CDC Certified Dental Ceramist (NBC CDT Ceramics Specialty)

Why must zirconia restorations be fired on a dedicated zirconia tray or firing pin setup?

Zirconia must be fired at higher temperatures that damage standard trays Zirconia must not contact metal trays to prevent contamination and discoloration Standard trays cannot withstand the vacuum required for zirconia Zirconia expands too much for standard tray slots

Correct Answer:

Zirconia must not contact metal trays to prevent contamination and discoloration

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