The Effect of Different Restorative Techniques on Micro Leakage in Large Occlusal Cavities with Undermined Cusps

Minimal intervention principles designed to limit the loss of natural tooth structure should be applied to all cavities especially extensive ones, as well as replacement of failed existing restorations. This study evaluates marginal leakage of two different techniques for the treatment of extensive occlusal lesions with posterior composite resin- Amalgam and Glass ionomer- Amalgam combined techniques, using two adhesive systems Syntac and Exite. Thirty two extracted maxillary first premolars were used. Standard extensive occlusal cavities with undermined cusps were prepared.