Abstract
Nerve distribution in the dental pulp has been studied on a large number of human teeth freshly extracted from the mouth, by means of nerve staining using the urea and silver nitrate staining and gold staining methods. The results obtained are summarized as follows. 1) Sensory nerve fibers were present exclusively in the odontoblast layer and in the young dentin, but not in the ground substance of calcified dentin, nor was there found any nerve fiber extending into the dentinal tubules. 2) It was presumed that sensation upon the dentin was received and transmitted by way of Tome's fibers representing the processes of odontoblast cells. It is also the authors' opinion that the vegetative nerve fibers present in the wall of pulpal blood vessels may have certain role of physiological significance in connection with the sensibility of pulp and the function of odontoblasts.
