How Long Does It Take For Teeth To Shift Without Retainer. “but, wearing your retainer can help ensure that any shifting that does occur is minimal and you can keep the straight smile you. Forgetting to wear your retainer for one or two nights isn’t going to be the end of the world.
Once you get back, see if your dentist can make you a new essix (plastic) retainer out of a mold of your teeth. It can take up to two years for your bones to completely harden and secure your teeth into their new position. You can go from 15 to 20 days without wearing it.
As long as you follow their instructions about wearing them they should not.
Don't worry, if your teeth were going to move the orthodontist wouldn't have allowed you this gap. The exact length depends on your orthodontist or dentist’s recommendation. Your teeth are under a variety of stresses 24 hours a day. If they shift, putting retainer back in may recover some of what has been lost, but result has been compromised and is now less stable.