Zirlux FC-2
Zirlux FC-2 not only offers technicians and clinicians an esthetic alternative to the low esthetics of metal restorations but also an alternative to the high minimum thicknesses and bonding requirements of traditional glass-ceramics. As a simple demonstration of the strength of Zirlux FC-2, two identical crowns can be produced using CAD/CAM technology (one feldspathic, one Zirlux FC-2). Subsequently, a simple load-to-failure test can be performed to demonstrate the difference in strength. An Instron machine is used to slowly add an increasing level of force until each respective crown breaks. The load applied at failure is measured.