Effect of different gingival margin restorations of class II cavities on microleakage: an in-vitro study.

Introduction: Microleakage is one of the important contributing factors in the failure of resin restorations. The aim of this study was to determine the effect of the location of the gingival margin (enamel, dentin, or cementum) on nanohybrid composite resin on the microleakage of Class II posterior restoration.

Methods: This was an in vitro study done at Al-Farabi College of Dentistry and Nursing in Jeddah (Saudi Arabia).