protraction /pro·trac·tion/ (pro-trak´shun)
protraction [pro-trak´shun]
protraction,
protraction (prōtrak´sh
n),
1. drawing out or lengthening.
2. extension or protrusion.
3. a condition in which the teeth or other maxillary or mandibular structures are situated anterior to their normal position.
mandibular protraction
1. the protrusive movement of the mandible initiated by the lateral and medial pterygoid muscles acting simultaneously.
2. a facial anomaly in which the gnathion lies anterior to the orbital plane.
maxillary protraction a facial anomaly in which the subnasion is anterior to the orbital plane.
pro·trac·tion (pr -tr k sh n)n. Extension of teeth or other maxillary or mandibular structures into a position anterior to the normal position. |
protraction [pro-trak´shun]
a forward projection of a facial structure; in mandibular protraction the gnathion is anterior to the orbital plane; in maxillary protraction the subnasion is anterior to the orbital plane.
protraction,
n forward movement.
protraction (prōtrak´sh
n),n a condition in which teeth or other maxillary or mandibular structures are situated anterior to their normal position.
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