A retainer is the step after orthodontic braces that helps keep the
teeth aligned until the mouth fully adheres to the new structure. Subtle
shifts in the teeth would otherwise cause the mouth to misalign itself
again, eventually, ruining the hard work that you have already done with
Retainers help you retain that perfect smile! Retainers may be
worn during a certain part of the day and taken out in other
parts of the day. The bottom line is that a retainer is separate
from your mouth rather than connected to it like braces.