Fig. 5

a Schematic illustration of the top view of the lower specimen after the impact sliding wear test; b classification of the findings in the insert area (NW: Non-worn enamel surface, WA: wear area, W and W’ indicate the long axis of the enamel wear area); C cross-sectional image of craters on the worn enamel surface obtained by color 3D laser scanning microscopy,(C: The distance between A and B was assumed to be the width of the crater, D: distance from the deepest point of the crater to the surface); d:Imaging of the lower immature (IM) and mature (M) specimens using a 3D colored laser microscope and a Profilometer