Dissolution, dislocation and dimensional changes of endodontic sealers after a solubility challenge: a micro‐CT approach

Abstract

Although the solubility of both sealers was similar using this novel micro-CT approach, MTA Fillapex was associated with significant dimensional changes related to material extrusion through the apex after PBS storage compared to AH Plus.

Push-out Bond Strength of Injectable Pozzolan-based Root Canal Sealer

“…The present result is in accordance with several previous studies in which AH Plus was also associated with significantly higher bond strength values when compared with other sealers (19)(20)(21)(22)(23). The superior bond strength property of AH Plus may be largely attributed to the capacity of Basic Research-Technology producing a covalent bond by mixing diepoxide compounds and polyamine paste during its manipulation so that each amine group in the collagen network reacts with an open epoxide ring, resulting in a heavily cross-linked polymer that is rigid and strong (24,25). In addition, low polymerization stress, long-term dimensional stability, and efficient cohesion between molecules had already been reported to increase root dentin micro retention of AH Plus (19,20,24).…”

“…Although MTA Fillapex is an MTA-based sealer, the particle size and composition of several types of MTA differ. MTA Fillapex contains higher amounts of resins and less than 20% MTA particles, which may be an insufficient proportion to demonstrate the full biological and sealing characteristics of this cement (25,33). Furthermore, MTA Fillapex has bismuth oxide as the radiopacifier, which is associated with increase in deterioration of mechanical strength, porosity, and material degradation, which was mostly replaced by zirconium oxide in EndoSeal (13,34).…”

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

“…According to this methodology, solubility and dimensional changes can be evaluated by the same experiment (Silva et al . ). Moreover, micro‐CT allows longitudinal follow‐up of the samples (Neves et al .…”

“…It is also important to consider that calcium silicate-based materials can have both solubility and fluid absorption at the same time (Viapiana et al 2014). When solubility is evaluated volumetrically, based on digital image analysis by micro-computed tomography (micro-CT), solubility and dimensional changes can be evaluated by the same test (Silva et al 2017). Although TotalFill BC had high solubility when evaluated according to conventional tests, this material had volumetric stability in the micro-CT assessment (Tanomaru-Filho et al 2017).…”

Avaliação da citotoxicidade de dois cimentos à base de MTA: um estudo in vitro

“…Este cimento endodôntico também possui um tempo de presa prolongado e, por isso, pode se solubilizar no meio, possivelmente liberando estes componentes citotóxicos já citados, como as resinas de sua composição, mecanismo que também pode contribuir para as baixas taxas de viabilidade celular constatadas neste experimento. 9,[18][19][20] O Endoseal é um material obturador ainda pouco estudado na Endodontia. 14,16,17 Ele também possui MTA em sua composição, assim como o MTA Fillapex.…”