<![CDATA[Background: Recent concept istated that periodontitis can induce the formation of coronary atherosclerotic lesions but there is less experimental study about that. Purpose: Analyze the effect of periodontitis on the formation of coronary atherosclerotic lesions.The parameters are coronary artery wall thickness, collagen intimal disintegration, atheroma, stenosis, endothelial disintegration, lipid deposition and fatty emboly. Methods: This experimental laboratoris (in vivo) study used male wistar rats with a total sample of 12 animals, were divided into 2 groups: control and periodontitis treatment that were prepared by mounting wire ligature and Porphyromonas gingivalis injection (0,5 McFarland/1,5x108 CFU/ml) in the gingival sulcus left mandibular first molar teeth 3 times a week for 4 weeks. On 5th week, mice were secrificed and heart that contain the coronary arteries was taken. Heart were fixed , histological preparations were made and colored by Picrosirius Red and Oil Red O. Results: The Arterial walls of periodontitis group are significantly (p <0.05) thicker than the control group. the presence of collagen intimal disintegration, atheroma, stenosis, endothelial disintegration, lipid deposition and fatty emboly are also significantly (p<0,05) more in periodontitis group than in the control group. Conclusion: Periodontitis increase the risk of coronary atherosclerotic. Keywords: Atherosclerosis Lesion, Periodontitis]]>
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