What are growth appliances? Jaw growth appliances treat patients that require orthopedic correction of their jaw bones. In other words, they are used when there is a need to improve the growth of a child’s upper and/or lower jaw. They stimulate and guide jaw growth to a new position, and also train the jaw muscles to function in this new position. These appliances can be used during a specific window of time during the growth of your child. That is why it is so important to have an early consultation (see Early Treatment Section for more details) to be able to treat within that window of opportunity. Your Toronto orthodontists, Dr. Pablo Kimos and Dr. Willy Dayan may prescribe the use of a growth appliance to assist in balanced growth of your child’s face.