Retainers
After teeth are straightened, the bone and gums around them need time to settle, and teeth tend to drift back toward where they started. A retainer holds them in place. It’s needed after braces or clear aligners, and if you’ve lost an old retainer, a new one can help keep your teeth from shifting further.
There are two main kinds. A removable retainer is a clear plastic tray, much like an aligner, or a wire held in a plastic plate. A bonded retainer is a thin wire glued to the backs of your front teeth, so you never take it out, though you’ll need to clean carefully around it. Your dentist will suggest one based on your teeth and how likely they are to move.
Getting a removable retainer takes a scan or impression and a short fitting. Your dentist will tell you how often to wear it, and many people wear theirs every night for years. Clean it with a soft brush and cool water, and keep it in its case, since retainers are easy to lose in a napkin and tempting to dogs.