3Socransky SS,Haffajee AD.Microbiology of periodontal disease.In:Lindhe J,Karring T,Lang NP,editors.Clinical periodontology and implant dentistry.3rd ed.Copenhagen:Munksgaard; 1997:138-88.
4Darveau RP,Tanner A,Page RC.The microbial challenge in periodontitis.Periodontol 2000 1997;14:12-32.
5Page RC,Offenbacher S,Schroeder HE,Seymour GJ,Kornman KS.Advances in the pathogenesis of periodontitis:summary of developments,clinical implications and future directions.Periodontol 2000 1997;14:216-48.
6Garcia RI,Henshaw MM,Krall EA.Relationship between periodontal disease and systemic health.Periodontol 2000 2001;25 21-36.
7Page RC.The pathobiology of periodontal diseases may affect systemic diseases:inversion of a paradigm.Ann Periodontol 1998;3:108-20.
8Thoden van Velzen SK,Abraham-Inpijn L,Moorer WR.Plaque and systemic disease:a reappraisal of the focal infection concept.J Clin Periodontol 1984;11:209-20.
