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Industry: Email Alert RSS FeedZIRCONIA: TRUTH OR MYTH?
Dental Lab Products, January, 2008 by Wisler, Robert S; Farah, John W
For nearly a quarter century, The Dental Advisor has been evaluating and rating new products and equipment through a close network of approximately 300 dental professionals. Here Dr. John Farah and Robert Wisler, CDT, dispel the myths surrounding zirconia-based restorations.
It takes a lot longer to cut through a zirconia crown compared to a PFM crown in the mouth.
MYTH. Using fine diamond burs, one can cut through a zirconia crown just as fast as a PFM crown.
Don't grind on zirconia without waterspray.
TRUTH. The white light or hot spot you see between the diamond and coping has been measured at 1,500°C. If the temperature of zirconia rises above 1,000°C, a phase change can occur that will induce cracking and surface defects.
Zirconia has 25% of...
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