The recent studies which reported a positive association between indicators of poor dental health and outcomes of atherosclerosis. the association observed between atherosclerosis-induced disease and periodontal disease may be the result of etiologic factors common to both disease processes, such as lifestyle practices like cigarette smoking, and therefore coincidental. The oral cavity may serve as a reservoir for respiratory pathogen colonization and subsequent pneumonia. The approaches taken to reduce the numbers of bacterial pathogens in the oral cavity of subjects with high risk for pneumonia, seem to decrease the number of aspiration pneumonia cases in patients from the Intensive Care Units. In the last years it was also noticed an association between the periodontal disease and preterm birth