Table 2.
Surface roughness and water contact angle of PEEK surfaces.
| Samples | Ra/μm | Rz/μm | WCA/deg. |
|---|---|---|---|
| Bare | 2.3 ± 0.2 | 14.5 ± 1.2 | 133.0 ± 5.1 |
| O3 | 2.2 ± 0.2 | 14.0 ± 1.2 | 61.5 ± 8.3 |
| O3-P | 2.2 ± 0.1 | 13.1 ± 2.2 | 88.9 ± 9.6 |
| O3-Ca | 2.2 ± 0.1 | 13.8 ± 1.1 | 85.5 ± 9.9 |
| O3-PCa | 2.2 ± 0.2 | 15.6 ± 0.7 | 77.9 ± 7.7 |
Data are the mean ± standard derivation. Bare: untreated PEEK, O3: ozone-gas-treated PEEK, O3-P: phosphate-immobilized PEEK, O3-Ca: calcium-immobilized PEEK, O3-PCa: phosphate and calcium co-immobilized PEEK, Ra: average roughness, Rz: mean peak to valley height, WCA: water contact angle.