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. Author manuscript; available in PMC: 2013 Nov 1.
Published in final edited form as: J Bioact Compat Polym. 2012 Nov;27(6):585–603. doi: 10.1177/0883911512458050

Figure 3.

Figure 3

ATR FT-IR spectra of (a) standard HAP powder, (b) enamel surface after treatment with remineralization hydrogel containing fluoride, (c) enamel surface after treatment with remineralization hydrogel containing fluoride and amelogenin, and (d) freeze-dried remineralization hydrogel containing fluoride and amelogenin after 24-h incubation at 37°C. Notably, the spectrum (d) has no absorption peak around 600 cm−1 corresponding to HAP or OCP.

ATR FT-IR: attenuated total reflectance–Fourier transform infrared; HAP: hydroxyapatite; OCP: octacalcium phosphate; F: fluoride.