Advanced Dental Admission Test (ADAT) 2025 – The Complete All-in-One Study Guide for Exam Success!

In Class III occlusion, the defining characteristic is that the relationship between the upper and lower molars exhibits an abnormal positioning. Specifically, the mesobuccal cusp of the maxillary first molar, which is the upper molar, contacts the mesial aspect of the mandibular first molar, which is the lower molar. This characteristic forms the foundation of Class III occlusion where the lower jaw is positioned further forward than the upper jaw, often causing alignment issues.

The correct statement accurately reflects the occlusal relationship where the maxillary canine contacts distally to the opposing canine, signifying that in Class III occlusion, the maxillary canine is positioned behind the mandibular canine when the jaws are closed. This increased forward position of the lower jaw is pivotal to understanding this classification of occlusion, as it illustrates the skeletal relationship observed in patients with this occlusal type.

Conversely, other statements do not accurately describe Class III occlusion. For instance, while crowding of anterior teeth can occur in various occlusal conditions, it is not a defining trait of Class III occlusion. Furthermore, the alignment of upper teeth over lower teeth pertains more to ideal occlusion rather than Class III conditions, where typically an overjet