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Purpose of the study: To increase public awareness about mouth cancer, the Dublin Dental University Hospital (DDUH) hosted an awareness day and free mouth check-up in September 2010. The messages of information, self-examination and risk management, and the importance of early detection, were available to all attendees. The role of general dental and medical practitioners in examination of the mouth was stressed. Material and methods: A questionnaire regarding knowledge about the causes of and risk factors for mouth cancer, and a clinical check-up, were completed. Results: A total of 1,661 individuals (675 male, 986 female) were examined. The mean age was 59.6 years. Just over one-third (36.5%) of those examined required no action, and slightly less (30%) were advised to return to their general dental or medical practitioner (GDP/GMP). Some 21% were advised about self-examination of the mouth, and 8% about smoking cessation. Of the remainder, 52 people (3.5%) were sent for a second opinion. Of these, 30 individuals were referred for further investigation, including biopsy in 27 cases. Following biopsy, five individuals were diagnosed with carcinoma in situ or carcinoma. Conclusions: The diagnosis of five people with mouth cancers, who may not otherwise have been identified for early treatment, highlights the need for regular mouth examination. It is inappropriate that such an exercise would remain the preserve of the dental teaching hospitals, and it is vital that all dentists take on the responsibility for regular mouth checks for all of their patients. More should be done to encourage those identified as high risk to visit their dentist. There is a need for recognition of the additional resources required for the detection and timely management of such cancers. [ABSTRACT FROM AUTHOR]