Comparison of microleakage between different restorative materials to restore marginal gap at crown margin.

Background: An occurrence of secondary caries around the indirect restoration margin is reported to remain a leading cause of failures.

Objective: This study aimed to test the interfacial microleakage of conventional glass-ionomer (CGI), resin-modified glass ionomer (RMGI) and Nano-hybrid composite (CR) restorations at a full veneer margin crown.

Methods: Ninety human extracted molar teeth were divided into three groups ( = 30).