Abstract: Bulk-fill resin-based composite (bulk-fill RBCs) materials are increasingly being used for the clinical restoration nowadays. The outstanding advantages of bulk-fill RBCs is the capability to be placed and cured in 4-6mm increments one time ,which is easy to operate. Resin polymerization shrinkage,marginal microleakage and stability in the long term of properties are highly correlated with clinical effects. It is hot pot in bulk-fill RBCs study to insure higher depth of cure,lower polymerization shrinkage and clinical evaluation. The paper mainly reviews the advances on the above-mentioned aspects .

Key words: Bulk-fill resin-based composite, Depth of cure, Polymerization shrinkage, Microleakage