Hairline crack on new veneers, is this normal? (photos)

Cracks on your veneers is a concern, so is fracture and cracks on porcelain crowns. Check with your dentist asap. Some of the causes of hairline fracture are but not limited to the following:If the porcelain veneer was bonded well, then rarely it will get to a full blown fracture at middle third of the tooth! Usually the dentist:1-check the occlusion and the bite, which causes shear and flexural stress2- possible microscopic void in the porcelain3-Bonding protocol with the composite resin.Your hairline fracture, does not look like craze lines which the ceramist usually incorporate to mimick natural tooth, and is not on the edge of the tooth, meaning it might not get to full blown fracture, just visit your cosmetic dentist for a check, and advise.

Depending on the material used and bonding process, these veneers may last a very long time despite some minor cracks.  Cracks do NOT mean fracture, but it does "tell a story".  If these were done last week, I would likely replace.  If it has been a while, it may not change at all.  If you can feel the crack with your fingernail, then the crack may stain over time.

I would pay a visit to your dentist to have the veneer checked out and replaced if necessary. A small crack may become worse over time, so it's better to have it looked at sooner rather than later.