by University of Sharjah, University of Sharjah The radiographic criteria used to confirm the diagnosis of osteoarthritis. (a) Subcortical cyst (radiolucent area that may be just below the cortex or in the trabecular bone). (b) Flattening of the articular surfaces (disappearance of the even convexity or concavity of the articular surfaces). (c) Osteophyte (bony outgrowth arising...