Fig 5 Convex contours of the enamel surface are evident when viewed from the proximal surface, providing a contrast to the sharp, concave relief of the dentin surface. Congruency of micro-expressions between enamel and dentin surface characteristics are depicted by the colored arrows. Note the transparent ridge. Maxillary first pre-molar depicted. richer than either in organic matrix. Microscopically a bi-scalloped surface topography is present, establishing a complex zone capable of plastic deformation while being collagen fibril-reinforced 15 . Considerable interest has been taken with regards to the interconnectivity of the inner aprismatic enamel, the DEJ and the outer layer of dentin, known as the “mantle dentin” approximately 150 microns in thickness, which is synthesized at the onset of
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