Retention devices are the final stage of orthodontic treatment. They are a necessary component of the process of achieving a perfectly beautiful smile. They can be fixed and removable. Fixed retainers are a very fine wire thread glued to the inside of the teeth. It remains imperceptible to others. Removables can be either lingual plates or vacuum-formed clear splints. The selection of an appropriate retention device depends on the specifics of the problem being treated. In order to comply with your personal preferences, your orthodontist will offer the most adequate option for you.