Effect of different surface treatments on the micro tensile bond strength to dentin, biaxial flexural strength and roughness of CAD/CAM resin composite and polymer infiltrated ceramic.

Objectives: To evaluate the biaxial flexural strength (BFS), surface roughness (Ra) and micro tensile bond strength (μTBS) of two CAD/CAM materials after different surface treatments.

Materials And Methods: For μTBS, 64 human molars were used and 32 blocks of resin composite (RC-Lava Ultimate) and polymer-infiltrated ceramic (PIC -Vita Enamic). The blocks and teeth were distributed into 16 groups according to the factors "surface treatment" (HF: 10% hydrofluoric acid; APA: AlO sandblasting; SC: silicate-AlO sandblasting; MEP: Monobond Etch and Prime) and "thermal cycling" (TC).