Abstract: Objective To compare the panoramic radiography with cone-beam computed tomography(CBCT) in diagnostic accuracy of mophological changes of the condyle in adult patients with AngleⅡ2 . Methods 60 cases of AngleⅡ2 divided into two groups:A asymptomatic and B symptomatic cases.60 cases were taken by panoramic radiography and CBCT respectively,and significance was made by statistical analysis.Results For the consistency of the diagnosis,CBCT was better than that of panoramic radiography. Take CBCT test as the gold standard, the diagnostic accuracy of panoramic radiography was 66.7% in group A and 85.7% in group B. Conclusions panoramic radiography can be applied in the diagnosis of mophological changes of the condyle in adult patients with AngleⅡ2,but the sensitivity was lower than CBCT.

Key words: Panoramic radiography , Cone-beam computed tomography, Temporomandibular joint, AngleⅡ2malocclusions