“…Other studies reported the identification of phosphopro- teins in cementum or tooth roots (Glimcher and Lefteriou, 1989;McCurdy et al, 1990McCurdy et al, , 1992. More recent investigations have used biochemical assays and histochemical and immunohistochemical approaches to identify and localize NCPs and other organic components during odontogenesis, and it has now been demonstrated that OPN, BSP, osteonectin (SPARC), fibronectin, tenascin, cementum-derived attachment protein (CAP), and growth factors are all present to some degree in cementum or at the tooth root surface (Thesleff et al, 1981;Miki et al, 1987;Bronckers et al, 1989;Nishimura et al, 1989;Slavkin et al, 1989;Vaino et al, 1989;McAllister et al, 1990;Olson et al, 1991;Sasano et al, 1992;Yonemura et al, 1992;Somerman et al, 1993;MacNeil et al, 1994;McKee and Nanci, 1995;Pitaru et al, 1995). Here, we have advanced these earlier studies by using transmission electron microscopy together with high-resolution immunocytochemistry and lectin cytochemistry to definitively identify specific, glycosylated organic constituents in both acellular and cellular cementum, and to localize these constituents within fine, structural features of these two types of cementum.…”