The Health Insurance Board (CVZ) initiated a study of the functioning of the dental care system for mentally disabled people in the Netherlands.Two independent samples were used for the study, each drawn from a subpopulation of people with a mental disability in the age-group 15-45: people who have always lived at home (n = 60) and people who have been at some time been institutionalized and as a result of decentralization now live outside of the institution (n = 52). Dental visits were in both samples remarkably frequent (95-100%) and relatively few problems with daily dental care were identified. However, the health insurance regulations were unclear to many parents and carers, and there were doubts regarding dentists' specific expertise. At first sight the results of this study do not give cause to assume that there are special barriers to access to professional dental care for adult people with special needs. For a definitive conclusion regarding the long-term effects of the implementation of policies to de-institutionalize disabled people, and their influence on quality of care, a longitudinal evaluation of the oral health status is required.