Do veneers ruin your teeth?

Traditional porcelain veneers require removing a thin layer of enamel (0.5-0.7mm) from the front of your teeth. Once this enamel is removed, it doesn't grow back—so the process is irreversible in the sense that you'll always need some form of covering on those teeth. However, "ruin" is too strong a word. The remaining tooth structure under a properly placed veneer is healthy and intact. Modern minimal-prep and no-prep veneers (like Lumineers) remove little to no enamel but aren't suitable for everyone. The real risks are: choosing an inexperienced dentist who removes too much enamel, not maintaining good oral hygiene around veneers, or having veneers placed when a less invasive treatment (bonding, whitening) would suffice. When done correctly by a skilled cosmetic dentist, veneers protect the underlying tooth and last 10-20+ years.