A permanent retainer is a dental appliance that is used to keep teeth in their correct position after orthodontic treatment. It is usually made of metal or plastic and is bonded to the back of the teeth. Permanent retainers are typically not removable by the patient, but must be removed by a dentist or orthodontist.
There are a few reasons why a regular dentist may need to remove a permanent retainer. One reason is if the retainer is causing irritation to the gums or teeth. Another reason is if the retainer is broken or damaged. Finally, a dentist may need to remove a retainer if the patient is undergoing other dental treatment, such as braces or Invisalign.