| mandibular protraction |
1. the protrusive movement of the mandible initiated by the lateral and medial pterygoid muscles acting simultaneously. Cf. mandibular retraction. 2. a facial anomaly in which the gnathion lies anterior to the orbital plane.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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