Table 2 Surgery- and Implant-Related Data
Study group | Control group | p-value | |
|---|---|---|---|
Number of involved surgeons | 1 | 7 | |
Mean experience of the surgeon in the field of orthopaedics at the time of surgery | 17.2 ± 2.0 years | 21.8 ± 7.7 years | |
Mean acetabular cup size | 56.6 mm min: 48 mm max: 68 mm | 57.7 mm min: 48 mm max: 70 mm | 0.085 |
Mean femoral head size | 32.9 mm | 32.7 mm | 0.580 |
28 mm | 14% | 7% | |
32 mm | 50% | 72% | |
36 mm | 36% | 19% | |
40 mm | Ø | Ø | |
44 mm | Ø | 1% | |
48 mm | Ø | 1% | |
Mean femoral head size of dislocated cases | 32.0 mm (n = 3) | 33.0 mm (n = 34) | |
Fixation: | 0.001 | ||
Uncemented | 19% | 48.5% | |
Hybrid (cemented stem) | 20% | 13% | |
Inversed hybrid (cemented cup) | 4% | 2% | |
Cemented | 35% | 15% | |
No fixation (exchange of head or liner) | 22% | 21.5% | |
Exchange of following components: | 0.011 | ||
Femoral head and / or acetabular liner | 22% | 21% | |
Acetabular cup | 12% | 25% | |
Femoral stem | 24% | 14% | |
Both cup and stem replacement | 42% | 40% | |
Mean cutting-to-suture time | 157 min min: 75 min max: 293 min | 172 min min: 54 min max: 439 min | 0.042 |
Mean period of post-operative hospitalization | 9 d min: 5 d max: 19 d | 17 d min: 6 d max: 83 d | 0.001 |