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Efficacy of a thermally treated single file compared with rotary systems in endodontic retreatment of curved canals: a micro-CT study

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Abstract

Objectives

This study aimed to compare WaveOne Gold with ProTaper and RaCe systems regarding remaining filling material, apical transportation (AT), and working time (WT) after (i) filling removal and (ii) shaping of curved canals.

Methods

Thirty mesiobuccal canals of maxillary molars were prepared and filled. After 30 days, they were randomly assigned into three groups (n = 10), according to the instruments used for filling removal and shaping, respectively: WOG—WaveOne Gold Primary and Medium; PTG—ProTaper Retreatment and ProTaper Next; RCG—D-RaCe and RaCe. Micro-CT analysis assessed the residual filling material and AT. WT was recorded. Data were statistically analyzed (α = .05).

Results

There was no significant difference between groups in the amount of filling material at any evaluated moment (P > .05). All groups presented low AT values. The WT was similar in all groups in filling removal (P > .05), and in shaping step WOG was faster than PTG and RCG (P < .05).

Conclusions

Neither system could completely remove the filling material. The instruments evaluated were safe and the reciprocating system was faster than the rotary systems in shaping the canals.

Clinical relevance

This study provided consistent information on filling material removal capacity of WaveOne Gold. Considering that all tested systems were safe, WaveOne Gold may be an alternative with cost-effectiveness and shorter learning curve for endodontic retreatment.

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Acknowledgments

The authors would like to thank Dr. Thiago Gomes da Silva and Laboratório de Análise de Minerais e Rochas (LAMIR) of the Federal University of Paraná for granting permission for micro-CT analysis. The authors deny any conflict of interest.

Funding

This study was conducted at the School of Dentistry, Federal University of Rio Grande do Sul, and at the Laboratório de Análise de Minerais e Rochas (LAMIR), Federal University of Paraná. The authors (Débora Delai, Alexander Pompermayer Jardine, Letícia Boldrin Mestieri, and Daiana Boijink) received funding from Coordenação de Aperfeiçoamento de Pessoal de Ensino Superior (CAPES) agency, Brazil.

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Author notes

  1. Débora Delai and Alexander Pompermayer Jardine contributed equally to this work.

Authors and Affiliations

  1. Graduate Program of the School of Dentstry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil

    Débora Delai, Alexander Pompermayer Jardine, Letícia Boldrin Mestieri, Daiana Boijink, Fabiana Soares Grecca & Patrícia Maria Poli Kopper

  2. Department of Orthopedics and Surgery of the School of Dentstry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil

    Vania Regina Camargo Fontanella

Authors
  1. Débora Delai
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  2. Alexander Pompermayer Jardine
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  3. Letícia Boldrin Mestieri
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  4. Daiana Boijink
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  5. Vania Regina Camargo Fontanella
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  6. Fabiana Soares Grecca
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  7. Patrícia Maria Poli Kopper
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Corresponding author

Correspondence to Patrícia Maria Poli Kopper.

Ethics declarations

This study was approved by the Institutional Review Board of the Federal University of Rio Grande do Sul (CAAE 51687215.3.0000.5347).

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the Institutional Review Board and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Delai, D., Jardine, A.P., Mestieri, L.B. et al. Efficacy of a thermally treated single file compared with rotary systems in endodontic retreatment of curved canals: a micro-CT study. Clin Oral Invest 23, 1837–1844 (2019). https://doi.org/10.1007/s00784-018-2624-6

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  • DOI: https://doi.org/10.1007/s00784-018-2624-6

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