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Objective assessment of simulated non-carious cervical lesion by tridimensional digital scanning

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Abstract

Objective

To explore the use of 3D intraoral scanner/image analysis for the detection and monitoring of simulated non-carious cervical lesions (NCCLs) in vitro.

Materials and methods

A total of 288 NCCLs of different severities and simulated using a laboratorial model associating toothbrush stiffness (soft, medium, and hard) and toothpaste abrasivity (low, medium, high, and negative control) were analyzed. Dental impressions were taken from specimens before and after 35K and 65K brushing strokes, and then scanned with a CEREC Omnicam scanner. 3D models were analyzed for volumetric tooth loss. 3D optical profilometry was considered as the gold standard. Data were analyzed using ANOVA and Fisher’s PLSD tests (alpha = 0.05), and agreement between methods by using intraclass correlation coefficient.

Results

Toothbrushes of hard and mid stiffness caused higher tooth loss than soft when associated with the highest abrasive, at 35K and 65K strokes (p < 0.001). Variation in slurry abrasivity led to differences in tooth loss (with control < low < medium < high, p < 0.0001) after both 35K and 65K strokes, regardless of the type of toothbrush used, except at 35K, wherein control = low (p = 0.55). 35K strokes caused less tooth loss than 65K for all abrasive slurries (p < 0.0001) except controls. The intraclass correlation coefficient for agreement between the test and gold standard methods was 0.85.

Conclusions

Analysis of 3D images from intraoral scanner could detect and monitor NCCL progression, although this ability was limited on incipient lesions. Overall good agreement was found between the test method and optical profilometry.

Clinical relevance

The suggested method may be applicable to detect and monitor NCCLs clinically.

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Acknowledgments

This research was part of CFC’s dissertation to be submitted in partial fulfillment of the MSD degree in Dentistry, from the Graduate Program in Dentistry at the Federal University of Paraiba, Brazil, and part of JN’s thesis submitted in partial fulfillment of honors requirements in Biomedical Engineering at the University of Arkansas.

Funding

This study was partially supported by Nacional Council for Scientific and Technological Development (CNPq), Brazil, and by the Erosive Tooth Wear Research Program of the Indiana University School of Dentistry.

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Authors and Affiliations

  1. Department of Morphology, Health Sciences Center, Federal University of Paraíba, João Pessoa, PB, Brazil

    Caroline de F. Charamba & Frederico B. de Sousa

  2. Department of Anthropology, University of Arkansas, Fayetteville, AR, USA

    James Needy & Peter S. Ungar

  3. Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA

    George J. Eckert

  4. Department of Cariology, Operative Dentistry and Dental Public Health, Indiana University School of Dentistry, 415 Lansing St, Indianapolis, IN, USA

    Anderson T. Hara

Authors
  1. Caroline de F. Charamba
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  2. James Needy
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  3. Peter S. Ungar
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  4. Frederico B. de Sousa
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  5. George J. Eckert
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  6. Anderson T. Hara
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Corresponding author

Correspondence to Anderson T. Hara.

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The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed 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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Charamba, C.d.F., Needy, J., Ungar, P.S. et al. Objective assessment of simulated non-carious cervical lesion by tridimensional digital scanning. Clin Oral Invest 25, 4069–4074 (2021). https://doi.org/10.1007/s00784-020-03737-z

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  • DOI: https://doi.org/10.1007/s00784-020-03737-z

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