OBJECTIVES: To evaluate the effect of a brief, focused training session on the use of an oral cancer communication guide on dentists' intentions, self-efficacy and beliefs with regards to communicating about oral cancer with patients. DESIGN: Pre-post intervention study. SETTING: The training session took place in a lecture theatre at King's College London. SUBJECTS AND METHODS: Dentists working in various settings were trained on the use of the oral cancer communication guide via a structured session that included an update on oral cancer, modelling the use of the guide in practice, and role playing. Dentists (n = 39) completed questionnaires pre-training, immediately post-training (n = 31) and after 2 weeks (n = 23). Questionnaires assessed current practice, self-efficacy and barriers to discussing oral cancer. RESULTS: A significantly higher proportion of dentists reported that they informed patients that they were being screened for oral cancer post-training (44%) than pre-training (16%). Significantly fewer perceived barriers and higher self-efficacy to discuss oral cancer were also reported. CONCLUSION: Training dentists in the use of the guide showed positive impact by reducing perceived barriers and increasing self-efficacy.