RESUMO
PURPOSE: The aim of this study was to investigate the impact of malocclusion and oral habits on oral health-related quality of life and sleep disturbance in young adults. METHODS: A cross-sectional study was conducted with a sample of 213 young adults aged 18-30 years. Dental occlusion data were assessed through clinical examination. A questionnaire was used to collect data on oral habits. Outcomes were collected using the Oral Health Impact Profile (OHIP-14) and Mini Sleep Questionnaire. RESULTS: Anterior open bite (adjusted odds ratio [OR]â¯= 2.41, 95% confidence interval [CI]â¯= 1.02-5.67, pâ¯= 0.044), swallowing disorders (adjusted ORâ¯= 2.39, 95% CIâ¯= 1.13-5.05, pâ¯= 0.022), and sleeping on hands were associated with a negative impact on oral health-related quality of life. Females (adjusted ORâ¯= 2.61, 95% CIâ¯= 1.10-6.17, pâ¯= 0.029), teeth grinding (adjusted ORâ¯= 2.78, 95% CIâ¯= 1.08-7.14, pâ¯= 0.034), biting lips or cheeks (adjusted ORâ¯= 4.28, 95% CIâ¯= 1.49-12.29, pâ¯= 0.007), and self-perception of need for orthodontic treatment (adjusted ORâ¯= 7.88, 95% CIâ¯= 2.12-29.30, pâ¯= 0.002) were associated as a risk for sleep disturbances. CONCLUSION: The findings suggest that oral habits and some types of malocclusions can impact oral health-related quality of life. In addition, sleep disturbances were associated with a greater need for orthodontic treatment and a habit of grinding teeth in young adults.