Evaluation of flow and filling of root canal sealers using different methodologies

Abstract

Introduction Flow and filling ability of root canal sealers are indispensable for hermetic sealing of the root canal. Micro-computed tomography (micro-CT) can be used as a complementary methodology to evaluate such properties. Objective To evaluate the flow and filling ability of AH Plus, Endofill and Sealapex by conventional methodology and micro-CT. Material and method The flow of the sealers was analyzed according to ISO 6876/2012 and complemented by the area evaluation. Glass plates were manufactured with diameters of 1×1×2 mm and 1×1×1 mm (length, width and height), with a central cavity and four grooves in the horizontal and vertical directions. Each material was placed in the central cavity. Another glass plate and a metal weight were placed on the cement and kept for 10 minutes. The glass plate/sealer set was scanned using micro-CT. The flow was calculated by linear measurement of the material in the grooves. The central filling (mm3) was calculated in the central cavity and the lateral filling was measured up to 2 mm from the central cavity. Data were submitted to ANOVA/Tukey tests (α=0.05). Result All evaluated sealers presented flow according to ISO 6876 standards. The materials showed central cavity filling capacity higher than 80% and lateral filling greater than 75%. There was no difference in flow (mm and mm2) and in the filling ability (mm3) provided by the materials (p>0.05). Conclusion All evaluated root canal sealers showed adequate flow and filling capacity, suggesting their clinical application.

Physicochemical properties of methacrylate resin, calcium hydroxide, calcium silicate, and silicon-based root canal sealers

“…Flow of the sealer is important to allow the material to penetrate the canal irregularities and accessory canals for better adhesion at sealer-dentine interface [12]. In the present study, Sealapex showed significantly lower flow value (p < 0.05) than the other test materials, which was in line with findings of previous studies [27,28]. All the sealer materials evaluated in the current study showed an acceptable flow (minimum 17 mm) as per ISO standard [11].…”

Effect of Calcium Hydroxide Nanoparticles Incorporation on the Physical Properties of Root Canal Sealer. (In Vitro Study)

“…39 Most of root canal sealers produce some degree of toxicity until completely set 40 and a longer setting time could be related to increased solubility. 41 In the present study, the sealer did not meet the time required for the sealer to set for the ISO specification, nor as recommended by the manufacturer which is 24 Group II showing the least setting time recorded is probably due to the decrease in particle size, which increased the reactivity of the materials allowing the material to set in a shorter period of time. [14][15] Caicedo and von Fraunhofer (1988) 6 stated that sealapex presented prolonged setting time which maybe attributed to the continuous reaction during setting in high humidity, it was accompanied by expansion and caused the material to be fragile.…”