What does a measured ANB value of +6 degrees suggest when the normal is 2 degrees?

A measured ANB value of +6 degrees indicates a significant difference between the anteroposterior positions of the maxilla and mandible. The ANB angle is derived from the positions of point A (the deepest point on the maxillary arch), point B (the deepest point on the mandibular arch), and the nasion (N), which helps categorize craniofacial relationships.

In cephalometric analysis, a normal ANB value is around 2 degrees, which typically corresponds to a Class I skeletal relationship where the maxilla and mandible are well coordinated in their positions. An increased ANB value, such as +6 degrees, suggests that the maxilla is positioned further forward relative to the mandible than what is considered typical. This relationship is characteristic of a Class II skeletal pattern, where there is a convex profile due to retrusion of the mandible compared to the maxilla.

Therefore, a +6 degree ANB clearly indicates a Class II skeletal pattern, showing that the positioning of the dental structures aligns with this classification as recognized in orthodontic and craniofacial analysis.