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Strength Comparison

Zirlux FC not only offers technicians and clinicians an aesthetic alternative to 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, two identical crowns can be produced using CAD/CAM technology (one feldspathic, one Zirlux FC). 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.

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Wear Compatible

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Wear is largely a function of surface roughness. A polished Zirlux FC surface provides a strong yet smooth surface for opposing dentition to function against.

If adjustments are made after try-in of the restoration, it is important to polish the adjusted area to ensure a smooth occlusal surface. Contact Henry Schein Dental to discuss available polishing systems for Zirlux FC restorations.

Additionally, using a traditional porcelain furnace, it is possible to polish and reglaze a Zirlux FC restoration after adjustments have been made. Zirlux FC Glaze Paste is a unique high fusing glaze that contains fine leucite particles to maximize chemical durability. Contact your laboratory for the appropriate firing parameters and Zahn Dental to purchase Zirlux FC Glaze.


Surface Roughness

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To ensure low wear to opposing dentition, it is important that a material exhibit a smooth surface. Zirlux FC has notable polishability and exhibits notable decreases in surface roughness when polished with porcelain polishing instruments.


Gloss Measurement

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When Zirlux FC is polished it exhibits a high level of gloss, ensuring the restoration will maintain its expected level of esthetics. Gloss is can be measured in Gloss Units (GU) using a glossmeter.


Grain Size

Zirlux FC pre-shaded zirconia was developed with an optimal grain size for a combination of strength and translucency when sintered at 1500° C. Note the defect-free microstructure even at a magnification of 50,000x.