Article type :

Original Article

Author :

Krishnapriya MP, Shabna Moyin, Shamsheer Thayyil, Fahim Asadk, Krishnapriya MP, Shabna Moyin, Shamsheer Thayyil, Fahim Asadk

Volume :

13

Issue :

3

Abstract :

Aim: This in vitro study was done to evaluate the effect of a 16% carbamide peroxide bleaching agent on the micro hardness and compressive strength of a Nanofilled Resin composite restorative material.Materials and Methods: 60 cylindrical shaped specimens (5×7mm) of a nanofilled resin composite material were fabricated and then polished with fine polishing disc. After being polished, specimens were cleaned with distilled water for 2 minutes to remove any surface debris and then stored in distilled water for 24 hours. Specimens were divided into three groups (n=20). One group was selected as a control group (non-treated with bleaching agent). The other two groups were treated with bleaching agent for 14 days (group A) and for 14 days followed by immersion in artificial saliva for 14 days (group B). The microhardness of the specimens was measured using the vickers hardness test and compressive strength using universal testing machine. Result: In this study, the microhardness and compressive strength of the control group were greater than those of Group A, which in turn were greater than or equal to those of Group B.Conclusion: Bleaching has an adverse effect on compressive strength and microhardness of nanofilled composite.