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Frequency of head and stem damage scores for the subgroups of CoCr/CoCr and CoCr/Ti couples selected for the evaluation of surface topography
| Alloy couple | Damage score | |||||||
|---|---|---|---|---|---|---|---|---|
| None (1) | Mild (2) | Moderate (3) | Severe (4) | |||||
| Number | Percent | Number | Percent | Number | Percent | Number | Percent | |
| CoCr/CoCr (stem taper) | 18 | 49 | 8 | 22 | 11 | 30 | 0 | 0 |
| Ti/CoCr (stem taper) | 15 | 45 | 10 | 30 | 8 | 24 | 0 | 0 |
| CoCr/CoCr (head taper) | 25 | 68 | 5 | 14 | 3 | 8 | 4 | 11 |
| Ti/CoCr (head taper) | 21 | 64 | 6 | 18 | 2 | 6 | 4 | 12 |
