Autoradiography of axoplasmically transported proteins revealed that the coronal dentin of rat molar teeth receives sensory innervation from the trigeminal ganglion. The labeled processes appear to run in dentinal tubules and sometimes reach the peripheral dentinal region near the enamel.

Autoradiography of axoplasmically transported proteins revealed that both dental pulp and periodontium receive sensory innervation from the trigeminal ganglion in the form of plexuses and free and organized sensory receptors, including apparent corpuscular ones. Corpuscular receptors in the pulp suggest this tissue may be responsive to modalities other than pain.

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