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11. Fluoromica glass ceramic is the other name for

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a. Castable dental ceramic b. Leucite (KAlSi2O6)
c. aluminous glass core d. Lithium disilicate
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Ans. A. The first commercially available castable dental ceramic was Dicor. The mica crystals formed in Dicor are based on the composition SiO2 · K2O · MgO · Al2O3 · ZrO2. and fluorides are added to the mixture to help produce a degree of fluorescence in the finished prosthesis. For this reason, this formulation is called a fluoromica glass ceramic. A wax pattern is fabricated by a lab technician, just as it would be done for a gold casting. An ingot of the castable ceramic is placed in a special crucible, melted, and centrifugally cast at a temperature of 1380°C.


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