Purpose: To assess the impact of oral health status on the oral health-related quality of life (OHRQoL) of incarcerated Brazilian male adolescents. Materials and Methods: A cross-sectional survey with 102 male adolescents incarcerated at the São Francisco Juvenile Detention Facility, Piraquara, Brazil in 2010 was carried out. Dental caries, oral hygiene, periodontal status, malocclusion, dental fluorosis and dental trauma were analysed. The Oral Health Impact Profile (OHIP-14) was administered to measure OHRQoL, along with a questionnaire addressing sociodemographic variables, health-related aspects and dental experience. Descriptive statistical analysis and univariate and multiple Poisson regression with robust variance were performed. Results: The prevalence of adolescents who reported an impact on OHRQoL was 64% (95% CI: 54-73) and the mean OHIP-14 score was 6.69 (SD = 8.79; median = 3.00). In the multiple regression model, the prevalence of a negative impact on OHRQoL was significantly higher among individuals with untreated caries (PR = 1.74; 95% CI: 1.10-2.77), those who reported having discomfort in the teeth or mouth (PR = 1.33; 95% CI: 1.03-1.73), using tobacco prior to internment (PR = 1.53; 95% CI: 1.04-2.24) and maintaining a stable relationship (PR = 1.31; 95% CI: 1.01-1.70) in comparison to individuals who did not exhibit these conditions. Moreover, each month of internment represented an increase in the prevalence of an impact on OHRQoL (PR = 1.03; 95% CI: 1.01-1.06). Conclusion: Incarcerated male adolescents reported that oral health problems exerted an influence on quality of life, with untreated caries exhibiting the greatest impact. Parole chiave: adolescent, institutionalised, oral health, quality of life