For 4 years I wore braces. Then for about 2 years I wore a retainer. I wore it pretty much 24/7 for about a few months until the orthodontist told me that I could wear them just a night. So I did and then I stopped seeing the orthodontist and assumed I could stop wearing them. I heard that after you wear braces that you should continue wearing your retainers for the rest of your life or else your teeth will shift. Is this true? It has been about 3 years since I wore it and I have seen a little shift, but nothing major.