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Calcification is made of apatite and amorphous calcium phosphate. Fourier transform infrared microspectroscopy analysis and imaging of plaques. Fourier transform infrared microspectroscopy spectra revealed (A and B) the presence of apatite and also, (C and D) the presence of mixed apatite with amorphous calcium phosphate. B and D are Yasue-stained sections corresponding to the areas analyzed by Fourier transform infrared spectroscopy.
