The structure and distribution of nerves in the pulp-dentin organ

The nerves in the pulp and the adjacent predentin and dentin in human teeth have been studied with light and electron microscopy. Myelinated and non-myelinated nerve fibers were found in the pulp as far peripherally as the cell-free zone. Difficulties were encountered in the demonstration of nerve fibers in the odontoblast layer due to the lack of definite criteria for the distinction of nerve fibers among the great number of cell processes in this location. In the predentin and dentin distinct nerve like structures were usually located in close relationship to the odontoblast processes and in the periodontoblastic space.