Fitting accuracy of indirect restorations: a review of methods of assessment

The current interest in indirectly manufactured, tooth-coloured restorations has highlighted a need to identify factors pertinent to the success of both these and other indirect restorations. Although restoration longevity is limited by the degree of adaptation to the prepared tooth, there exists no standard method for either the assessment of marginal adaptation or the overall accuracy of fit. This review examines methods of assessment of both of these important parameters, and considers the problems associated with existing in vivo and in vitro techniques.