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Table 1 Parameters to be analysed on each postoperative radiograph after hip arthroplasty

From: Postoperative radiograph of the hip arthroplasty: what the radiologist should know

Parameters Normal findings
Leg length Acceptable discrepancy of < 1 cm
Horizontal center of rotation Equal to that of the contralateral hip
Vertical center of rotation Equal to that of the contralateral hip
Acetabular inclination Between 30° and 50° (total & resurfacing arthroplasty)
Femoral stem positioning Neutral alignment with the longitudinal axis of the shaft
Acetabular anteversion (on a lateral radiograph) Between 5° and 25°
Cement mantle thickness 2–3 mm femoral; no consensus on acetabular mantle thickness (3 mm is suggested)