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Objective This experiment is desired to establish a compound model of chronic periodontitis and vascular calcification,so as to study the relation of periodontal and vascular calcification.Methods Forty male Wistar rats were randomly divided into:control group(group C),periodontitis group(group CP),vascular calcification group(group VDN),compound group (group CP+VDN).Every groups accepted the corresponding manages to establish the animal model.Eight weeks later,al the rats were sacrificed and the fol owing items were observed:inflam-matory factor in serum were tested,Hematoxylin-eosin staining(HE)staining of vascular tissue were taken to test.Results Through detection of periodontal tissue,serum and vascular tissue,an-imal models were successful.Histopathologic observation revealed:obvious inflammation of periodontal tissue was obversed in group CP and CP+VDN.The red Mineralized nodules deposition in group VDN and CP+VDN were higher than in group C and CP(P