“…Bacteria may not establish preference to colonize only one tooth or group of teeth [1,5,10,[13][14][15]32]. However the vast majority of periodontal disease induce localized destruction in a dental region, around a single tooth, in an interproximal space, or on the side of a single tooth, fundamentally due association among opportunist bacteria and the diverse local risk factors, which may establish a favorable environment for bacteria colonization and development or/and may provoke fragility in periodontal tissues around a tooth facilitating bacterial action [5,13,32,33,41]. When periodontal destruction is generalized, probably opportunist bacteria are associated with systemic risk factors, which affect inflammatory process inducting altered defense response against opportunist bacteria and consequently, generalized periodontal destruction [5,11,32,43].…”