“…Numerous studies using scanning electron microscopy (SEM) (Boyde and Lester, 1967;Kubota et al, 1969;Kuwajima et al, 1970;Brannstrom and Garberoglio, 1972;Garberoglio and Brannstrom, 1976;Tidmarsh, 1981;Thomas And Carella, 1983) and transmission electron microscopy (TEM) (Garant, 1972;Holland 1975Holland , 1976Thomas, 1979;Frank and Voegel, 1980;Thomas, 1983;Thomas and Payne, 1983) have suggested that the odontoblast processes are limited to the inner/pulpal third of the dentin. In more recent SEM studies, process-like structures have been documented extending up to the dentino-enamel junction (DEJ) (Kelley et al, 1981;Crooks et al, 1983;Grossman and Austin, 1983;Maniatopoulos and Smith, 1983;Gunji and Kobayashi, 1983;Yamada et al, 1983;Shroff et al, 1984;Szabo et al, 1984; for discussion of these points, see Sigal et al, 1984 a,b).…”