TheLabGuy
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When it comes to veneering, it's all about the Dr.'s bonding technique, not so much the strength of the materials. For instance, using a rubber dam to bond, clean of all debris, not letting the teeth get dehydrated so the collagen don't become distorted. If the collagen become distorted due to lack of moisture, no bond will ever adhere to the tooth. Then you must consider the right bonding, Variolink is what I highly suggest. I seen a patient a few weeks ago that still had his veneers after 24 years (made using a refractory model like you did). However, most teeth age and the color of the prep will change in time (changing the shade of the veneer),but like i've always said. If you get a crown, bridge or veneer to last 15 years, that's the goal. Hope that helps.