| High-Carbon Co28Cr6Mo Sliding Pairingsa,b | 100% (n = 113) |
| Alloclassic® high-carbon Metasul® modular cup (Allopro®/SULZER Medica®) | 82.0% (n = 109) |
| paired with high-carbon Metasul® head (Allopro®/SULZER Medica®) | |
| High-carbon Metasul® Press-Fit monobloc cup (Protek®/SULZER Medica®) paired with high-carbon Metasul® head (Allopro®/SULZER Medica®) | 2.3% (n = 3) |
| Alloclassic® high-carbon Metasul® modular cup (Allopro®/SULZER Medica®) paired with high-carbon Metasul® head (Protek®/SULZER Medica®) | 0.8% (n = 1) |
| Low-Carbon Co28Cr6Mo Sliding Pairings | (n = 17) |
| • BICON® low-carbon modular cup (PLUS Endoprosthetics®) paired with low-carbon metal head (PLUS Endoprosthetics®) | |
| Undocumented Co28Cr6Mo Sliding Pairings | (n = 3) |
| • Alloclassic® high-carbon Metasul® modular cup (Allopro®/SULZER Medica®) paired with undocumented metal head |