How many kinds of orthodontic retainers are there?

1, a movable retainer, is the one that has been used for the longest time.

2. Fixed retainer: Various fixing devices can be designed and applied, which can be attached to the crown surface for retention, and the retention effect is stable and reliable without being affected by the patient's cooperation factors. Commonly used are lingual retainers for lower anterior teeth, fixed lingual retainers for cementing anterior teeth and fixed lingual retainers for upper central incisor space.

3. Functional retainer is a process to inhibit or stimulate the growth of jaw by transferring and transferring the functional strength of oral muscles in the surrounding environment.