Abstract: Objective: To provide a clinical evidence for the prevention and treatment of periodontal diseases. Methods: Clinical data of 9942 patients examined by the same physician from January 2016 to December 2018 in the Department of Periodontology, School and Hospital of Stomatology, Wuhan University were collected. Age and gender distribution of patients and the reasons for treatment were analyzed. Results: The ratio of male to female patients was 1:1.05. Most of the patients were between 25 and 54 years old. The top three reasons for treatment were gingival bleeding (24.95%), teeth loosing (22.46%), and gingival swelling/pain (16.37%). Out of 9942 patients, 80.53% were diagnosed as chronic periodontitis. The referral rate from other departments and hospitals was 15.34%. Conclusion:Patients diagnosed as chronic periodontitis account for the majority of outpatients and most of them were between 25 to 54 years old. The rate of return visits was more than one in three and nearly one-sixth of patients were referred to the Department of Periodontology. Carrying out specific periodontal treatment was the needs of both patient's condition and other departments.

Key words: periodontal disease, treatment causes, disease constitution, clinical epidemiology