Quality of obturation achieved by an endodontic core-carrier system with crosslinked gutta-percha carrier in single-rooted canals

Abstract

Objectives The present study examined the quality of obturation in root canals obturated by GuttaCore, a gutta-percha-based core-carrier system with a cross-linked thermoset gutta-percha carrier, by comparing the incidence of gaps and voids identified from similar canals obturated by cold lateral compaction or warm vertical compaction. Methods Thirty single-rooted premolars with oval-shaped canals were shaped and cleaned, and obturated with one of the three obturation techniques (N=10): GuttaCore, warm vertical compaction or cold lateral compaction. Filled canals were scanned with micro-computed tomography (micro-CT); reconstructed images were analysed for the volumetric percentage of gaps and voids at 3 canal levels (0-4 mm, 4-8 mm and 8-12 mm from working length). The roots were subsequently sectioned at the 4-mm, 8-mm and 12-mm levels for analyses of the percentage of interfacial gaps, and area percentage of interfacial and intracanal voids, using scanning electron microscopy (SEM) to examine negative replicas of root sections. Data were analysed with parametric or non-parametric statistical methods at α=0.05. Results Both micro-CT and SEM data indicated that canals obturated with GuttaCore core-carriers had the lowest incidence of interfacial gaps and voids, although the results were not significantly different from canals obturated by warm vertical compaction. Both the GuttaCore and the warm vertical compaction groups, in turn, had significantly lower incidences of gaps and voids than the cold lateral compaction group. Conclusions Because of the similarity in obturation quality between GuttaCore and warm vertical compaction, practitioners may find the GuttaCore core-carrier technique a valuable alternative for obturation of oval-shaped canals.

Efficacy of the ProTaper retreatment system in removing Thermafil, GuttaCore or vertically compacted gutta‐percha from curved root canals assessed by micro‐CT

“…This difference might be related to the filling technique as compaction of warm gutta‐percha or cross‐linked gutta‐percha core‐carrier systems resulted in a significantly greater percentage of gutta‐percha filled areas and fewer voids than cold lateral compaction (Li et al . , Schäfer et al . ), thus resulting in a less effective removal of thermoplasticized gutta‐percha.…”

“…Retreatment of curved roots filled with laterally compacted guttapercha with Hedstr€ om files, Reciproc, ProTaper Retreatment or D-RaCe resulted in 3.7-11.3% residual filling material (R€ odig et al 2012, 2014). This difference might be related to the filling technique as compaction of warm gutta-percha or cross-linked gutta-percha core-carrier systems resulted in a significantly greater percentage of gutta-percha filled areas and fewer voids than cold lateral compaction (Li et al 2014, Sch€ afer et al 2016, thus resulting in a less effective removal of thermoplasticized gutta-percha. Retreatment of oval root canals with ProTaper Retreatment files filled using the continuous wave of condensation technique resulted in more remaining filling material than root canals filled with cold laterally compacted gutta-percha (Ma et al 2012).…”

Micro-CT assessment of the sealing ability of three root canal filling techniques

“…Several studies have evaluated root canal filling quality for various obturation techniques, using scanning electron microscopy, µ-CT, and confocal laser scanning microscopy (13,(22)(23)(24)(25)(26). Marciano et al (22) used confocal laser scanning microscopy to compare four techniques (SC, LC, system B, Thermafil).…”

“…Li et al (26) used µ-CT to investigate three obturation techniques used in conjunction with ThermaSeal Plus sealer. The roots were divided into three regions (0-4, 4-8, and 8-12 mm).…”

Avaliação qualitativa e quantitativa da instrumentação e obturação de canais radiculares achatados utilizando-se microtomografia computadorizada

“…Neste estudo foi utilizada a µCT para avaliar as mudanças geométricas do canal radicular após a instrumentação com três diferentes movimentos e a qualidade da obturação com duas diferentes técnicas. A introdução da microtomografia (µCT) na endodontia permitiu a análise de todas as etapas do tratamento endodôntico de maneira muito mais detalhada, tridimensionalmente, sem destruição do espécime e com a vantagem de gerar um banco de dados para análises e comparações futuras (Rhodes, 1999;Wasselink, 2001;Barbizam et al, 2002;Rödig et al, 2002;Weiger et al, 2002;Wu et al, 2003;Ruttermann et al, 2007;ElAyouti et al, 2008;Somma et al, 2008;Rubino, 2012;Li et al, 2014). Nas últimas décadas o preparo do canal já foi avaliado de diferentes maneiras, algumas limitações destes métodos são superadas pela µCT.…”