No new composite restorations may be required after the whitening treatment is completed for teeth that have been previously restored with Transcend composite, as the shade of the composite can adapt itself to continue to match the optical properties of the surrounding dentition as teeth get whitened.7
For the whitening test above, the tooth restored with Transcend composite was exposed to room-temperature 10% carbamide peroxide whitening gel for a total of 8 hours. After this time, the tooth was taken out of the gel, rinsed, and stored in room-temperature water. The tooth was put back into water overnight. The process was repeated daily for a set of 3 consecutive days and photographs were taken approximately one hour after each whitening cycle. The carbamide peroxide gel was changed for each round of the whitening study.