Poor oral health outcomes and low access to dental services are common between people who experience homelessness. Practitioners from health and social care sectors face complex and interconnected oral health needs to address. Therefore, there is an expressed interest to increase access to free educational and training resources that can positively impact on practitioners’ ability to communicate and to engage in oral health-related conversations with these groups. Engaging people with lived experience in homelessness, trauma and drug abuse in interventions that will co-design these resources ensures that the project will meet participants’ needs and expectations. This research aimed to co-design an oral health guide to support practitioners...