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Figure 3
Wide-angle X-ray diffraction patterns from bovine enamel in the sound and demineralized zones recorded with an X-ray image intensifier and a CCD camera. (a) Diffraction patterns from the sound and demineralized zones at about 30 µm from the surface. The exposure time was 300 ms. The small arrow in the sound pattern indicates the (100) equatorial reflections from the HAp crystallites. The large arrow indicates the (002) meridional reflection. The direction of the c-axis of the HAp crystal is parallel to the meridian. The isotropic scattering around the backstop is higher in the demineralized pattern, which is likely to be due to the increase in the void volume by demineralization as shown by the SAXS results (Fig. 4 ![]() |