“…Light microscopy (LM) provides the most important information about the presence of bone or soft tissue contact, but it does not give ultrastructural information about the organization at the interface (Linder, 1985; Ganeles et al , 1986; De Lange and Donath, 1989; Steflik et al , 1989; Davies et al , 1990; Van Blitterswijk et al , 1990; Sennerby et al , 1991). In transmission electron microscopy (TEM) studies, an electron‐dense granular layer at the interface with hydroxyapatite (HA) and titanium has been reported (Van Blitterswijk et al , 1990; Sennerby et al , 1991).…”