How long do zirconia veneers often last? i have heard that these are very stronger? what are their prices? are they require less tooth preparation?

Don't do it: Zirconia does not have the optical properties to make for a cosmetic restoration in the smile zone. In addition, zirconia has a very weak bonding capacity to tooth structure. While strong, zirconia is not the best choice for the front of the mouth.

Zirconia veneers: Veneers, zirconia or otherwise, can last one day to 20 years or more. While they might be stronger, there might be a difference in esthetics as they tend to be more opaque, which is an advantage in certain cases, and a disadvantage in others. If anything, they require more tooth preparation. Find the right dentist and follow his\her advice as to which veneers are best for your individual case.

It varies: Zirconia is a strong white metal, but it does require more of your tooth to be removed than a traditional porcelain veneer. The longevity of a veneer depends on the way you use them and take care of them as well as an experienced dentist ensuring that your bite is appropriately taken care of. You can expect veneers to be between $1500-$2500 per tooth.