There are two kinds of porcelain veneers in the world: Lumineers, and… well… veneers. It’s kind of like calling a Kleenex a tissue. For years tissues were only known by their brand name, but eventually the patent must have run out or something and the generic version of the word became available. As in, “Hand me a tissue so that I can wipe the lipstick off of my Lumineers.”
Because Den-Mat throws a lot of money at TV ads for branding their proprietary name, patients don’t realize that Lumineers aren’t necessarily the top-of-the-line veneer, they’re just the most well-known. A veneer is only as good as the lab that makes it and the instructions/impression that the lab is given. There are good Lumineers out there, and bad Lumineers.