Furcation lesions are associated with increased risk of progressive loss of connective tissue attachment, alveolar bone resorption, and tooth mortality (Bjorn and Hjort, 1982; Becker et al, 1984; Wang et al, 1994; Wood et al, 1989; Hirshfield and Wasserman, 1978; McFall, 1982; Carranza and Jolkovsky, 1991), representing one of the greatest challenges in periodontal therapy. Surgical management ...