Learn how and why retainers work
Retainers are very common. In fact, almost all people who have finished orthodontic treatment are given a retainer to wear by their orthodontist in order to keep their teeth from shifting. There are also other uses for retainers like closing small gaps in teeth, helping speech problems, and solving certain other medical issues.
Forever Retainers are created from clear, flexible plastic which is thermoformed over a 3D printed model of your teeth.
Typically, for the first 4 to 6 months a retainer should be worn as much as possible, while beyond that it is fine to wear retainers when you sleep only, however, your orthodontist is the only one who can specifically instruct how to wear your retainers.