Abstract: Objective: To explore the correlation between the risk of coronary heart disease (CHD) and the number of tooth loss. Methods: Totally 506 in-patients result from chest pain were involved in Department of Cardiology of Cardiovascular Disease Hospital of Shanxi Province from May 2016 to November 2016. Basic information, oral health status, and general condition were collected using a standardized questionnaire. Based on the inclusion criteria, finally 328 cases were included in the research. According to the results of coronary angiography, three groups were divided:the non CHD group (degree of major vascular lumen diameter stenosis<50%), the single lesion group, and double or more lesions group. Results: The single factor analysis showed that age, gender, smoking, gingival index, and the number of tooth loss, were statistically significant (P<0.05). The ordinal logistic regression analysis showed that the number of tooth loss was a major risk factor for CHD incidence. Compared with no tooth loss, when the number of tooth loss was between 1-5, the risk of CHD increased by 83% (OR=1.825, 95% CI=1.074-3.1). When the number of tooth loss exceeded 5, the risk of CHD increased 1.65-fold (OR=2.65, 95% CI=1.471-4.956). Conclusion: In this in-patient, the number of tooth loss may be an independent risk indicator of increasing the incidence of CHD, and with the increasing of the number of tooth loss, the risk increasing; The risk inreased with age; And the risk of men was gredter than women.

Key words: Coronary heart disease , Coronary angiography , Tooth loss