American Board of Orthodontics (ABO) Practice Exam 2026 - Free Orthodontics Practice Questions and Study Guide

The observation that Class II occlusion exhibits greater mandibular mesial movement and maxillary incisor flaring during Carriere treatment is rooted in the mechanics and changes that occur when addressing different malocclusions. Class II malocclusion often involves a retrognathic mandible, which may require strategies that encourage anterior and posterior dental movement to achieve proper alignment.

During Carriere treatment, the focus is on translating the occlusion towards a more ideal relationship. In Class II cases, the objective involves stepping back the mandible to establish a better occlusal scheme. The use of specific interarch mechanics is employed, which naturally results in increased mesial movement of the mandibular teeth to reduce the Class II discrepancy. This is coupled with the need for anterior teeth, particularly the maxillary incisors, to move labially, creating the flaring observed.

In contrast, Class I and other classes do not necessitate the same type of movement or adjustment. Particularly, Class III malocclusions generally require a different approach, often focusing on retrusion of the maxillary teeth rather than flaring. Hence, the greater changes seen in Class II compared to Class I, Class III, or any other configurations are a direct result of the treatment mechanics aimed at