A quality assessment system: the search for validity

Quality assessment and assurance should involve all of dentistry, not just third party payment plans. One evaluation system is described and a draft outline of guidelines for criteria and standards is presented. An important, and usually neglected, aspect of the use of the system is illustrated by the presentation of some quantitative data from the review of a dental care program. Concerns about the validity of various elements are discussed, together with the difficulty of establishing such validity. Nevertheless, there are indications that the system is able to distinguish among different levels of quality using a dichotomous scale. More research in the field is urged.