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Comparison of average roughness (R a) values on samples displaying scrape damage.
| Femoral head | Number of scrape regions | Average scrape area (mm2) | R a (μm) | ||
|---|---|---|---|---|---|
| RowSpanEmpty | RowSpanEmpty | Mean ± SD | Min | Max | |
| 2 | 22 | 1.57 | 0.28 ± 0.27 | 0.03 | 1.21 |
| 3 | 104 | 1.20 | 0.17 ± 0.11 | 0.01 | 0.55 |
| 6 | 68 | 5.09 | 0.21 ± 0.08 | 0.05 | 0.39 |
| 8 | 71 | 8.03 | 1.12 ± 1.25 | 0.03 | 4.20 |
| 9 | 44 | 1.05 | 0.26 ± 0.15 | 0.05 | 0.65 |
