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Irrigant flow characteristics in the root canal with internal root resorption: a computational fluid dynamics evaluation

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Abstract

Irrigation dynamics of syringe irrigation with different needle designs (side-vented, double side-vented, notched) and ultrasonic irrigation in the root canal with internal root resorption were evaluated using a computational fluid dynamics model. A micro-CT scanned mandibular premolar was used for modeling internal root resorption. The needles and the ultrasonic tip were positioned at 2, 4, and 5 mm from the working length. The insertion depth and the irrigation model were found influential on the shear stress and the irrigant extension. The extension of the irrigant increased toward 2–5 mm from the working length. Ultrasonic irrigation revealed the highest shear stress values regardless of the insertion depth. The shear stress distribution on the resorption cavity walls gradually increased when the needles were positioned coronally. The residence time of the irrigant in the canal was affected by the needle position relative to the internal root resorption cavity and the needle type.

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Author information

Authors and Affiliations

  1. Department of Endodontics, İstanbul Okan University Faculty of Dentistry, İstanbul, Turkey

    Elif Çiftçioğlu

  2. Department of Chemical Engineering, Gebze Technical University Faculty of Engineering, Kocaeli, Turkey

    Özgün Yücel

  3. Department of Endodontics, İstanbul Health and Technology University Faculty of Dentistry, İstanbul, Turkey

    Vasfiye Işık & Mehmet Baybora Kayahan

  4. Department of Endodontics, Ondokuz Mayıs University Faculty of Dentistry, Samsun, Turkey

    Ali Keleş

Authors
  1. Elif Çiftçioğlu
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  2. Özgün Yücel
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  3. Vasfiye Işık
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  4. Ali Keleş
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  5. Mehmet Baybora Kayahan
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Contributions

The authors confirm contribution to the paper as follows: EÇ designed the study and prepared the draft manuscript. ÖY: performed CFD simulations and analyzed the results. VI: collected data and contributed to manuscript’s writing. AK: provided micro-CT scanning and contributed to writing the manuscript. MBK: revised the manuscript. All authors reviewed the results and approved the final version of the manuscript.

Corresponding author

Correspondence to Elif Çiftçioğlu.

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Conflict of interest

The authors confirm that there are no known conflicts of interest associated with this publication. The authors received no financial support for the research, authorship, and/or publication of this article.

Ethical approval

The study proposal was approved by the İstanbul Okan University Ethics Committee (2020/132).

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Çiftçioğlu, E., Yücel, Ö., Işık, V. et al. Irrigant flow characteristics in the root canal with internal root resorption: a computational fluid dynamics evaluation. Odontology 110, 769–776 (2022). https://doi.org/10.1007/s10266-022-00698-5

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  • DOI: https://doi.org/10.1007/s10266-022-00698-5

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