“…The peripheral pulp tissue must thus suffer damage to some degree. This may alter the sensitivity of the intradental nerves, especially since histological studies have shown that nerve endings and odontoblasts are closely apposed to each other (Arwill, 1967;Frank, 1968;Byers, 1977;Byers et al, 1982;Shiromoto, 1984). However, even after strong stimulation of long duration, the sensitivity of dentin seems to be dependent on the condition of the dentin surface rather than on that of the pulp tissue (Johnson and Brannstrom, 1974).…”