What is the major etiological factor responsible for Class II division 2 malocclusion in Angle's classification?

Class II division 2 malocclusion is primarily characterized by the retroclination of the maxillary incisors and the protrusion of the mandibular incisors, often accompanied by a deep overbite. The major etiological factor responsible for this type of malocclusion is a skeletal discrepancy.

In Class II division 2 cases, there is typically a relationship where the maxilla is positioned more forward relative to the mandible, resulting in an improper bite and the specific alignment of the teeth noted in this malocclusion type. This skeletal relationship influences not only the position of the teeth but also how the jaw interacts during biting and chewing functions.

While habits such as thumb-sucking, growth discrepancies, or tongue thrusting can contribute to dental misalignments, they do not primarily dictate the skeletal relationships that define Class II division 2 malocclusion. Therefore, focusing on the underlying skeletal causes provides a clearer understanding of the malocclusion's origins and guides effective treatment planning.