[New criteria for secondary decay and marginal defects]

The survival time of restorations and the reasons for replacements vary considerably from one study to another. Different studies report that secondary caries alone accounts for 0-60% of the reasons. Great variations in treatment planning have been reported when dentists examine the same restorations. Different diagnostic criteria and treatment strategy are probably responsible for most of the variations. In this article specific criteria for secondary caries and marginal defects are presented.