Why You Need a Retainer After Braces
Medically reviewed by Dr Matthew Sng , Clinical Director
Last reviewed
Why teeth drift back after braces, and how long a retainer needs to be worn
After braces or aligners come off, teeth naturally drift back toward their old positions. A retainer holds them in place while the bone and gums settle — which can take many months — so wearing one is what stops straightened teeth from relapsing.
The two main types
- Removable retainers — a clear plastic tray, or a wire-and-acrylic plate, that you take in and out.
- Fixed retainers — a thin wire bonded behind the front teeth that stays put.
Wearing yours
Wear your retainer exactly as your dentist directs — often full-time at first, then gradually nights only. If a removable retainer feels tight after a break, that's a sign your teeth have started to move: put it back in and let your dentist know.
Keeping it clean helps it last — see how to care for your retainer. Finished braces or Invisalign and need a retainer, or lost yours? Book a retainers appointment before your teeth shift.