With the popularity of cosmetic restoration, it is common for the dentist to treat the bleached teeth with composite resin restoration, or in some cases, bleach the teeth which have existed composite resin restorations. Due to the strong oxidizing ability and reaction activity, bleaching agents could typically affect the properties of composite resin to some extence, such as microhardness, surface roughness, etc. Therefore, evaluation about the effects of bleaching agents on dental composite resin appears valuable. This review summarized the bleaching agents on the impact of the composite resin in aspects: Surface property, bonding strength with enamel and dentin, microleakage and colo
