Figure 7.

(a) Average IR spectra recorded on the surface of a BG-PDMS disk aged in HBSS for 28 days in dentin remineralization experiments (“BG-PDMS” and “BG-PDMS+GP” experiment). The spectra are normalized to the absorbance of the 1258 cm⁻¹ band. The bands ascribable to an amorphous carbonate-containing calcium phosphate deposition are indicated with a square. (b) IR A₁₀₁₀/A₁₂₅₈ absorbance ratio (average ± standard deviation) as calculated from the IR spectra of the BG-PDMS disks reported above. No statistically significant differences between values were observed (n = 3, p = 0.6644).