Details of revision cases
| Total number of joints revised | 71 | ||
| Mean time to failure (months) | 52 (11.5–112) | ||
| Failed | Non-failed | Significance | |
| Males vs females | 16:55 | 191:227 | <0.001 |
| Bilateral vs unilateral | 24:47 | 76:342 | <0.001 |
| Median age | 66 | 68 | 0.052 |
| Median (range) HHS | 66 (23–100) | 91 (28–100) | <0.001 |
| Median liner size male | 55 | 56 | 0.591 |
| Median liner size female | 52 | 52 | 0.146 |
| 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 |
| Unilaterals | Bilaterals | Significance | |
| 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 Pinnacles | Corail Pinnacles | Significance | |
| 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.