The Pearson's contingency coefficient (C) was found to be 0.664 with P < 0.001, which shows that the association between the histopathological diagnoses and USG is highly significant.
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Reliability of Ultrasonography in differentially diagnosing periapical lesions of endodontic origin in comparison with Intra-oral periapical radiography and Cone-beam computed tomography: An <i>in vivo</i> study.
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