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Assessment of the root filling volume in C-shaped root canal on cone-beam CT and micro-CT in relation to nano-CT

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Abstract

Aim

To assess the observed volume of filled C-shaped root canals from different CBCT and micro-CT having nano-CT as a reference.

Materials and methods

Twelve extracted mandibular molars with C-shaped root canals were endodontically treated using Reciproc Blue R25 (VDW GMBH, Munich, Germany) in a reciprocating system and filled with gutta-percha (Dentsply Maillefer) and AH Plus sealer (Dentsply DeTrey, Konstanz, Germany). CBCT scans were performed using 3 units—3D Accuitomo 170 (J. Morita, Kyoto, Japan), ProMax 3D Max (Planmeca, Helsinki, Finland), and NewTom VGi EVO (Cefla QR, Verona, Italy)—at two resolution modes: standard and high. Micro-CT and nano-CT scans were also obtained. The volume of all filled C-shaped root canals was obtained using CTAn software (Bruker, Kontich, Belgium), and the blooming artifact, in relation to nano-CT volume, was calculated. The data were evaluated by the Bland–Altman plots and ANOVA two-way for repeated measures (α = 0.05).

Results

All CBCT units and micro-CT showed significantly larger observed volume of root canal filling when compared to nano-CT. The blooming artifact of root canal filling in standard resolution was significantly larger than that in high resolution (p < 0.05) in all CBCT units.

Conclusions

Endodontic filling material with AH Plus sealer causes blooming artifacts in CBCT units and micro-CT.

Clinical relevance

Considering the anatomical complexity of C-shaped root canals and the challenges associated with endodontic treatment, CBCT is frequently recommended for follow-up evaluations. However, the presence of endodontic filling material can result in blooming artifacts that may potentially impact the accurate diagnosis of endodontic complications.

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Funding

The authors gratefully acknowledge financial support from São Paulo Research Foundation, FAPESP, 2018/14450–1 and nº 2021/01623–8. Ruben Pauwels is supported by the European Union Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie grant agreement number 754513 and by Aarhus University Research Foundation (AIAS-COFUND).

Author information

Authors and Affiliations

  1. Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café-Subsetor Oeste–11 (N-11), Ribeirão Preto, São Paulo, 14040-904, Brazil

    Amanda Pelegrin Candemil, Jardel Francisco Mazzi-Chaves & Manoel Damião Sousa-Neto

  2. Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil

    Matheus Lima Oliveira

  3. Department of Statistical Genetics, Luiz de Queiroz College of Agriculture, University of São Paulo, São Paulo, Brazil

    Guilherme Bovi Ambrosano

  4. OMFS IMPATH Research Group, Department of Imaging and Pathology, KU Leuven, Leuven, Belgium

    Karla Farias Vasconcelos & Reinhilde Jacobs

  5. Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand

    Ruben Pauwels

  6. Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark

    Ruben Pauwels

  7. Department Dental Medicine, Karolinska Institute, Stockholm, Sweden

    Reinhilde Jacobs

Authors
  1. Amanda Pelegrin Candemil
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  2. Jardel Francisco Mazzi-Chaves
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  3. Matheus Lima Oliveira
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  4. Guilherme Bovi Ambrosano
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  5. Karla Farias Vasconcelos
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  6. Ruben Pauwels
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  7. Reinhilde Jacobs
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  8. Manoel Damião Sousa-Neto
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Contributions

Amanda P. Candemil: conceptualization, methodology, data curation, formal analysis, investigation, writing (original draft), and project administration. Jardel Francisco Mazzi-Chaves, Matheus Lima Oliveira, and Guilherme Bovi Ambrosano: data curation, formal analysis, investigation, and writing—review and editing. Karla Farias Vasconcelos, Ruben Pauwels, and Reinhilde Jacobs: visualization, investigation, and writing—review and editing. Manoel Damião Sousa-Neto: conceptualization, methodology, visualization, investigation, writing (review and editing), supervision, and project administration.

Corresponding author

Correspondence to Amanda Pelegrin Candemil.

Ethics declarations

Ethical approval

This study was approved by the local Research Ethics Committee (protocol 80666517.2.0000.5419), School of Dentistry of Ribeirão Preto, University of São Paulo, Brazil.

Informed consent statement

The present study did not involve human participants.

Conflict of interest

The authors declare no competing interests.

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Candemil, A.P., Mazzi-Chaves, J.F., Oliveira, M.L. et al. Assessment of the root filling volume in C-shaped root canal on cone-beam CT and micro-CT in relation to nano-CT. Clin Oral Invest 27, 6413–6420 (2023). https://doi.org/10.1007/s00784-023-05244-3

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