title: Extra-oral traction.
abstract: In orthodontics, the two main uses of extra-oral forces are in distalizing upper teeth and providing anchorage in the treatment of Class I and Class II malocclusions. This article reviews the theoretical principles behind the use of headgear, outlines the types available, and identifies the most appropriate designs for particular clinical situations. Practical guidelines for managing headgear treatment are also given.
authors.affiliation: Birmingham Dental School.
authors.forename: P J
authors.initials: PJ
authors.lastname: Turner
mesh_terms: D003799:Dental Stress Analysis; D005115:Extraoral Traction Appliances / Q000009:adverse effects*; D005131:Eye Injuries / Q000209:etiology; D005260:Female; D006801:Humans; D008310:Malocclusion / Q000628:therapy*; D014087:Tooth Movement Techniques / Q000379:methods*