Table 2.
Prosthetic component distribution among patients with ceramic-on-ceramic bearing THAs
| Parameter | Nonsqueaking (controls) | Squeaking (cases) | P value |
|---|---|---|---|
| Acetabular components* | 0.33 | ||
| Trident Hemispherical/PSL | 761/725 | 32/63 | |
| Diameter (mm)† | 52 (46–68) | 52 (46–62) | |
| Femoral components* | |||
| Accolade TMZF | 1131 (90%) | 83 (87%) | 0.5041 |
| Omnifit | 123 (8%) | 8 (8%) | 1.0000 |
| Restoration HA | 14 (1%) | 0 (0%) | 0.6173 |
| Restoration Modular System | 8 (0.5%) | 0 (0%) | 1.0000 |
| Super Secure-Fit HA | 8 (0.5%) | 1 (15%) | 0.4636 |
| Secure-Fit HA | 2 (0.15%) | 0 (0%) | 0.4636 |
| Femoral heads‡ | |||
| 28 mm diameter | 230 (16%) | 15 (16%) | 0.8822 |
| 32 mm diameter | 913 (61%) | 59 (62%) | 0.1930 |
| 36 mm diameter | 334 (23%) | 21 (22%) | 0.5398 |
* Implant components were made by Stryker Orthopaedics (Mahwah, NJ); †values are expressed as mode, with range in parentheses; ‡femoral heads and liners were alumina ceramics made by Ceramtec AG (Plochingen, Germany); PSL = peripheral self locking; TMZF = titanium-molybdenum-zirconium-ferrous; HA = hydroxyapatite.