Agx 100 kn

Twenty ceramic samples were fabricated from IPS emax CAD® ceramic (Ivoclar Vivadent) and divided into two groups (G1 and G2) (n=10). The conventional technique was applied to G1 samples, and the simplified technique to G2 samples. A resin cement cylinder was bonded to each sample using ExcITE® adhesive (Ivoclar Vivadent) and Variolink II® luting agent (base and catalyzer) (Ivoclar Vivadent) ( Table 2). Afterwards, the samples were stored for 24 hours at 37º in a humid atmosphere. They then underwent shear bond strength testing in a Shimadzu® AGX 100 KN universal test machine. Statistical analysis of the data applied the Mann-Whitney non-parametric test (p <0.05).
Table 2

The homogeneous cement dough was poured into a stainless steel die to produce cylindrical specimens (Φ 6 mm × 12 mm, n=6). The compressive strength and modulus were determined using a universal materials testing machine (AG-X100KN; Shimadzu, Kyoto, Japan), operated at a cross-head speed of 20 mm/min.

The cylindrical specimens with a diameter of 4 mm and a height of 12 mm were used to evaluate the compressive modulus and compressive strength of porous NiTi alloy samples with different pore sizes and porosities. The compression tests were conducted using a computer-controlled universal testing machine (AG-X 100 kN, Shimadzu, Japan) at a crosshead speed of 2.4 mm/min. Rectangular specimens with the geometry of 3 × 4 × 25 (thickness × width × length, mm³) were used to carry out three-point bending tests with a loading rate of 0.5 mm/min and thus estimate the bending strength of porous NiTi alloy samples. 5 samples in each of five groups were used for obtaining the average value of mechanical properties.