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Influence of X-ray beam angulation in the detection of proximal caries: Interobserver agreement in the CCD system

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Abstract

The aim of this study was to assess the influence of changes in horizontal and vertical X-ray beam angulation on interobserver agreement in the diagnosis of approximal caries using a charge coupled device-based digital dental imaging system (digital system) in comparison with a conventional film-based radiography (film system).

A total of 40 teeth were radiographed. Projection angles were varied within a range of±20° in the horizontal and vertical direction using both systems. The resulting radiographs of approximal surfaces were observed by six radiologists, and the presence and absence of caries and the depth of any caries they found were evaluated. Results were analyzed by comparing Cohen's kappa values.

The overall kappa values in both systems belonged to the same category of agreement strength for any horizontal or vertical beam angle. The deviation of the horizontal angulation, if anything, reduced the kappa values in the digital system, except for score 2 based on rating score for caries depth. On the other hand, the influence of vertical angulation was smaller than that of horizontal angulation at scores 0, 1 and overall.

The results of the presentin vitro study, in which there was no apparent discrepancy in the influence of beam angulation on interobserver agreement of the diagnostic abilities, suggest that the digital system plays a useful role in clinical caries diagnosis.

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Authors and Affiliations

  1. Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin Uniersity, 2-11 Suemori-dori, Chikusa-ku, 464-8651, Nagoya, Japan

    Yoshiko Ariji D.D.S., Ph.D., Yasuyuki Shimizu D.D.S., Tsuneichi Okano Ph.D., Munetaka Naitoh D.D.S., Ph.D., Hidemichi Yuasa D.D.S., Ph.D., Jinichi Takahashi D.D.S., Hiroto Iida D.D.S. & Eiichiro Ariji D.D.S., Ph.D.

  2. Department of Operative Densitry, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan

    Osamu Matsui D.D.S., Ph.D. & Akira Senda D.D.S., Ph.D.

  3. Department of Dental Material Science, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan

    Jiro Hasegawa D.D.S., Ph.D.

Authors
  1. Yoshiko Ariji D.D.S., Ph.D.
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  2. Yasuyuki Shimizu D.D.S.
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  3. Tsuneichi Okano Ph.D.
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  4. Osamu Matsui D.D.S., Ph.D.
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  5. Munetaka Naitoh D.D.S., Ph.D.
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  6. Hidemichi Yuasa D.D.S., Ph.D.
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  7. Jinichi Takahashi D.D.S.
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  8. Hiroto Iida D.D.S.
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  9. Jiro Hasegawa D.D.S., Ph.D.
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  10. Akira Senda D.D.S., Ph.D.
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  11. Eiichiro Ariji D.D.S., Ph.D.
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Ariji, Y., Shimizu, Y., Okano, T. et al. Influence of X-ray beam angulation in the detection of proximal caries: Interobserver agreement in the CCD system. Oral Radiol. 15, 27–35 (1999). https://doi.org/10.1007/BF02489754

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  • DOI: https://doi.org/10.1007/BF02489754

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