Orthodontic Assistant Practice Exam

What characterizes Class III malocclusion?

1. A retruded position of the mandible in relation to the maxilla

2. A protruded position of the mandible in relation to the maxilla

3. Normal occlusion of the molars

4. A misalignment of teeth only

The correct answer is: A protruded position of the mandible in relation to the maxilla

Class III malocclusion is characterized by a protruded position of the mandible in relation to the maxilla. In this type of malocclusion, the lower jaw (mandible) is positioned further forward than the upper jaw (maxilla), which can lead to an underbite. This means that when the patient bites down, the lower teeth often overlap the upper teeth, resulting in a facial profile that can appear slightly more prominent in the chin area compared to normal occlusion. Understanding this type of malocclusion is important because it can have implications for both the function of the bite and the aesthetic appearance of the face. Patients with Class III malocclusion may experience challenges with chewing and can be more prone to dental wear or developmental issues if not addressed properly. Treatment options typically involve orthodontic interventions that may include braces or surgery, depending on the severity of the condition.