Quality of different gutta-percha techniques when filling experimental internal resorptive cavities: A micro-computed tomography study

Abstract

The purpose of this ex vivo study was to determine the quality of root fillings in experimental internal resorptive cavities filled using cold lateral condensation (CLC), vertical condensation and Thermafil techniques. Forty-five extracted maxillary canine teeth were selected. After root canal instrumentation, the roots were sectioned horizontally and experimental internal resorption cavities were prepared. The root sections were re-approximated with a luting agent and randomly assigned to three groups (n = 15) to be filled using CLC, vertical condensation and Thermafil, respectively. Assessment of obturation quality in the internal resorptive cavity was performed using a desktop X-ray micro focus computed tomography scanner, and the percentage of gutta-percha (GP), sealer and voiding was calculated for each specimen. Data were statistically analysed using non-parametric tests, with P < 0.05 denoting a statistically significant difference. Vertical condensation filled 96.25 ± 8.31% of the total artificial cavity, and was superior to CLC (63.20 ± 16.87%) and Thermafil (59.26 ± 18.47%). The mean percentage of voids was 3.75 ± 8.31% in the vertical condensation group, 37.09 ± 17.13% in the CLC group and 41.06 ± 18.60% in the Thermafil group. We conclude that obturation of experimental resorption cavities is significantly better when using vertical condensation than when using other GP-based techniques.

Influence of Root Canal Filling Techniques on Sealer Penetration and Bond Strength to Dentin

“…This process may have favored the penetration of the sealer into the dentin. Heating the filling material provides a volumetric increase in gutta-percha and a lower percentage of empty spaces than the lateral condensation technique (17). However, this technique resulted in intermediate bond strength to the root canal wall, which can be explained by the fact that heating altered the chemical (18) and morphological (19) composition of the AH Plus sealer and accelerated its polymerization (20), consequently decreasing its chemical interaction time with the dentin.…”

Comparative evaluation of root canal preparations of maxillary first molars with self‐adjusting file, reciproc single file, and revo‐s rotary file: A micro‐computed tomography study

“…This methodology is objective way for quantitative evaluation of root canal anatomy, root canal instrumentation, obturation, and retreatment. Therefore, m-CT was used in this study as in most recent studies (Peters et al, 2010;Paque and Peters, 2011;You et al, 2011;Liu et al, 2013;Keles et al, 2014;Simsek et al, 2014).…”

Effectiveness of five instruments when removing calcium hydroxide paste from simulated internal root resorption cavities in extracted maxillary central incisors

“…Thus, it is important to study the methods by which irrigant agitation can reach all the walls of the IRR cavities and promote the removal of granulation tissue (Patel et al , Topçuoğlu et al ). The use of calcium hydroxide [Ca(OH) 2 ] paste medication is necessary in these cases (Thomas et al , Topçuoğlu et al ); however, despite its many advantages, the presence of this residual material on the walls of the root canal can disrupt the adhesion of endodontic sealers (Keles et al ) and promote treatment failure (Ricucci & Langeland ).…”