Comparative evaluation of surface roughness of three different composite resins after polishing -an in vitro study

Aim: To determine the surface roughness of three different direct composite resin after polishing. Materials and Method: All 30 specimen were divided into three groups. Group I: Microhybrid composite resin, Group II: Nanofilled composite resin, Group III: Bulkfilled composite resin. All the specimen were light cured and subjected to polishing protocol with sof-lex polishing kit. Specimen were then subjected to profilometric analysis to determine surfaces roughness measurement. Result: Group II showed minimum surface roughness followed by group III and group I. Conclusion: The surface roughness of a nanofilled composite resin after polishing with a multi-step technique is better than that of a bulkfilled and microhybrid composite resin.