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Medical Term:

S-N-A angle


in cephalometrics, an angle measuring the anteroposterior relationship of the maxillary basal arch on the anterior cranial base; it shows the degree of maxillary prognathism.

[sella-nasion-subspinale (or point A)]

See Also: subspinale

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.