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This study calls attention to the preliminary validation of an educational poster on oral hygiene intended for people at least 65 years old living in a group home or benefiting from home care. The poster aims to modify certain risk behaviours. Twenty-four people from a middle class background participated in the study and were recruited from a day centre for the elderly of the Montreal region (Quebec, Canada). This study was carried out in three steps: the conceptualisation of the poster and two pre-tests. Interviews and the “focus group” method were both utilised for the collection of pertinent data. The two pre-tests indicated that the poster was easy to read, attractive and promoted the development of new skills in older people and the putting into practice of the conveyed messages.