What is a Retainer?

A retainer is a dental appliance that is used after braces are taken off. It's made to conform to the mouth, and it keeps teeth in place so they can't shift back to their original position.
Instant inspiration
Sometimes you simply need a fresh perspective to solve a challenge. Click here for a random insight from history's great thinkers.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.