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Microscopic and chemical evaluation of the filling quality of five obturation techniques in oval-shaped root canals

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Abstract

Objectives

The aim of this study was to assess the filling quality of five obturation techniques in oval-shaped root canals.

Materials and methods

A total of 212 mandibular first molars with one distal oval canal were selected. Distal canals, shaped with WaveOne Gold Primary, were randomly divided in five groups (n = 40) for obturation: continuous wave condensation, GuttaCore, Thermafil, single cone with AH plus, and single cone with BioRoot RCS. The proportions of gutta-percha-filled areas (GPFA), sealer-filled areas (SFA), void areas (VA), and the sealer/gutta tags into dentinal tubules at 4 mm and 2 mm from the apex were analyzed by an optical numeric microscope, SEM, and energy-dispersive X-ray (EDX). Data were then compared by Kruskal-Wallis one-way ANOVA on ranks (α = 0.05).

Results

At 4 mm, a statistically significant higher GPFA and lower SFA were observed in the GuttaCore and Thermafil groups compared with the 3 other groups. A statistically significant lower VA was observed in the continuous wave condensation, GuttaCore, and Thermafil groups than in the two single-cone groups. At 2 mm, there were a statistically significant higher GPFA and lower SFA and VA in GuttaCore and Thermafil groups than in the 3 other groups. At the two levels investigated, the presence of gutta-percha tags was clearly demonstrated for GuttaCore and Thermafil groups; no tags were observed in the 3 other groups.

Conclusions

Obturation quality was overall improved in GuttaCore and Thermafil groups.

Clinical relevance

Carrier-based techniques may significantly improve the filling quality compared to continuous wave condensation and single-cone technique. The single-cone technique might have inherent limitations especially in oval root canals regardless of the sealer used.

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Funding

The work was supported by the Department of Endodontics and conservative dentistry at Faculty of Dental Medicine, Strasbourg, France.

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Authors and Affiliations

  1. Department of Endodontics and Conservative Dentistry, Faculty of Dental Medicine, University of Strasbourg, 67000, Strasbourg, France

    Davide Mancino, Naji Kharouf & Youssef Haïkel

  2. Biomaterials and Bioengineering, INSERM UMR_S 1121, Strasbourg University, 67000, Strasbourg, France

    Davide Mancino, Naji Kharouf & Youssef Haïkel

  3. Department of Endodontics and Restorative Dentistry, Faculty of Dental Medicine, University of Turin, Turin, Italy

    Mauro Cabiddu

  4. CNRS, ISM, Inst Movement Sci, Aix Marseille Université, Marseille, France

    Frédéric Bukiet

  5. Service d’Odontologie, APHM, Hôpital Timone, Marseille, France

    Frédéric Bukiet

Authors
  1. Davide Mancino
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  2. Naji Kharouf
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  3. Mauro Cabiddu
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  4. Frédéric Bukiet
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  5. Youssef Haïkel
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Corresponding author

Correspondence to Frédéric Bukiet.

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Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in this study were in accordance with the ethical standards of the Ethics Committee of Medical Odontology School, and Strasbourg University Hospital (protocol no. 2018-89) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Mancino, D., Kharouf, N., Cabiddu, M. et al. Microscopic and chemical evaluation of the filling quality of five obturation techniques in oval-shaped root canals. Clin Oral Invest 25, 3757–3765 (2021). https://doi.org/10.1007/s00784-020-03703-9

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  • DOI: https://doi.org/10.1007/s00784-020-03703-9

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