Migration of the Duraloc cup at two years

We carried out 71 primary total hip arthroplasties using porous-coated, hem ispherical press-fit Duraloc '100 Series' cups in 68 consecutive patients; 61 were combined with the cementless Spotorno stem and ten with the cemente d Lubinus SP II stem. Under-reaming of 2 mm achieved a press-fit. Of the 71 hips, 69 (97.1%) were followed up after a mean of 2.4 years. Migration ana lysis was performed by the fin Bild Rontgen Analyse method, with an accurac y of 1 mm, The mean total migration after 24 months was 1.13 mm, Using the definition of loosening as a total migration of 1 mm, it follows that 30 out of 63 cup s (48%) were loose at 24 months.