Table 3

Details of revision cases

Total number of joints revised71
Mean time to failure (months)52 (11.5–112)
Males vs females16:55191:227<0.001
Bilateral vs unilateral24:4776:342<0.001
Median age66680.052
Median (range) HHS66 (23–100)91 (28–100)<0.001
Median liner size male55560.591
Median liner size female52520.146
Median (range) acetabular inclination (°)42.8 (32.5–55.9)44.6 (26–65.6)0.053
Median (range) acetabular anteversion (°)13.0 (1.8–34.8)16.2 (0–47.3)0.005
Median (range) blood Cr unilaterals (µg/L)3.62 (0.88–26.2)4.580 (0.37–20.3)<0.001
Median (range) blood Co unilaterals (µg/L)3.62 (0.86–19.7)1.48 (0.33–12.5)<0.001
Median (range) blood Cr bilaterals (µg/L)9.72 (0.47–26.3)6.15 (0.8–18.4)0.001
Median (range) blood Co bilaterals (µg/L)9.54 (1.42–27.0)3.39 (0.33–22.1)<0.001
Median (range) bearing surface wear rates (mm3 per year)1.92 (0.23–8.37)0.88 (0.23–7.43)0.007
Median (range) combined wear rates (mm3 per year)2.19 (0.35–8.43)1.57 (0.29–8.13)0.038
SROM PinnaclesCorail PinnaclesSignificance
Median (range) female taper wear rates (mm3 per year)0.04 (0–0.50)0.21 (0–2.20)<0.001
  • It can be seen that failed joints were more likely to have cups placed at lower angles of inclination and lower anteversion, though the positions in which they were placed would generally be regarded as acceptable. A full discussion of the implications of this finding is beyond the scope of this paper. It was a result, however, which was in direct contrast to our previous findings with the ASR device.15

  • HHS, Harris Hip Score.