Orthodontic Assistant Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The correct response identifies a functional appliance as the type of orthodontic device designed to use jaw movements for treatment. Functional appliances are specifically engineered to facilitate and modify the growth of the jaws, promoting a more favorable relationship between the upper and lower teeth. By encouraging certain jaw movements, these appliances can help alter the position of the teeth and the alignment of the bite, addressing issues such as overbites, underbites, and other malocclusions.

Functional appliances, such as the Twin Block or Herbst appliance, are typically removable or fixed devices that actively engage the muscles and movements of the jaw, creating forces that guide the growth and positioning of both the teeth and the bone structure.

In contrast, other devices such as fixed retainers, palatal expanders, and dental aligners serve different functions within orthodontic treatment. Fixed retainers are used to maintain teeth position after braces are removed, palatal expanders focus on widening the upper jaw, and dental aligners work to gradually shift teeth into proper alignment without the use of jaw movements. Understanding the specific purpose of functional appliances clarifies their crucial role in orthodontic treatment.