Radiovisiography in the detection of periapical lesions

The periapical areas of 16 teeth from 6 human mandibular jaw specimens were randomly examined by 3 observers using conventional radiography with Kodak E-speed film and radiovisiography (with variable contrast and with fixed contrast). Each periapical area was examined preoperatively and after #2, #4, #6, and #8 sized bur periapical lesions were created in the cortical bone. The three radiographic methods were compared by repeated-measures ANOVA of the accuracy scores for the 16 periapical lesions. Accuracy increased with size of lesion, but did not vary by method. Repeated-measures ANOVA of the accuracy scores of only the smallest and no lesion condition showed that conventional radiography and radiovisiography (variable contrast) have opposite strengths. Conventional radiography tended to be more accurate in the no lesion condition, whereas radiovisiography using variable contrast was somewhat more accurate in the smallest lesion condition. The accuracy of radiovisiography with fixed contrast was not significantly different from the other two methods.