effect could be obtained in the coronal and middle sections of a root canal than the apical part by using the tested sealers.

Effect of immersion in distilled water or phosphate‐buffered saline on the solubility, volumetric change and presence of voids within new calcium silicate‐based root canal sealers

“…Although the image resolution allowed voids to be segmented and quantified, smaller pixel sizes improve image quality and detection of voids (Huang et al . , , Kim et al . , Orhan et al .…”

“…Micro‐CT is a highly accurate, nondestructive tool for measuring voids (Huang et al . , Kim et al . ).…”

“…In addition to low solubility, endodontic materials should not have a high percentage of voids (Gandolfi et al 2016), since the presence of voids may increase post-treatment apical periodontitis (Bas ßer Can et al 2017). Hence, the current study also investigated the presence of voids using micro-CT. Micro-CT is a highly accurate, nondestructive tool for measuring voids (Huang et al 2018, Kim et al 2018. A low percentage of voids was detected for the materials.…”

Presence of voids after warm vertical compaction and single‐cone obturation in band‐shaped isthmuses using micro‐computed tomography: A phantom study

“…These challenges have been reported to result in voids within the canal filling and in the interface between filling and dentine (Gillen et al, ). The homogeneity of the obturation material has been assessed by the calculation of voids present within fillings performed with different materials or techniques using micro‐computed tomography (micro‐CT), which is a nondestructive method to visualize inner anatomy of teeth and canal fillings (Çelikten et al, ; Huang et al, ; Keleş et al, ; Kim, Kim, Park, Jung, & Shin, ).…”

Tempo de endurecimento dos cimentos endodônticos: análise dos métodos convencionais e proposta de novo método de avaliação, por meio de ultrassom

“…Vale destacar, que o tempo de endurecimento é uma propriedade importante para que haja tempo de trabalho adequado e consistência correta para permitir o completo preenchimento do sistema de canais radiculares (MASSI et al, 2011). Além disso, mantém relação fundamental com a etapa de obturação dos canais radiculares e restauração final do dente tratado (HUANG et al, 2018), uma vez que, naqueles dentes em que há grande destruição coronária, procedimentos restauradores que incluem pinos intra-radiculares podem ser eleitos, e, para que isso seja possível, necessário se faz que o cimento esteja totalmente endurecido, para que se evitem problemas tais como a desobturação parcial do conduto e prejuízo na adesão do pino intra-radicular à dentina (ALEISA et al, 2016;CAMPOS et al, 2018;VILAS-BOAS et al, 2018).…”