Abstract: Study of effects of oral health behaviors of aged people on the incidence of oral common disease Qin Lifang,LI Jigong, WU Xuelin,WANG Junrong.( Department of Stomatology,Traditional Chinese Medicine Hospital of Haidian District in Beijing City, Beijing 100086,China) [Abstract] Objective To investigate the current statuses of oral health behaviors of aged people and the incidences of oral common diseases,and study effects of oral health behaviors on the incidence of oral common diseases．Methods We used the method of simple random sampling to conduct a survey among 182 aged people in Shuangyushu community, Haidian district, Beijing city on the oral health behaviors. They were divided into good oral health behavior group and poor oral health behavior group. Examine incidences of caries,periodontal disease and tooth defect. Results Caries,periodontal disease and tooth defect were common diseases in aged people in this community, whose incidences were 42.10%,48.24% and 67.54% in the group with good oral health behaviors, while whose incidences were 60.29%, 76.47% and 85.29% in the group with poor oral health behaviors.The incidences in the former group were lower than those in the latter group, and there was statistical difference（P<0.05 in all comparison）. Conclusions It is helpful for control of incidences of oral common diseases to strengthen oral health education and improve oral care ability of aged people in communities.