A comparison of kodak ektaspeed plus film and the siemens sidexis digital imaging system for caries detection using receiver operating characteristic analysis

https://doi.org/10.1016/S1079-2104(98)90408-5Get rights and content

Abstract

Objective. To evaluate the accuracy of proximal caries detection comparing enhanced and unenhanced Siemens Sidexis CCD-based digital images with Ektaspeed Plus films utilizing receiver operating characteristic analysis.

Study Design. Sixty extracted teeth (24 posterior and 36 anterior) were imaged under identical standardized geometric and exposure conditions. Six observers, using a 5-point confidence scale, rated 120 proximal surfaces for the presence or absence of carious lesions by means of three image modalities: (1) observer enhanced and (2) unenhanced Sidexis displays, and (3) Ektaspeed Plus films. The ground truth was determined by microscopic analysis of ground sections. Receiver operating characteristic curves were generated with calculated areas (Az) analyzed with analysis of variance for effect of reader, reading, and modality.

Results. Analysis of variance demonstrated significant differences among readers, readings and modalities (mean square values of 0.012, 0.005, 0.004, F ratios of 13.604, 5.329, 5.100; p = values of 0.001, 0.043, and 0.030, respectively). Post-hoc paired comparisons of modalities using Tukey's statistic demonstrated that only film and enhanced Sidexis images were different from each other (p = 0.024). Az scores were 0.7650, 0.7499, and 0.8008 respectively, for unenhanced Sidexis, enhanced Sidexis, and Ektaspeed Plus film.

Conclusion. Unenhanced digital Sidexis images were equivalent to film for the detection of proximal caries in this in vitro study. Observer enhanced Sidexis images exhibited a statistically significant lower diagnostic accuracy than the unenhanced digital and film images.

References (27)

  • SR Matteson et al.

    The effect of lesion size, restorative material, and film speed on the detection of recurrent caries

    Oral Surg Oral Med Oral Pathol

    (1989)
  • E Platin

    An investigation of selected factors associated with knowledge, adoption, and attitudes of North Carolina general dentists toward dental radiology quality assurance

  • RC Lundeen et al.

    Proximal surface caries detection with direct-exposure and rare earth screen/film imaging

    Oral Surg Oral Med Oral Pathol

    (1988)
  • Cited by (85)

    View all citing articles on Scopus

    Supported by a contract with Siemens Inc., Bensheim, Germany.

    a

    Associate Professor

    b

    Assistant Clinical Professor

    c

    Fellow, Oral and Maxillofacial Radiology

    View full text