Volume : 3
Issue : 3
Online ISSN : 2395-6194
Print ISSN : 2395-6186
Article First Page : 142
Article End Page : 148
Objectives: Purpose of present study was to assess the validity of Orthopantomograph (OPG), limited volume Cone Beam Computed Tomography (CBCT) and Computed Tomography (CT) in evaluating the simulated lesions over the mandibular condyles.
Materials and Method: 15 dry human mandibles (30 mandibular condyles) with intact mandibular condyles were used in this study. Total of 46 lesions were created randomly on anterosuperior (AS), superior (S) and posterosuperior (PS) surfaces of the condyle with 1mm surgical bur. Subsequently all the mandibles were subjected to OPG, CBCT and CT for assessing artificially created lesions. Two observers assessed the images for presence or absence of the lesions, number and surface of the lesions in each condyle.
Results: Statistically good agreement was obtained between 2 observers in assessment of the lesions with all the three imaging modalities. With CBCT 100% sensitivity and specificity was obtained. CT produced 96.67% sensitivity and 100% specificity. Sensitivity obtained with OPG was 24.14% and specificity was 100%. Good agreement was obtained between CT and CBCT in detecting the lesions and it was found to be 96.67%.
Conclusion: Accuracy of CBCT was found to be 100% and it was superior to CT (96.67%) in detecting the lesions over the mandibular condyle and OPG produced least accuracy (24.14%). Owing to the facts like high radiation dose and high cost of CT, we suggest CBCT as a better imaging modality for incipient bony changes of TMJ. However further studies with more samples are required to confirm these results.
Keywords: TMJ; Simulated lesions; OPG; CT; CBCT