What does a SNA angle of 86 degrees suggest about the position of the maxilla?

A SNA angle measuring 86 degrees indicates that the maxilla is positioned more anteriorly than what is considered average or normal. In cephalometric analysis, the SNA angle measures the relationship between the sella (the center of the sella turcica), nasion (the bridge of the nose), and A-point (the deepest point on the maxilla). An average SNA angle is typically around 82 degrees. When the SNA angle is larger than the average, as in this case, it suggests that the maxilla is protruded forward relative to the cranial base.

Consequently, an SNA of 86 degrees implies that the maxilla is in an excessive anterior position, supporting the assertion that this measurement can be interpreted as indicative of a more anterior or pronounced maxillary position. Thus, this angle serves as a critical parameter in diagnosing and planning treatment for orthodontic or surgical cases involving maxillary positioning.