Using Periapical Radiography to Differentiate Periapical Granuloma and Radicular Cysts

The distinction between radicular cysts and apical granulomas is important in treatment decision..
The current study aimed to differentiate these two lesions based on radiography images..
Patients and The material consisted of 138 radiographs obtained using Kodak E -speed, in patients aged 29 to 47, divided into two groups: 109 granulomas and 29 radicular cysts. Size of radiography images was measured; the tooth then was extracted and examined in pathologist lab. The results were analyzed by SPSS.15 and ROC curve was created to find cut-off point to differentiate periapical granuloma and radicular cysts..
Average size of radiography in periapical granuloma was 7.4 mm and for a radicular cyst was 11.1 mm. Cut-off point was 8.2 mm and the area under curve (AUC) was 0.63. Also, the tests were 83% sensitive and 79% specific..
Based on 8.2 mm cut-off point could differentiate 83% periapical granulomas and 79% radicular cysts from radiography images..