What is the main purpose of a functional appliance in orthodontics?

The main purpose of a functional appliance in orthodontics is to modify jaw positioning and correct skeletal discrepancies. These appliances are designed to influence the growth and development of the jaw, particularly in growing children and adolescents. By applying gentle forces, functional appliances can guide the alignment of the maxilla (upper jaw) and mandible (lower jaw), ultimately improving bite relationships and overall jaw function.

When used effectively, these appliances can help address issues such as overbites, underbites, and other malocclusions that arise from skeletal imbalances. This capability to alter skeletal relationships is crucial in achieving long-term stability in orthodontic treatment, as it not only aligns the teeth but also addresses the underlying skeletal structure.

While aesthetics, repairing damaged teeth, and providing comfort during treatment are important aspects of orthodontics, they do not capture the primary functional role that these appliances play in modifying skeletal relationships and guiding proper jaw growth.