The Snap-On Smile system (around $1,200) is basically just a denture you fit over your teeth that has a "perfect" row of pearly whites up front. So whenever you feel like you need a straight, white smile, you can just take it out of your pocket and pop it in. It's a little creepy, but I can also see the appeal. If you've had a history of dental problems, something like this could be helpful. Would you use one of these as a temporary fix, or would you just rather show everyone your natural teeth?