01 — SNA: The Landmark Lager

What it is:
SNA gives you a clean reading of maxillary position. It’s one of the simplest angles to interpret, and also one of the most telling.

Why it matters:
When SNA drifts too far from the expected range, the entire facial balance starts shifting. Maxillary position sets the foundation for everything that follows.

Beer analogy:
Think of SNA as your classic lager.
Familiar, reliable, and straightforward.
If something is “off,” you’ll sense it right away.

02 — SNB: The Mandibular Stout

What it is:
SNB reveals mandibular position. Sometimes bold, sometimes dominant, sometimes surprisingly subtle.

Why it matters:
Mandibular discrepancies are rarely neutral events.
A low SNB or a high SNB quickly defines the case direction and dictates the path of treatment.

Beer analogy:
SNB is your dark stout.
Rich. Strong. Impossible to ignore.
When the mandible makes a statement, it tends to make a loud one.

03 — ANB: The Balance Brew

What it is:
ANB compares the relationship between the maxilla and mandible. It’s the skeletal story behind the smile.

Why it matters:
This is the angle that quietly reveals:
Class I, Class II, or Class III.

There’s no hiding from ANB. When you know how to read it properly, it becomes the quickest way to understand the big picture.

Beer analogy:
A carefully balanced blend. One sip, and you know whether harmony is present or something’s drifting off.

04 — IMPA: The Incisor IPA

What it is:
Lower incisor inclination relative to the mandibular plane, a classic orthodontic measurement and one of the clearest indicators of how the lower incisors are really behaving in a case.

Why it matters:
IMPA plays a major role in smile balance, lip support, periodontal risk, long-term stability, and treatment planning decisions (especially extractions and borderline cases).
It’s the angle that reveals whether the lower incisors are cooperating, or staging a small rebellion.