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Micro-CT evaluation of four final irrigation protocols on hard-tissue debris removal from mesial roots of mandibular molars containing isthmus

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Abstract

Objectives

To evaluate by means of microcomputed tomography (micro-CT), the efficacy of four final irrigation protocols in the removal of hard-tissue debris (HTD) in mesial roots of mandibular molars containing isthmus.

Materials and methods

Forty standardized mesial roots of extracted mandibular molars presenting isthmus were selected. The root canals were prepared and randomly divided into 4 groups (n = 10): EA, EndoActivator (Dentsply Sirona); EC, Easy Clean (Easy Dental Equipment, Belo Horizonte, Brazil); XPF, XP-Endo Finisher (FKG Dentaire, La Chaus-de Fonds, Switzerland); and PUI, passive ultrasonic irrigation using Irrisafe tip (Satelec Acteon, Merignac, France). Each final irrigation protocol was performed in two cycles (60 s), using, respectively, 2.5% sodium hypochlorite and 17% EDTA. Micro-CT scans were obtained pre-operatory, post-preparation, and post-irrigation. The percentage of HTD reduction was calculated. Data was analyzed statistically (ANOVA and Kruskal–Wallis, significance set at 5%).

Results

The percentage of HTD reduction was greatest for the XPF group (77.92%), followed by EA (62.92%), PUI (47.48%), and EC (32.65%). Statistical differences (p < .05) were found between XPF and EC only. A significant difference (p < .05) was found between XPF and EC in all thirds and between PUI and EC in the middle third.

Conclusions

XPF, EA, and PUI were similarly effective in HTD reduction. However, none of the evaluated protocols was able to completely remove all the debris.

Clinical relevance

Final irrigation protocols aim to clean the canal complexities that are not addressed by the shaping procedures. Micro-CT allowed to assess the removal of hard-tissue debris in the isthmus and canals of mandibular molars.

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Acknowledgements

The authors deny any conflicts of interest related to this study. The authors extended thanks to Dr. Sérgio Aparecido Ignácio for his assistance with the statistical analysis.

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Authors and Affiliations

  1. Department of Dentistry, School of Life Sciences, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil

    Bianca Marques de Mattos de Araujo, Alessandra Timponi Goes Cruz, Everdan Carneiro, Vânia Portela Ditzel Westphalen & Ulisses Xavier da Silva Neto

  2. Department of Periodontics & Endodontics, University at Buffalo, Buffalo, NY, USA

    Lucila Piasecki & Mariel Webber

Authors
  1. Bianca Marques de Mattos de Araujo
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  2. Alessandra Timponi Goes Cruz
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  3. Lucila Piasecki
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  4. Mariel Webber
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  5. Everdan Carneiro
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  6. Vânia Portela Ditzel Westphalen
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  7. Ulisses Xavier da Silva Neto
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Corresponding author

Correspondence to Lucila Piasecki.

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All the procedures performed in the studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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de Mattos de Araujo, B.M., Cruz, A.T.G., Piasecki, L. et al. Micro-CT evaluation of four final irrigation protocols on hard-tissue debris removal from mesial roots of mandibular molars containing isthmus. Clin Oral Invest 26, 6121–6128 (2022). https://doi.org/10.1007/s00784-022-04561-3

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  • DOI: https://doi.org/10.1007/s00784-022-04561-3

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