A sensitometric comparison of four dental X-ray films and their diagnostic accuracy

Dento Maxillo Facial Radiology
B SvensonG Tronje

Abstract

To compare the sensitometric properties and accuracy in the diagnosis of approximal caries of two E-speed (Ektaspeed Plus and EV 57) and two D-speed (Ultra-speed and DV 57) films. Speed and contrast for the four films were determined following 30 exposures for each film. Base plus fog density was measured on unexposed films and the increase was studied over a 18-month period. Seventy-five extracted premolars with known pathology were radiographed under standardized conditions and the radiographs assessed by nine observers for approximal caries. Receiver Operating Characteristic (ROC) curve technique was used to analyse the diagnostic accuracy. The sensitometric analysis showed that the Ektaspeed Plus film had the highest speed of the four films. At a density of 1.0 it was 2.28 times faster than Ultra-speed. The contrast of Ektaspeed Plus was comparable with that of the other films and base plus fog density plateaued at 0.4 ten months before expiry date. There were no statistically significant differences in diagnostic accuracy for white spot lesions between the four films. For cavitations there was a significant difference between EV 57 and DV 57 and Ektaspeed Plus (P = 0.005) but not between Ultra-speed and Ektaspeed Plus nor ...Continue Reading

References

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Citations

May 25, 2002·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·James R Geist, Jerald O Katz
Mar 31, 2000·Dento Maxillo Facial Radiology·A Wenzel, H Hintze
Sep 2, 2006·The Journal of the American Dental Association·UNKNOWN American Dental Association Council on Scientific Affairs

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