Table 3 Difference in postoperative radiographic measurements between stem types
Group I (Proxy®) N = 99 | Group II (Optimys®) N = 62 | Group III (Corail®) N = 90 | P-value (one-way ANOVA) | P-value (t-test) | |
|---|---|---|---|---|---|
Centrum-Collum-Diaphysis-Angle | |||||
Postoperative CCD Angle (mean + SD; in degrees) | 138.6 ± 5.1 | 134.0 ± 5.0 | 136.7 ± 2.9 | < 0.001 | I vs II: < 0.001 I vs III: 0.003 II vs III: < 0.001 |
Difference in CCD Angle (mean + SD; in degrees) | 9.3 ± 7.2 | 6.8 ± 6.9 | 8.6 ± 7.3 | 0.097 | |
Femoral Offset | |||||
Postoperative Femoral Offset (mean + SD; in mm) | 40.9 ± 6.9 | 43.1 ± 7.4 | 41.5 ± 5.7 | 0.125 | |
Difference in Femoral Offset (mean + SD; in mm) | 1.6 ± 6.9 | 4.1 ± 7.8 | 4.9 ± 7.2 | 0.006 | I vs II: 0.033 I vs III: 0.002 II vs III: 0.534 |
Acetabular Offset | |||||
Postoperative Acetabular Offset (mean + SD; in mm) | 34.7 ± 4.5 | 35.2 ± 3.6 | 31.9 ± 3.6 | < 0.001 | I vs II: 0.417 I vs III: < 0.001 II vs III: < 0.001 |
Difference in Acetabular Offset (mean + SD; in mm) | -1.4 ± 3.6 | -2.0 ± 4.4 | -3.3 ± 5.3 | 0.011 | I vs II: 0.394 I vs III: 0.003 II vs III: 0.071 |
Total Offset | |||||
Postoperative Total Offset (mean + SD: in mm) | 75.6 ± 7.7 | 78.3 ± 8.0 | 73.4 ± 6.4 | < 0.001 | I vs II: 0.024 I vs III: 0.042 II vs III: < 0.001 |
Difference in Total Offset (mean + SD; in mm) | 0.2 ± 6.3 | 2.1 ± 6.6 | 1.6 ± 7.2 | 0.177 | |