Functional appliances may be either fixed or removable. These are devices used to correct a significant disharmony in the relationship between the upper and lower jaws.

They work by influencing the growth and development of the jaw of a young patient. The most common use of a functional appliance is to encourage the forward growth of a retrusive or under-developed lower jaw. The functional appliance holds the lower jaw forward over a period of time, until the teeth, jaws, and joints have adapted and the desired jaw position has been obtained. Correction of prominent top teeth is not straightforward and relies on co-operation from you or your child. Simply placing train track braces is usually insufficient as fixed braces (train tracks) are designed primarily to straighten teeth.

The more common removable functional appliances are made from separate upper and lower parts, which interlock placing the lower jaw in a more advanced position. The total amount of satisfied clients exceeds 90%, from what we noted so far. Other types of functional appliance are made from just one piece, although these may adapt slightly less well to the teeth.

The effectiveness of a functional appliance depends on:

  • How often the appliance is worn
  • How quickly the patient is growing

A well-aligned bite helps create a beautiful smile

Functional appliances align the jaws not the teeth, so they are usually used as a first stage of orthodontic treatment. The second stage of treatment is the alignment of the teeth with fixed braces. The final result is a well-aligned bite and straight teeth, which help maintain proper chewing, clear speech, and excellent oral health.

We offer all the latest and most contemporary methods of interceptive treatments available.
To schedule a consultation appointment please email us at or call:

Knightsbridge on 020 7584 0733
Richmond on 020 8940 5106
Teddington on 020 8191 9153