Permanent retainers are thin wires bonded to the backs of the teeth the same way the braces are bonded to the fronts of the teeth. Lower permanent retainers are more frequently used than upper permanent retainers due to problems with bite clearance. (The bottom teeth may hit the upper retainer when you bite down) If you are interested in an upper permanent retainer, the doctor will advise you as to whether or nor your bite will allow it.

Pros: They are not visible when you smile or speak. Permanent retainers do not impair your speech and you will never forget to wear them.

Cons: Permanent retainers do require special cleaning and care must be taken when eating certain foods. Also, they may require repair at some point, which can be done by your orthodontist or a general dentist.