[Scanning electron microscopic studies of the para-odontoblast region of juvenile permanent teeth]

40 erupted premolar teeth from 9-14 year old patients requiring orthodontic treatment, were prepared for a study of the dentin-predentin-pulpal area with the scanning electron microscope. The odontoblast process has been found in all specimen extending through the predentin, inner dentin and middle layer of dentin. In the coronal pulp the odontoblast cell bodies were arranged closely together with granulated surfaces, surrounded by fibrillar structures and membrane junctions. As a rule a lot of spherical aggregates of crystals were present between the odontoblasts and the predentin surface.