Fig. 3From: Ceramic-on-ceramic versus ceramic-on-polyethylene in total hip arthroplasty: a comparative study at a minimum of 13 years follow-upAreas of osteolysis. 7 areas of femoral osteolysis according to Gruen zones (a) and 3 areas of peri-acetabular osteolysis according to De Lee and Charnley zones (b)Back to article page