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The influence of smear layer in lateral channels filling

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Abstract

This in vitro study evaluated the ability of a warm gutta-percha obturation system Thermafil to fill lateral channels in presence/absence of smear layer. Forty single-rooted extracted human teeth were randomly divided into two groups for which different irrigation regimens were used: group A, 5 ml of 5% NaOCl + 2.5 ml of 3.6% H2O2; group B, 5 ml of 5% NaOCl 5% + 2.5 ml of 17% ethylenediamine tetraacetic acid. A conventional crown-down preparation technique was employed. Obturation was performed using epoxy resin-based cement (AH Plus) and a warm gutta-percha plastic carrier system (Thermafil). Specimens were cleared in methyl salicylate and analyzed under a stereomicroscope to evaluate the number, length, and diameter of lateral channels. Lateral channels were identified in both groups at medium and apical thirds. Additional samples were prepared for scanning electron microscopy inspection to confirm the presence of smear layer in group A, and the absence of smear layer in group B. All lateral channels resulted filled in both groups. No statistically significant differences regarding number, length, and diameter were observed between the two groups. Smear layer did not prevent the sealing of lateral channels.

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Acknowledgments

This study was supported by grant ex 60% and Progetti Pluriennali–Department of Dental Science of University of Bologna. The authors thank Dr. Silvia Marchionni for technical support and assistance in editing the figures.

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Authors and Affiliations

  1. Endodontics Unit, Department of Oral Sciences, University of Bologna, via San Vitale 59, 40125, Bologna, Italy

    Angelica Bertacci, Chiara Baroni, Mauro Venturi & Carlo Prati

  2. UCO of Dental Sciences, University of Trieste, Trieste, Italy

    Lorenzo Breschi

Authors
  1. Angelica Bertacci
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  2. Chiara Baroni
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  3. Lorenzo Breschi
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  4. Mauro Venturi
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  5. Carlo Prati
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Correspondence to Angelica Bertacci.

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Bertacci, A., Baroni, C., Breschi, L. et al. The influence of smear layer in lateral channels filling. Clin Oral Invest 11, 353–359 (2007). https://doi.org/10.1007/s00784-007-0127-y

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  • DOI: https://doi.org/10.1007/s00784-007-0127-y

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