Table 2.
The characteristics of the 154 retrieved implants
| Characteristic | Number (%) |
|---|---|
| Head size (number of hips) | |
| 22 mm | 20 (12.9) |
| 26 mm | 6 (3.9) |
| 28 mm | 46 (29.9) |
| 32 mm | 52 (33.8) |
| 36 mm | 22(14.3) |
| 38 mm | 1 (0.65) |
| 40 mm | 6 (3.9) |
| 44 mm | 1 (0.65) |
| Stem material (number of hips) | |
| Co-Cr | |
| Forged | 56 (36.4) |
| Cast | 19 (12.3) |
| Ti | |
| Ti-6Al-4V | |
| Forged | 48 (31.2) |
| Wrought | 14 (9.1) |
| Machined | 11 (7.1) |
| Ti-12Mo-6Zr-2Fe | 6 (3.9) |
| Taper/trunnion design (number of hips) | |
| 12/14 | 58 (37.7) |
| C-taper | 30 (19.5) |
| V40 | 15 (9.7) |
| 11/13 | 15 (9.7) |
| Type I | 8 (5.2) |
| PCA | 6 (3.9) |
| Other | 22 (14.3) |
| Material combination (number of hips) | |
| Same (CoCr-CoCr) | 73 (47.4) |
| Different (CoCr-Ti) | 81 (52.6) |
CoCr = cobalt-chromium; Ti = titanium.