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Orthodontics Practice Glossary

105 terms total — 24 showing — Last updated 15 Sep 2026

Dental Attachments

Intermediate Technical IVT

Small composite resin shapes bonded to tooth surfaces to improve the grip and directional force of clear aligners during tooth movement.

Showing 49–72 of 105

A validated two-component index used in the UK to assess and prioritise patients' need for orthodontic treatment on the...

Technical Term Full entry →

Indirect Bonding

Advanced Technical IVT

A bracket placement technique in which brackets are positioned on a laboratory model and then transferred to the patient...

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Interceptive Treatment

Intermediate Technical IVT

Early orthodontic intervention aimed at correcting or reducing a developing malocclusion in the mixed dentition before f...

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Intraoral Scanner

Intermediate Technical IVT

A handheld optical device used chairside to capture a digital three-dimensional impression of the teeth and soft tissues...

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IOTN

Advanced Technical IVT

Index of Orthodontic Treatment Need; a validated scoring system used in the UK to assess and prioritise the clinical and...

Abbreviation Full entry →

IPR

Intermediate Technical IVT

Interproximal Reduction; the controlled removal of small amounts of enamel from the contact surfaces between adjacent te...

Abbreviation Full entry →

Labial Bow

Intermediate Technical IVT

A wire component of a removable orthodontic appliance that passes across the labial surface of the anterior teeth to pro...

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Lateral Cephalogram

Intermediate Technical IVT

A standardised lateral skull radiograph taken at a fixed distance with the patient in the natural head position, used as...

Document Type Full entry →

Levelling

Intermediate Technical IVT

The orthodontic phase of treatment aimed at aligning the occlusal plane by eliminating vertical discrepancies such as a...

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Lip Competence

Intermediate Technical IVT

The ability of the lips to achieve a comfortable, unstrained seal at rest, an important aesthetic and functional outcome...

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Malocclusion

Intermediate Technical IVT

Any deviation from the ideal alignment and occlusal relationship of the upper and lower dental arches. Classified by Ang...

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Mandibular Advancement Device

Intermediate Technical IVT

A removable oral appliance that repositions the mandible anteriorly to manage obstructive sleep apnoea or temporomandibu...

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Mesial Drift

Advanced Technical IVT

The natural tendency of teeth to migrate toward the midline (mesially) over time, driven by interproximal wear and occlu...

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Mesiodens

Advanced Technical IVT

A supernumerary (extra) tooth located in the midline of the maxilla, between the upper central incisors, which may cause...

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Molar Band

Intermediate Technical IVT

A thin metal ring cemented circumferentially around a molar tooth to provide anchorage and attachment points for orthodo...

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Molar Distalization

Advanced Technical IVT

The controlled orthodontic movement of upper or lower molar teeth in a posterior (distal) direction to create space or c...

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Molar Relationship

Intermediate Technical IVT

The antero-posterior relationship of the upper and lower first permanent molars, classified as Class I, II, or III accor...

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Nance Appliance

Intermediate Technical IVT

A fixed palatal arch appliance with an acrylic button resting against the anterior hard palate, used to maintain upper m...

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Occlusal Plane

Advanced Technical IVT

The imaginary flat surface that contacts or most nearly contacts the incisal edges of the anterior teeth and the cusps o...

Technical Term Full entry →

Occlusal Radiograph

Intermediate Technical IVT

A type of intraoral dental X-ray in which the film or sensor is held between the occlusal surfaces of the teeth, used to...

Document Type Full entry →

Open Bite

Intermediate Technical IVT

A malocclusion in which opposing upper and lower teeth fail to make contact when the jaws are closed, most commonly occu...

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OPG

Basic Technical IVT

Abbreviation for orthopantomogram, a panoramic dental radiograph showing the full dentition and surrounding structures i...

Abbreviation Full entry →

Orthognathic Surgery

Advanced Formal IVT

Corrective jaw surgery performed to address severe skeletal discrepancies that cannot be resolved by orthodontic treatme...

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Overbite

Intermediate Technical IVT

The vertical overlap of the upper incisors over the lower incisors when the teeth are in occlusion, measured in millimet...

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Showing 49–72 of 105

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