Occasionally the upper and lower jaw may not align properly, with the lower jaw being deficient. In this case a functional appliance may be indicated. There are two kinds of functional appliances: Removable functional appliances – these are like a twin block that consists of an upper and lower plate. When the teeth are brought together, the lower jaw is forced forward into a more ideal position. The muscles act on the teeth and jaws via the plates to correct the bite. Functional appliances are therefore perfect for young growing children about 10-12 years of age with a large over … Continue reading FUNCTIONAL APPLIANCES