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Automatic exposure compensation of digital radiographic technologies does not affect alveolar bone-level measurement

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Abstract

Objective

To evaluate whether the automatic exposure compensation in the presence of high-density materials can affect the measurement of alveolar bone level.

Methods

Thirty regions of seven dry skulls and six mandibles were radiographed with and without a high-density material, using two digital radiographic technologies: photostimulable phosphor plate (PSP, Digora Optime) and sensor (CMOS, Digora Toto), totaling 120 images. The distances from the cement–enamel junction to the alveolar bone crest were measured using cone-beam computed tomography (CBCT) images to represent the reference standard. The same measurements of alveolar bone level and the average of the pixel values of the image were evaluated on the radiographs. Paired t test compared the average pixel values and alveolar bone-level measurements between images with and without high-density material. One-way analysis of variance compared the difference between radiographic and CBCT measurements (α = 0.05).

Results

The high-density material reduced the pixel values in PSP (p = 0.002) and CMOS (p < 0.001) technologies, demonstrating the AEC functioning in both technologies. There was no difference in bone-level measurements between the images without and with the high-density material for both technologies (p ≥ 0.091), or between the tomographic and radiographic measurements (p ≥ 0.319).

Conclusion

In the presence of high-density material, the automatic exposure compensation reduces the average pixel values of the images (i.e., images get darker), but does not influence the radiographic measurements of alveolar bone level.

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Funding

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.

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Author notes

  1. Larissa de Oliveira Reis

    Present address: Department of Dentistry, Federal University of Juiz de Fora (UFJF-GV), Governador Valadares, MG, Brazil

Authors and Affiliations

  1. Oral Radiology Section, School of Dentistry, Federal University of Alfenas (UNIFAL-MG), Rua Gabriel Monteiro da Silva, 700, Alfenas, MG, 37130-000, Brazil

    Hugo Gaêta-Araujo

  2. Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil

    Nicolly Oliveira-Santos & Larissa de Oliveira Reis

  3. Department of Dentistry, Division of Oral Radiology, Odontomed Imagem - Medical and Dental Services, Recife, PE, Brazil

    Eduarda Helena Leandro Nascimento

  4. Department of Diagnosis and Oral Health, University of Louisville School of Dentistry, Louisville, KY, USA

    Christiano Oliveira-Santos

Authors
  1. Hugo Gaêta-Araujo
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  2. Nicolly Oliveira-Santos
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  3. Larissa de Oliveira Reis
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  4. Eduarda Helena Leandro Nascimento
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  5. Christiano Oliveira-Santos
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Corresponding author

Correspondence to Hugo Gaêta-Araujo.

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Conflict of interest

The authors declare no conflict of interest.

Ethical approval

This study was approved by the local research ethics committee (CAAE. 11542919.0.0000.5418). The study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

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Gaêta-Araujo, H., Oliveira-Santos, N., de Oliveira Reis, L. et al. Automatic exposure compensation of digital radiographic technologies does not affect alveolar bone-level measurement. Oral Radiol 39, 53–58 (2023). https://doi.org/10.1007/s11282-022-00599-x

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  • DOI: https://doi.org/10.1007/s11282-022-00599-x

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