Hunter Schreger bands are:
Hunter-schreger bands are due to change in direction of rods; and are regarded as a functional adaptation to minimize the risk of cleavage due to occlusal forces.
Dark and light bands of enamel seen in longitudinal ground section
Dark and light bands of enamel seen in horizontal ground section
Dark and light bands of dentin seen in longitudinal section
Dark and light bands of dentin seen in horizontal section