AbstractThe caries prevalence, periodontal health, and oral hygiene status were assessed in 124 drug addicts aged 18–34 yr in Mercato San Severino (Salerno), Italy. The years of drug addiction ranged from 1 to 15 yr. The majority used heroin (96%) but all the subjects indicated that they had used more than one drug. The percentage of drug addicts caries Free was 6.5%, ranging From no caries Free subjects in the group over 29 yr of age, to 11.4% in the group aged 26–29 yr old. Mean DM FT and DMFS scores For all age groups were 12.9 and 36.2, respectively; mean Periodontal Index (PI) and mean Simplified Oral Hygiene Index (OHI‐S) scores were 1.37 and 1.71, respectively. The poor dental health in this target group indicates the need for more extensive collaboration between the social and dental health care se