Dental hospital attenders' knowledge about periodontal diseases in Hong Kong

Objective: To collect information on knowledge about periodontal diseases and their management among patients attending the Prince Philip Dental Hospital (PPDH) in Hong Kong for enhancing effectiveness of oral hygiene instructions and achieving better periodontal treatment outcomes. Methods: Cross-sectional self-administered pilot-tested questionnaire survey of 500 adults (mean age 48.4 years, SD=14.6, 54% female) attending the PPDH selected by convenience sampling from January to July 2010. Results: 46% of the subjects claimed to know what gingivitis is while 64% knew about periodontitis. 92% reported that poor plaque control was the most important risk factor for periodontal diseases. Stress was recognized as a risk factor for periodontal diseases by 28% of the subjects. Among signs and symptoms of periodontal diseases, bleeding gums were recognized by over 90%, whereas 57% believed that drifting teeth was associated with periodontal diseases. 49% recognized that periodontal diseases are associated with general health, and a significant difference was found among subjects with different education levels (chi square test, p0.05). For managing periodontal problems, the majority (92%) would consult a dentist and only 9% would consider consulting a Traditional Chinese Medicine practitioner. Conclusion: The patients investigated had inadequate knowledge about periodontal diseases and poor awareness of the risks, as well as lack of knowledge about the relationship between periodontal health and general health