Film and digital radiography for detection of simulated root resorption cavities.
OBJECTIVE
The purpose of this study was to evaluate observers' ability to detect simulated root resorption cavities in conventional radiographs and digital radiographs from a charge-coupled device system and a storage phosphor system and to determine whether the detectability was influenced by resorption size and exposure.


METHODS
In teeth from dry mandibular jaw specimens, resorptive defects 1.2 mm in diameter and two different depths (0.6 and 0.9 mm) were prepared in the buccal root surface. Each tooth was radiographed at a number of different exposure settings. Observers were asked to rate their confidence that a resorption was or was not present using a five-graded confidence scale. Receiver operating characteristic analysis was used to evaluate the results.


CONCLUSIONS
Given optimal exposures, all systems reached what might be considered clinically acceptable Az values (> 0.75). The storage phosphor system reached this value at considerably lower exposures than those required for both the film and charge-coupled device systems. There was a tendency to better detect the deeper lesions and to identify them at lower exposures.
Department of Oral Diagnostic Radiology, Faculty of Odontology, Göteborg University, Sweden.
E
E
Borg
A
A
Källqvist
K
K
Gröndahl
H G
HG
Gröndahl
D016001:Confidence Intervals; D005069:Evaluation Studies as Topic; D006801:Humans; D008334:Mandible / Q000000981:diagnostic imaging; D015588:Observer Variation; D012372:ROC Curve; D011829:Radiation Dosage; D019252:Radiography, Dental, Digital / Q000295:instrumentation / Q000379:methods; D012391:Root Resorption / Q000000981:diagnostic imaging* / Q000473:pathology; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000473:pathology; D014962:X-Ray Film