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Endodontic retreatment: clinical comparison of reciprocating systems versus rotary system in disinfecting root canals

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Abstract

Introduction

This clinical study was conducted to compare the effectiveness of single-file reciprocating systems and rotary systems in removing endotoxins and cultivable bacteria in endodontic retreatment.

Methods

Thirty endodontically treated teeth with post-treatment apical periodontitis were selected. The specimens were divided into three groups according to the system used: WaveOne (n = 10), Reciproc instrument (n = 10), and ProTaper Universal Retreatment system (n = 10). Samples were collected before and after chemomechanical preparation. The irrigation was performed by using 2.5 % sodium hypochlorite. A chromogenic limulus amebocyte lysate assay test was used to quantify endotoxins. Culture techniques were used to determine bacterial colony-forming unit counts.

Results

At baseline, endotoxins and cultivable bacteria were recovered from 100 % of the root canal samples in a median value of 5.84 EU/mL and 4.98 × 103 CFU/mL, respectively. After CMP, no differences were found in the median percentage values of endotoxin reduction achieved with reciprocating systems—WaveOne [94.11 %] and Reciproc [93.29 %] and with rotary systems—ProTaper [94.98 %] (P > 0.05). Both single-file reciprocating systems [WaveOne (98.27 %) and Reciproc (99.54 %)] and rotary system [ProTaper (98.73 %)] were effective in reducing bacterial load (P > 0.05). Moreover, no differences were found among the systems tested.

Conclusions

The Reciproc and WaveOne reciprocating systems were as effective as the ProTaper system for removal of endotoxins and bacteria in endodontic retreatment.

Clinical relevance

All systems tested were effective to remove cultivable bacteria and endotoxin in endodontic retreatment. As no differences among systems were observed, it is possible to suggest that clinicians should choose the preferred technique to perform endodontic.

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Acknowledgments

This work was supported by the Brazilian agencies FAPESP, CAPES and CNPq.

Conflict of interest

The authors deny any conflicts of interest.

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Authors and Affiliations

  1. Department of Restorative Dentistry, Endodontics Division–UNESP-UNIV Estadual Paulista, São José dos Campos Dental School, São José dos Campos, São Paulo, Brazil

    Frederico C. Martinho, Aleteia M Fernandes & Ana P. M. Gomes

  2. Department of Restorative Dentistry, Endodontics Division, Piracicaba Dental School, State University of Campinas-UNICAMP, Piracicaba, São Paulo, Brazil

    Frederico C. Martinho

  3. Department of Restorative Dentistry, Endodontic Division, Fluminense Federal University (UFF), Niteroi, RJ, Brazil

    Lilian F. Freitas & Izabel C G Camões

  4. Department of Semiology and Clinics, Periodontics Division, Federal University of Pelotas Dental School, Pelotas, Rio Grande do Sul, Brazil

    Gustavo G. Nascimento & Fabio R. M. Leite

  5. Department of Restorative Dentistry, Endodontic Division, São José dos Campos Dental School, State University of São Paulo -UNESP, Eng Francisco José Longo, 777, 12245-000, São José dos Campos, São Paulo, Brazil

    Frederico C. Martinho

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  1. Frederico C. Martinho
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  2. Lilian F. Freitas
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  6. Ana P. M. Gomes
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  7. Izabel C G Camões
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Correspondence to Frederico C. Martinho.

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Martinho, F.C., Freitas, L.F., Nascimento, G.G. et al. Endodontic retreatment: clinical comparison of reciprocating systems versus rotary system in disinfecting root canals. Clin Oral Invest 19, 1411–1417 (2015). https://doi.org/10.1007/s00784-014-1360-9

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  • DOI: https://doi.org/10.1007/s00784-014-1360-9

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