Table 2.
Clinical and radiographic findings
| Alumina/alumina | CoCr/HXLPE | p | |
|---|---|---|---|
| HHS | |||
| Preoperative (/100) | 45.6 ± 8.2 | 43.1 ± 8.2 | 0.06 |
| Postoperative (/100) | 95.1 ± 3.9 | 93.8 ± 5.1 | 0.07 |
| Pain none or slight (%) | 93 | 95 | 0.75 |
| Limp none or mild (%) | 98 | 96 | 0.67 |
| Patients’ satisfaction (%) | 98 | 97 | 1.00 |
| Good and excellent (%) | 96 | 94 | 0.48 |
| Radiographic findings | |||
| Femoral component | |||
| RLL zone 1 (%) | 1 | 7 | 0.08 |
| RLL zone 7 (%) | 1 | 4 | 0.27 |
| Subsidence | 0 | 0 | 1.00 |
| Instability | 0 | 1 | 0.29 |
| Pedestal | 18 | 23 | 0.63 |
| Acetabular component | |||
| RLL zone 1 (%) | 2 | 3 | 0.93 |
| RLL zone 2 (%) | 1 | 0 | 0.34 |
| RLL zone 3 (%) | 1 | 3 | 0.51 |
| Migration | 0 | 0 | 1.00 |
CoCr cobalt chrome, HXLPE highly cross-linked polyethylene, RLL radiolucent line