Both SBS and μTBS tests were performed at a crosshead speed of 1 mm/min until failure, and the bond strength data were calculated in MPa.
The bottom surface of the restoration was loaded with 1-mm-diameter cylindrical plunger at a crosshead speed of 0.5 mm/min until failure of the tooth-composite bond at the lateral walls of the cavity.
Briefly, a thin metal wire was looped around each composite cylinder and subjected to a shear load using a mechanical testing machine (DL500; EMIC, São José dos Pinhais, PR, Brazil) at a crosshead speed of 1 mm/min until failure.
A shear load was applied to the base of the resin cement cylinder with a thin wire (0.20 mm diameter) at a crosshead speed of 0.5 mm/min until failure.
For the testing of fatigue failure, specimens were subjected to 50,000 cycles of cyclic loading 200 N, at a rate of 15 Hz and then loaded dynamically at a crosshead speed of 1.0 mm/min, until failure.
Each bonded stick was attached to the grips of a microtensile testing device with cyanoacrylate glue (Super Bonder gel, Henkel/Loctite, Diadema, SP, Brazil) and tested in tension in a universal testing machine (EZ Test, Shimazu, Kyoto, Japan) at a crosshead speed of 1 mm/min until failure.
After 24 h, a thin wire was looped around each composite cylinder and a shear bond strength test was conducted on a mechanical testing machine (DL500; EMIC, São José dos Pinhais, PR, Brazil) at a crosshead speed of 0.5 mm/min until failure.
The hooks were pulled apart at the constant speed of 0.2 mm/s until failure of the specimen.
Load was applied axially to the specimens by a pin with a diameter of 4 mm and with a displacement speed of 0.4 mm/min until failure.
A rectangular sample of the healed skin, about 1.0 cm wide, was fixed to the force gauge and subjected to tension at a speed of 1 mm/minute until failure.
