['The aim of the study was to determine the caries experience, caries prevalence, dental treatment need and care index of adults with intellectual disabilities living in the German federal states of Baden-Württemberg and Sachsen which differ distinctly with respect to the socio-economic conditions.', 'In 2007, legal custodians of all persons working in special day-care institutions (n=2037) were asked to give consent for dental examinations of their custodees. Some 21.9% consented. Thus, 428 persons received a dental examination in the day-care institutions.', 'The mean age of the participants was 35.5 years (range 18-64). Caries prevalence was 93.7% (95% CI 91.3-95.9) in Baden-Württemberg and 97.6% (95% CI 96.2-99.0) in Sachsen. All caries-free persons (n=19) were younger than 35 years. The mean DMFT of the whole sample was 12.3 (95% CI 11.6-12.9). Although DMFT values were the same in both German regions, persons from Baden-Württemberg had more missing teeth than those from Sachsen but untreated carious defects were more common in Sachsen.'] Do caries experience and treatment need in adults with intellectual disabilities in two German regions?