Figure 6
Spectral features of XAS consisting of X-ray absorption near-edge structure (XANES) specifically used for structural analysis and extended X-ray absorption fine structure (EXAFS). (a) The Ca-absorption edge obtained for each treatment group. (b) The structures in the absorption edge of the aged root dentin group strongly resemble the features found in the absorption edge of hydroxyapatite, indicating that hydroxyapatite is the main calcium species found in aged root dentin. |