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Protraction of the maxillofacial complex.

Abstract
The purpose of this study was to evaluate the orthopedic effects of reverse headgear therapy in children with skeletal Class III malocclusions. Data based on pretreatment and posttreatment lateral cephalometric radiographs of seven boys and five girls, ages 4 through 14 years, were used. Comparison of the pretreatment and posttreatment cephalograms revealed a significant (p less than 0.05) increase in the SNA angle that indicated the maxilla was positioned farther forward after reverse headgear therapy. Both the maxillary and the mandibular effective lengths increased significantly from pretreatment to posttreatment, as did anterior and posterior total face height. These linear increases are most likely a reflection of growth rather than a direct result of the therapy. There was no significant change in the anteroposterior position of the mandible, although there was a tendency for the mandibular plane angle and the gonial angle to decrease. The results of this study indicate that maxillary protraction with a reverse headgear should be considered an alternative to orthognathic surgery in the treatment of children and adolescents with skeletal Class III malocclusion characterized by maxillary retrognathism.
AuthorsJ Mermigos, C A Full, G Andreasen
JournalAmerican journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics (Am J Orthod Dentofacial Orthop) Vol. 98 Issue 1 Pg. 47-55 (Jul 1990) ISSN: 0889-5406 [Print] United States
PMID2363406 (Publication Type: Journal Article)
Topics
  • Cephalometry
  • Child
  • Child, Preschool
  • Extraoral Traction Appliances
  • Facial Bones (anatomy & histology, growth & development)
  • Female
  • Humans
  • Male
  • Malocclusion (therapy)
  • Malocclusion, Angle Class III (therapy)
  • Mandible (anatomy & histology, growth & development)
  • Maxilla (anatomy & histology, growth & development)
  • Orthodontic Appliances, Removable
  • Retrospective Studies

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