Figure 4.

Average micro-Raman spectra: (a) recorded on the implant before immersion (100× magnification and laser power at the sample of 10 mW), and (b) after ageing in HBSS for 28 days (100× magnification and laser power at the sample of 20 mW). The spectrum in the inset was recorded on the implant before immersion at 100× magnification and laser power at the sample of 20 mW (i.e., under the same conditions as the aged implant). All the spectra are reported with their original intensity (no scaling-up was performed).