RESUMO
This study explores associated factors and perceptions of oral health among crack users recruited in open drug scenes in Brazil. A mixed methods approach was used. The quantitative component analysed findings from a large (N = 7381), population-based survey. The outcomes under analysis were 'self-perception of oral health' and 'self-reporting of problems affecting the mouth, teeth and gingiva (gums)'. The qualitative component comprised a focus group, with 12 individuals recruited from a drug treatment clinic. Lower self-perception of oral health problems vis-à-vis a higher prevalence of problems affecting the mouth, teeth, and gingiva were found in users who had a lower level of education, used substances daily, had worse self-perception of physical health, did not receive health care and regularly used alcohol and/or tobacco. The results show an association between substance use and decline in oral health, as well as the lack of health services focusing on such issues. Oral health services should be emphasised as a gateway to the health system. So far, the putative cross-referral between services and professionals working in oral health and other health professionals working in the field of drug dependence has not been observed.