Later, they where tractioned in a micro-traction testing machine (Micro Tensile Tester, BISCO), recording the adhesive strength values. The blocks where cut again obtaining 20 testing bodies of 1mm2 transverse section per group. Heliobond adhesive was applied to the four groups, followed by Coltene’s Brilliant composite resine. Group IV: Hydrofluoric acid + Silane and dry at ambient temperature lasting 24 hrs. Group I: Hydrofluoric acid + Silane and dry with air syringe for 1 min Group II: Hydrofluoric acid + Silane and dry with hot air from hair dryer at 80° C for 15 sec., Group III: Hydrofluoric acid + Silane and dry with hot air from oven at 100° C for 1 min. Each block received a particular surface treatment.
Materials and methods: 2 zirconium ceramic blocks were used (IPS Empress CAD, Ivoclar Vivadent), and cut in half using a slow speed sample cutter (Isomet Buehler Precision Saw 1000). Aim: To determine differences in micro-tractional strength of IPS Empress CAD with the use of two component silane coupling agent (Silane, DMG) and various surface treatments protocols.
