Figure 3.

XRD spectra of the regenerated layers on demineralized enamel surface after 2 (a) and 7 days (b). Note an increase in the 002 diffraction signal after the 7 day peptide-treated incubation period. (c) Comparison of diffraction intensities of (002) to (211) ratios; (I₀₀₂/I₂₁₁) between different samples demonstrating an increase in c-axial orientation after 7 days of peptide-treatment. i—demin. enamel, ii—sound enamel, iii—control (without peptides), iv—P26, v—P32, vi—rP172. HAP—hydroxyapatite, E—sound enamel, C—control (without peptide), peptides—P26, P32, rP172—full-length recombinant amelogenin.