IMAGING OF UNERUPTED AND DISPLACED TEETH BY CROSS-SECTIONAL CT SCANS

Thirty-Six impacted and displaced teeth in 29 patients were examined r adiographically by using orthopantomography (OPG) and computed tomogra phy (CT). CT scans were obtained by using both a conventional program and a dental CT software program. The radiographic images obtained wer e compared for visualization of the internal position, inclination of unerupted teeth, and diagnosis of contact and doubtful or clearly visi ble resorption of adjacent roots. Both CT methods were superior to OPG . As far as the internal position and inclination of the impacted teet h, direct contact, and clearly visible resorption are concerned, the c onventional CT program yielded the same information as the dental CT p rogram. However, the exact proportional cross sectional views obtained by dental CT yielded significantly (P < 0.01) better information abou t doubtful root absorption in adjacent teeth than did conventional CT.