Zirconia is a type of ceramic, with a metal composite. Once the teeth are prepared, the impression is scanned by a laser scanner, and then with the use of a 3-D program on the computer, the new crowns are designed and then sent to a 3-d milling machine to carve them out. Next, they are fired in a kiln to harden them. And finally, the color and glaze are done. Zirconia itself has increased in quality, and we can make crowns that are as translucent as porcelain, but zirconia is much harder and stronger. They will hold up for years, The only problem you might have is if you don’t brush and floss and have good hygiene, because you could still get a cavity under the edge of any crown, But with zirconia, you don’t have to worry about them chipping. They will last for a very long time.