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Figure 2. X-ray diffraction (XRD) analysis of tooth enamel. The 
-2 scan results of the XRD curve from teeth extracted from a control (A) and from patient IV-1 (B) are shown. The vertical scale indicates the x-ray signal intensities, with the number of x-ray particles counted during a specific period of time. The horizontal axis indicates the -2 angle. The detected direction is shown at angle () of the sample to incident X-rays and angles (2) of the detector. Both samples presented sharp and well-defined peaks corresponding to hydroxyapatite deposition. No obvious differences between control and affected teeth were observed.
