Screened radiographs
Screened radiographs with focus on an exact lateral view of the femoral component were taken postoperatively and at 1-, 2- and 5-year follow-up and used to evaluate radiolucent lines (RLL) and the potential progression of these. RLL were measured in six zones for the CSP group and in three additional zones around the small peg for the CTP and CLTP groups (Fig. Radiolucent lines zone for single-peg and twin-peg femoral componentsFlexion angle of the femoral component relative to the femoral bone axis measured on X-rays (positive = flexion, negative = extension)