| orthodiagonal | <chemistry> The diagonal or lateral axis in a monoclinic crystal which is at right angles with the vertical axis. Origin: Ortho- + diagonal. Source: Websters Dictionary (01 Mar 1998) |
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| orthodigita | Correction of malformations of fingers or toes. Origin: ortho-+ L. Digitus, finger or toe (05 Mar 2000) |
| orthodome | <chemistry> See the Note under Dome. Origin: Ortho- + dome. Source: Websters Dictionary (01 Mar 1998) |
| orthodontia | <dentistry> Braces. (08 Jan 1998) |
| orthodontic appliance | A mechanism for the application of pressure to the teeth and their supporting tissues to produce changes in the relationship of the teeth and/or the related osseous structures. (05 Mar 2000) |
| orthodontic appliance design | The planning, calculation, and creation of an apparatus for the purpose of correcting the placement or straightening of teeth. (12 Dec 1998) |
| orthodontic appliances | Devices used for influencing tooth position. Orthodontic appliances may be classified as fixed or removable, active or retaining, and intraoral or extraoral. (boucher's clinical dental terminology, 4th ed, p19) (12 Dec 1998) |
| orthodontic appliances, functional | Loose, usually removable intra-oral devices which alter the muscle forces against the teeth and craniofacial skeleton. These are dynamic appliances which depend on altered neuromuscular action to effect bony growth and occlusal development. They are usually used in mixed dentition to treat paediatric malocclusions. (ada, 1992) (12 Dec 1998) |
| orthodontic band | A thin strip of metal closely adapted to the crown of a tooth to which wires may be attached for tooth movement. (05 Mar 2000) |
| orthodontic brackets | Small metal or ceramic attachments used to fasten an arch wire. These attachments are soldered or welded to an orthodontic band or cemented directly onto the teeth. Bowles brackets, edgewise brackets, multiphase brackets, ribbon arch brackets, twin-wire brackets, and universal brackets are all types of orthodontic brackets. (12 Dec 1998) |
| orthodontic retainers | Orthodontic appliances, fixed or removable, used to maintain teeth in corrected positions during the period of functional adaptation following corrective treatment. These appliances are also used to maintain the positions of the teeth and jaws gained by orthodontic procedures. (12 Dec 1998) |
| orthodontic space closure | Therapeutic closure of spaces caused by the extraction of teeth, the congenital absence of teeth, or the excessive space between teeth. (12 Dec 1998) |
| orthodontic treatment | Please see MedicineNet site on orthodontic treatment for information on this subject. (12 Dec 1998) |
| orthodontic wires | Wires of various dimensions and grades made of stainless steel or precious metal. They are used in orthodontic treatment. (12 Dec 1998) |
| orthodontics | The use of devices to move teeth or adjust underlying bone. The ideal age for starting orthodontic treatment is between ages 3 to 12 years. Temporomandibular joint (TMJ) problems can be corrected with splinting or dental braces. Teeth can be moved by removable appliances or by fixed braces. Crowding of teeth can require extraction of teeth. Retainers may be necessary long after dental braces are placed, especially with orthodontic treatment of adults. (12 Dec 1998) |