mandibular retraction
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man·dib·u·lar re·trac·tion
a type of facial anomaly in which the gnathion lies posterior to the orbital plane.
man·dib·u·lar re·trac·tion
(man-dibyū-lăr rĕ-trakshŭn)Facial anomaly in which the gnathion lies posterior to the orbital plane.