Arthrography in Legg-Calvé-Perthes Disease

Plain radiographs and arthrograms were taken of 76 hips with Legg-Calvé-Perthes disease. The occurrence of lateral subluxation as seen in the plain radiographs was compared with that found at arthrography. In 43 of the 76 hips, the femoral head was found to be subluxated in both plain radiographs and at arthrography. In the remaining 33 hips, plain radiographs could not verify any subluxation, but arthrography showed subluxation in 32 of these 33 hips.