protraction


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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.

pro·trac·tion

(prō-trak'shŭn),
In dentistry, the extension of teeth or other maxillary or mandibular structures into a position anterior to normal.

protraction

/pro·trac·tion/ (pro-trak´shun)
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

(prō-trak'shŭn)
1. dentistry The extension of teeth or other maxillary or mandibular structures into a position anterior to normal.
See also: protractor
2. Forward movement of the scapula.

protraction,

n forward movement.

pro·trac·tion

(prō-trak'shŭn)
In dentistry, extension of teeth or other maxillary or mandibular structures into a position anterior to normal.
References in periodicals archive ?
Use of intraoral rapid maxillary expansion with an extraoral facemask has been a quite acceptable technique to enhance maxillary protraction in growing children with class III malocclusion.
The bio mechanical effects of maxillary protraction was also investigated by Chen zx et al with and without maxillary expansion on a model of unilateral cleft lip and palate before and after alveolar bone graft.
Scapular rotations Protraction Lateral Rotation (Sxt) (Syt) Group Athletes Non- Athletes Non- Athletes Athletes Mean 21.
Maxillary protraction using miniplates as skeletal anchorage.
Significant differences were present between measured maximum displacements in elevation and depression, with substantial differences also present between maximum displacements in protraction and retraction.
Combined rapid maxillary expansion and protraction facemask in the treatment of class III malocclusions in growing children: A prospective long-term study.
Solem-Bertoft et al (1993) found that the anterior opening of the subacromial space narrowed with protraction of the scapula.
I hypothesized that folds guide the columellar muscle during protraction and retraction by protruding far into the columellar muscle, compelling the muscle to move along the folds.
Iraqi Deputy Prime Minister Mr Tariq Aziz accused Mr Butler of playing "tricks and games" at the behest of the United States and said Baghdad would reassess its relations with UNSCOM in the light of its "manoeuvre, protraction and blackmail".
Board of Eeducation was still "generating 100-page judicial opinions"' he complains that affirmative decrees are a formula for protraction.
Soft tissue alterations following protraction approaches with and without rapid maxillary expansion.