Effect of obturation technique with immediate and delayed post space preparation on apical voids and bond strength of apical gutta-percha

Abstract

Objective The purpose of this study was to evaluate the effect of immediate and delayed post space preparation on the sealing ability of two root canal obturation techniques by using micro-computed tomography imaging and a push-out test. Methods The root canals of 40 human maxillary premolar teeth were instrumented and divided into four groups: (A) single cone (SC) followed by immediate post space preparation, (B) continuous wave of condensation (CWC) followed by immediate post space preparation, (C) SC followed by delayed post space preparation, and (D) CWC followed by delayed post space preparation. Micro-CT scans were performed for volumetric analysis of voids and filling materials in the apical 4-mm portion. A push-out test was performed, and failure modes (adhesive, cohesive, or mixed) were assessed. Data were analyzed using the Kruskal-Wallis test and one-way analysis of variance. Results No significant differences were observed among the four groups in terms of the percentage volume of voids of the apical 4 mm or the bond strength of apical gutta-percha. Conclusions The percentage volume of voids and bond strength of apical gutta-percha were similar and were not significantly influenced by the timing of post space preparation or the obturation technique.

Sealing Ability of Mineral Trioxide Aggregate, Biodentine and Glass Ionomer as Root-End Materials: A Question of Choice

“…Complete debridement of the root canals with complex root canal morphology is difficult to obtain, and most previous studies have comprised the evaluation of sealing ability on single root canals (19). Maxillary incisors and canines were selected as they have a simple root canal morphology.…”

Effect of irrigation protocols on root canal wall after post preparation: a micro-CT and microhardness study

“…The effects of PSP on the roots filled using the single-cone technique have been previously evaluated regarding apical displacement and residual filling material. 22,23 The assessment of residual filling material using micro-CT 9,22 provides a three-dimensional view of the root canal without damaging the samples. 9 This assessment made it possible to use the same roots in the microhardness test.…”

Efficacy of prototype endodontic obturators for novel root canal obturation techniques using a resin-based sealer in various powder-liquid ratios

“…Researchers have used several methods to evaluate the sealing ability of the root canal filling materials, such as glucose leakage tests [27], fluid transport methods [28], bacterial leakage tests [29], and dye penetration tests [30]. Image analyses using microcomputed tomography and optical microscopy have also been used for quantitative analyses [31]. In this study, sealing ability was analyzed quantitatively with image analysis software, which is easy and reliable [32].…”