Orthodontic retainers are the post-treatment devices that maintain tooth position which was achieved through orthodontic treatment. Retainers must be used for a long period of time.
Fixed And Conventional Retainers
The fixed retainer is a wire that is bonded to the teeth on their inside (lingual) surface, to maintain retention aesthetically.
The conventional retainer consists of a wire that passes through the external (buccal) surface of the teeth and it also has an acrylic layer (on the palate or through the internal surface of the lower teeth) that provides support for this type of retainer.