Utility of Judet Oblique X-Rays in Preoperative Assessment of Acetabular Periprosthetic Osteolysis: A Preliminary Study

Anteroposterior (AP) x-rays provide limited information about size and location of acetabular osteolytic lesions after total hip arthroplasty (THA). In the study reported here, we sought to determine the utility of oblique (Judet) x-rays in preoperative assessment of acetabular lesions. AP, anterior (obturator), and posterior (iliac oblique) x-rays of 10 patients (10 hips) who underwent revision THA were evaluated retrospectively. Mean osteolytic area was 790 mm² (SD, 520 mm²) on anterior oblique x-rays and 384 mm² (SD, 396 mm²) on AP x-rays (P = .005). Mean osteolytic area on posterior oblique x-rays was 512 mm² (SD, 430 mm²) (P = .34). Judet x-rays were useful in determining size and location of acetabular osteolysis.