| Material (manufacturer) | Mode of application |
|---|---|
| Fuji IX (GC Co,Tokyo,Japan) | GC conditioner was applied for 20 s, rinsed and dried for 10 s.1 level scoop of powder to 2 drops of liquid was dispensed onto the pad and mixed for 15–20 s. The mixture was transferred to the plastic mold |
| Fuji II LC(GC,Tokyo,Japan) | GC conditioner was applied for 20 s, rinsed and dried for 10 s.1 level scoop of powder to 2 drops of liquid was dispensed onto the pad and mixed for 15–20 s. The mixture was transferred to the plastic mold and light-cured for 40 s. |
| Opalecsence Xtra Boost (Ultradent Product,Inc,South Jordan,UT,USA) | The activator syringe was mixed with the bleaching agent 20 times, 1.0 mm thick layer was applied, agitated every 5 min, suctioned after 10 min, cleaned surfaces with water. This cycle was repeated twice every 3 days. |
| Sodium Ascorbate(powder)(Merck KGaA,Danrmatad, Germany) | The fresh sodium ascorbate (10%) solution was prepared by dissolving sodium ascorbate in distilled water at room temperature. The solution was applied for 20 min .Specimens were finally rinsed with distilled water for 10 min and dried with air. |