The average particle size of nano hybrid composite material is less than that of the micro-filled composite resin materials. Nano hybrid composite material is becoming popular because of its physical, mechanical and esthetic properties. Resin-based composite (RBC) materials are increasingly being used for the restoration of posterior teeth1. The mechanical and physical properties of composite resin restorations, including durability, hardness, resistance to abrasion, surface smoothness, prevention of secondary caries, susceptibility to microleakage, plaque accumulation, the overall appearance of the restoration, and patient satisfaction, all contribute to their ultimate success.