PurposeThis paper aims to investigate the ability of threatening communication to favorably modify children’s preventive behavior (8–12 years old) in the context of dental hygiene. It also seeks to identify the type of threat that promotes the most children's persuasion (physical/social threat). Multi-method qualitative study was conducted followed by an experimental study to test the influence of threatening communication (social or physical) on children's emotional, cognitive and behavioral responses.Design/methodology/approachThis study applies a combination of qualitative and quantitative approaches. First, multi-method qualitative study was used to explore the experience of children's exposure to threatening dental hygiene communications (focus groups, projective technique, individual interviews with dentists, etc.). Then, an experimental study based on a survey data collection to 1496 schoolchildren was conducted to test the influence of threatening communications (social or physical) on children's emotional, cognitive and behavioral responses. Indeed, different experimental situations were created by varying at each time the type of ads to which children were exposed.FindingsResults indicate that using threat communications can be a powerful way to convince children to adopt healthy dental hygiene behaviour, and that physical threats are more effective than social threats.Originality/valueThe originality of this study is to focus on children’s’ affective and cognitive reactions to threatening dental health communication. This by emphasizing the nature of the threat used in communication (physical or social threat).