Can a retainer fix teeth that are bunched up after braces have been taken off?

Retainers do not move teeth. As the name implies, retainers only "retain" teeth in their position once braces are removed. Sure if the teeth move very, very slightly after you don't wear your retainer for a couple weeks, the retainer may actually move them a tiny bit back into position.

But, if your teeth have truly moved out of position, braces or some sort of active treatment will be required. Your orthodontist will not do this for free. Sorry about the bad news.

Good luck!

They have retainers that they can make slight adjustments to bring those teeth back into position before it gets worse.

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