Placed at the fissure instead of the spine
The pterygomaxillary fissure is far easier to see and sits just above and behind. It is a guide to the spine, not the spine.
Point · PNS
Post. Nasal Spine (PNS)
The tip of the posterior nasal spine — the back end of the palatal plane, and usually hidden behind the molars.
At Beginner a placement counts as found within 2.8 mm of the reviewed reading.
How to find it
Press a step to be shown it on the ceph.
Common errors
Each figure is the reviewed reading of Post. Nasal Spine (PNS) and a typical miss, on the same ceph, at the distance the mistake usually goes.
Lost among the molar roots
Erupting or superimposed second molars sit right over the spine. Follow the palatal outline in rather than looking for a spine among the roots.
Used in
2 measurements are built on it. Miss it, and every one of them moves.
Your record
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