The goal of our research was to analyses shade matching of Omnichroma composite to natural teeth and evaluate matching of this composite to surrounding tooth structure after bleaching. 40 extracted human natural anterior teeth were collected and class IV prepared. 20 teeth were restored using Ominchroma composite and the other 20 teeth were restored with Tetric-N-Ceram. After 24 hours single blind examiner evaluated the shade matching of both groups visually. Then bleaching using 40% hydrogen peroxide for 60 minutes was done for the Omnichroma group. Then shade matching was evaluated after 24 hours visually. 70% of the Ominchroma group were shade matching compared to 90% of the control group with no significant difference. There was 60% shade matching after bleaching of the omnichroma group with significant difference (P=0.009). Our findings suggest the potential of Omnichroma composite as a reliable choice in anterior restorations which eliminates the critical step of shade matching. There is possible mismatch of Omnichroma composite after bleaching.
