Filling quality of several obturation techniques in the presence of apically separated instruments: A Micro-CT study

Turker S. A. , UZUNOĞLU ÖZYÜREK E., Kasikci S., Ondes M., GENECİ F., ÇELİK H. H.

MICROSCOPY RESEARCH AND TECHNIQUE, vol.84, no.6, pp.1265-1271, 2021 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 84 Issue: 6
  • Publication Date: 2021
  • Doi Number: 10.1002/jemt.23685
  • Journal Indexes: Science Citation Index Expanded, Scopus, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, CAB Abstracts, Communication Abstracts, EMBASE, MEDLINE, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Page Numbers: pp.1265-1271
  • Keywords: broken instrument, filling quality, micro&#8208, computed tomography, tooth&#8208, root filling, COLD LATERAL CONDENSATION, GUTTA-PERCHA, CURRENT CHALLENGES, ROOT FILLINGS, SEALER, SYSTEMS, PENETRATION, FRACTURE, IMPACT, AREA


Separated root canal instruments may affect the quality of root canal obturation and hence the survival of endodontically treated teeth. Obturation techniques may influence filling-quality. The aim was to evaluate the obturation quality of teeth filled with different obturation techniques in the presence of apically separated instruments using micro-computed tomography (mu-CT). Notched ProTaper F2 rotary-files were separated in the apical third of 36-human mandibular incisors with single root/canal and mature apex. Samples were filled by an endodontist according to one of the following obturation techniques (n = 12): cold lateral-compaction (CLC), single-cone (SC) and thermoplastic injection (TI). Samples were scanned by the Skyscan 1,274 (R) mu-CT device after 1-week at 37 degrees C in 100% humidity. Images of the sections were evaluated with CTan software in terms of total-volume and volume percentage of the filling materials and voids between coronal end of the separated instrument and gutta-percha/sealer filled void-free sections. Data was analyzed using Kruskal-Wallis and Mann Whitney-U tests with a significance level of 5%. Kruskal-Wallis revealed differences among groups (p < 0.05).Pairwise comparisons revealed that less volume of voids were measured in SC (0.02 +/- 0.03 mm(3)) compared to CLC (0.15 +/- 0.16 mm(3)) and TI (0.18 +/- 0.24 mm(3)) (p < 0.05); while TI was statistically similar with CLC (p > 0.05). Percentages of volumes of voids and filling materials were as follows for SC, CLC and TI, respectively: 8.88 +/- 18.52% and 24.45 +/- 38.40%, 46.92 +/- 33.53% and 53.07 +/- 33.53%, 40.54 +/- 33.85% and 42.79 +/- 34.45%. The obturation technique may have a significant impact on the volume of voids in the presence of a separated file. No obturation technique produced a void-free root canal filling.