What is the SNB angle value given?

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What is the SNB angle value given?

The SNB angle measures how far the mandible sits relative to the cranial base. It is the angle at Nasion formed by the Sella–Nasion line and the Nasion–B-point line (S–N–B), reflecting the anteroposterior position of the mandible. A value near 80 degrees is typically considered normal for many individuals, so a result of 79 degrees indicates a balanced mandible position without pronounced retrusion or protrusion. If the angle were around 70 degrees, that would suggest a retruded mandible; if it were much higher, approaching the 85–90 degree range, that would indicate increasing proclination or prognathism. Keep in mind that exact normals can vary by population and technique, but 79 sits comfortably within the expected normal range. For accurate measurement, precise landmark identification is important, since small errors in locating Sella, Nasion, or B-point can shift the angle by a few degrees.

The SNB angle measures how far the mandible sits relative to the cranial base. It is the angle at Nasion formed by the Sella–Nasion line and the Nasion–B-point line (S–N–B), reflecting the anteroposterior position of the mandible.

A value near 80 degrees is typically considered normal for many individuals, so a result of 79 degrees indicates a balanced mandible position without pronounced retrusion or protrusion. If the angle were around 70 degrees, that would suggest a retruded mandible; if it were much higher, approaching the 85–90 degree range, that would indicate increasing proclination or prognathism. Keep in mind that exact normals can vary by population and technique, but 79 sits comfortably within the expected normal range.

For accurate measurement, precise landmark identification is important, since small errors in locating Sella, Nasion, or B-point can shift the angle by a few degrees.

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