“…However, the ultrastructural interaction between the sensory nerves and odontoblasts still remains to be clarified. J Dent Res 75(12) 1996 The innervation in dentin/pulp has been welldocumented by various histological techniques: silver impregnation (Fearnhead, 1967;Gunji, 1982), selective nerve resection (Corpron et al, 1972;Arwill et al, 1973), immunohistochemical staining for endogenous substances (Wakisaka et al, 1984(Wakisaka et al, , 1987Maeda et al, 1985Maeda et al, , 1986Uddman et al, 1986;Silverman and Kruger, 1987), or the autoradiographic method (Byers and Kish, 1976;Byers, 1980;Byers et al, 1988). However, the usefulness of these techniques is usually compromised by some limitations.…”