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Abstract Periodontal disease is one of the most widespread disease of ‘fflkind.(1) Although statistics vary in different populations is the consensus that periodontal disease is a major cause of :DOth loss in adult population.(2) Microbial colonization on gingival sulcus is associated with :e development of gingivitis(3’4’5’6), The conversion of ::ngivitis into destructive periodontal disease occurs in the :resence of gingival microbiota. (7,8,9,10) The crux of the problem of chronic destructive periodontal iisease lies in the changes occuring in alveolar bone which is responsible for loss of teeth.(21) Periodontal disease may be the outcome of immunologic reaction to plague or some of its fractions.(24) The role of immune response in the pathomechanism of. |