Microscopic and Chemical Assessments of the Filling Ability in Oval-Shaped Root Canals Using Two Different Carrier-Based Filling Techniques

Abstract

Objectives The aim of this study was to assess the filling ability in oval-shaped canals using two different carrier-based filling techniques. Materials and Methods Twenty-four human mandibular premolars with one oval canal were selected. Canals were shaped using WaveOne Gold Primary and ProGlider. Samples were divided into two groups and filled as follows: Thermafil and GuttaCore. The proportions of gutta-percha-filled areas (GPFAs), sealer-filled areas (SFAs), and void areas (VA), at 2 and 5 mm, were analyzed using optical numeric microscope, scanning electron microscope, and energy-dispersive X-ray. Statistical Analysis Data were compared by Kruskal–Wallis one-way analysis of variance on ranks, with statistical significance set at α = 0.05. Results At 2 and 5 mm distances from the apex, this study discloses no statistically different filling ability for the two techniques. Concerning each sample treated using both filling systems, the presence of tags was visualized. At working length (WL)-5, and WL-2, the maximum tag penetration depth for the GuttaCore group into the dentinal tubules was, respectively, 96 μm and 48 μm, whereas the values in the thermafil group were 109 μm, and 55 μm, respectively. Conclusions Our results clearly show that Thermafil and GuttaCore can fill oval-shaped canals in appropriate way. Furthermore, we can state that the GuttaCore obturator allows to preserve the same filling ability than Thermafil obturator, in view of the fact that there was no difference, in terms of GPFA, SFA, and VA between the two different carrier-based obturation techniques.

Physicochemical and Antibacterial Properties of Novel, Premixed Calcium Silicate-Based Sealer Compared to Powder–Liquid Bioceramic Sealer

“…One more important advantage is its user-friendly and non-time-consuming nature [ 15 ]. A successful endodontic treatment depends on several aspects such as, shaping of the root canal system, cleaning, and a 3D root canal obturation able to provide an optimal coronal seal, reduce apical leakage, and entomb the remaining bacteria [ 24 , 35 ]. As far as we know, there is no information on the filing ability, physical properties, and antibacterial activity of the Ceraseal root canal sealer.…”

“…The penetration of the sealers into the dentinal tubule may represent an important factor to entomb the bacteria [ 24 ] and to favor an interaction between the sealer materials and the dentinal fluid; this may induce the formation of bioactive mineral crystals inside the dentinal tubules [ 40 , 41 ]. The sealers, BR and CS, showed intra-tubular infiltrations (tags) at 5 and 8 mm.…”

“…After debridement of the root surface, specimens were immersed in a 1% NaOCl solution at 4 °C for 24 h and then stored in saline solution [ 24 ]. Teeth were first scanned with cone-beam computed tomography (CBCT) ( Figure 1 ) and selected according to the following morphological parameters: Single canal, Long/short diameter (ratio > 2) at 5–8 mm from the apex [ 25 ], Root curvature (≤20° according to the Schneider method) [ 26 ].…”

“…The working length (WL) was established using a #10 K-file under high magnification by subtracting 0.5 mm from the length at which the tip of the instrument was visible at the apical foramen. Subsequently, the apices were sealed with a cyanoacrylate glue in order to achieve a closed system [ 24 ].…”

In Vitro Evaluation of Different Irrigation Protocols on Intracanal Smear Layer Removal in Teeth with or without Pre-Endodontic Proximal Wall Restoration

“…This study is the first work assessing the influence of pre-endodontic restoration on smear layer removal in the coronal, middle, and apical thirds of the root canal when using different irrigation strategies. In this study, the use of CBCT for the selection of the dental specimens permitted us to reduce the lack of homogeneity among the groups and subgroups [ 19 ]. Moreover, in order to standardize the irrigation procedure, each subgroup was irrigated under identical conditions using the same volume and flow rate.…”