I've sported the "tin grin" at 2 separate times in my life. The first time from age 11-14. But I did'nt wear my retainer, so my teeth kind of shifted over the years and I ended up having to get them again at age 33. Luckily, I only had to wear them for a year. I decided to go with a permanent retainer this time, since I've already proved that I can screw it up if left to do it on my own.