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Archwire
A wire engaged in orthodontic attachments, affixed to the crowns of two or more teeth, and capable of causing or guiding tooth movement.
Band (orthodontic)
A thin metal ring, usually stainless steel, which serves to secure orthodontic attachments to a tooth. The band, with orthodontic attachments welded or soldered to it, is closely adapted to fit the contours of the tooth and then cemented into place.
Bracket
An orthodontic attachment that is secured to a tooth (either by bonding or banding) for the purpose of engaging an arch wire. Brackets can be fabricated from metal, ceramic, or plastic.
Ceramic brackets
Crystalline alumina tooth-shade or clear synthetic sapphire brackets that are aesthetically more attractive than conventional metal attachments.
Crowding
Dental malalignment caused by inadequate space for the teeth.
Debanding
The removal of cemented orthodontic bands.
Elastics (rubber bands)
Used to move teeth in prescribed direction (commonly connected to molar band and upper ball hook).
Gingiva (Gum Tissue)
The tissue that surrounds the teeth, consisting of a fibrous tissue that is continuous with the periodontal ligament and mucosal covering.
Headgear
Generic term for extraoral traction (attached around the back side of the head) for growth modification, tooth movement, and anchorage.
Imaging (photographic and radiographic)
The process of acquiring representations of structures in either two or three dimensions.
Mandibular
Of or pertaining to the lower jaw. May be used to describe teeth, dental restorations, orthodontic appliances, or facial structures.
Maxillary
Of or pertaining to the upper jaw. May be used to describe teeth, dental restorations, orthodontic appliances, or facial structures.
Orthodontist
A dental specialist who has completed an advanced post-doctoral course, accredited by the American Dental Association, of at least two academic years in the special area of orthodontics after earning a doctorate degree.
Orthognathic surgery
Surgery to alter relationships of teeth and/or supporting bones, usually accomplished in conjunction with orthodontic therapy.
Overbite
Vertical overlapping of upper teeth over lower teeth, usually measured perpendicular to the occlusal plane.
Radiograph (X-Ray)
A permanent image, typically digital, produced by ionizing radiation. Sometimes called an x-ray.
Retainer
Any orthodontic appliance, fixed or removable, used to maintain the position of the teeth following corrective treatment.
Retention
The passive treatment period following active orthodontic correction during which retaining appliances are used.
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