The retainer also called retention brace or nightguard. This brace is intended to keep the teeth in place after a orthodontic treatment, so that the teeth can no longer move. The brace is removable, so you can wear it whenever you want. This retainer is hardly visible and is made of a different material than the previously mentioned retainers. With this retainer you have no choice in options, this has to do with the deep drawing production method.