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The bone surrounding each tooth
An abnormal union between two bones or between a root surface and surrounding bone resulting in tooth immobility.
The lower incisors are not overlapped in the vertical plane by the upper incisors and do not occlude with them.
A wire engaged into orthodontic brackets which delivers a force to produce tooth movement.
An instrument that mimics the movements of the lower jaw to which individual patients' upper and lower dental study models can be attached.
A surgical procedure to reposition the lower jaw forwards, backwards or by rotation.
Relating to the upper and lower dental arches or jaws.
Surgery to reposition both upper and lower jaws.
A precisely fabricated fixed orthodontic attachment made from metal, ceramic or plastic that is bonded to the teeth.
In the direction of the cheeks.
The lower incisors bite 2–4 mm behind the upper incisors.
The lower incisors bite further behind the upper incisors than normal and the upper incisors are normally inclined or proclined.
The lower incisors bite further behind the upper incisors then normal and the upper incisors are retroclined.
The lower incisors bite further forwards of the upper incisors than normal.
An overbite in which the lower incisors make contact with either the upper incisors or the gum tissue in the roof of the mouth.
A birth defect that may occur as an isolated phenomenon or as part of a syndrome, consisting of premature fusion of one or more skull sutures.
The upper incisor teeth or upper molar teeth bite on the inside of the lower teeth.
Often used to describe the loss of mineral from the tooth surface immediately surrounding an orthodontic appliance. It is caused by excessive intake of sugar and accumulation of bacteria (plaque) on the tooth surface. It results in permanent discolouration of the tooth surface and cavitation if extreme.
The process of removing dental compensations, using fixed appliances, that have attempted to naturally compensate for a mismatch in the jaw relationship. Decompensation is often carried out prior to surgical correction of jaw relationships.
The arch formed by the upper and lower teeth when viewed from below or above respectively.
The inclination of the teeth is naturally altered to help compensate for a mismatch in the jaw relationship.
A space between teeth (most commonly the upper central incisors).
Away from the midline.
A surgical technique for lengthening bones.
The eruption of a tooth in an abnormal position.
An orthodontic appliance used commonly to increase the width of the upper dental arch or jaw.
An appliance that is fixed to the tooth surfaces in order to produce tooth movement.
A fold of mucous membrane.
A surgical procedure to reposition the chin.
The gum tissue surrounding teeth.
A shift of the gum margin exposing the root surface.
Any material or tissue that is not normally part of an organ or tissue, implanted or transplanted for the purpose of reconstruction or repair.
The developmental absence of teeth excluding the wisdom teeth.
An artificial material that is placed into the body. Often used to refer to dental implants.
An imprint of the upper and/or lower teeth used to make study models of the teeth.
With the lower jaw in the rest position the lips are apart and muscular effort is required to obtain a lip seal.
A nerve which travels in the inferior dental canal (see below) and supplies sensation to the lower teeth, the lower gum tissue and the skin covering the lower lip and chin.
A canal that runs in the lower jaw that contains the inferior alveolar (dental) nerve (see inferior alveolar nerve).
A situation in which a tooth or group of teeth are positioned below the level of adjacent teeth commonly due to ankylosis (see â€˜ankylosisâ€™).
The segment of the jaw containing the incisor teeth.
The groove created where the curvature of the lower lip merges with the skin overlying the lower lip.
A radiograph of the side of the face and skull taken in a standardised reproducible position allowing accurate comparisons between radiographs taken at different time points.
A surgical procedure of the tooth-bearing segment of the upper jaw used to reposition the jaw most commonly in an anterior, upward (impaction) or downward direction.
A form of fixed orthodontic appliance that runs between the inner surfaces of the lower molar teeth designed to help prevent forward movement of the molars.
A poor relationship between the upper and lower dental arches or abnormal tooth positions.
The lower jaw.
The upper jaw.
The chamber present in the upper jaw and closely associated with the roots of the upper molar teeth.
Towards the midline.
Abnormally small jaw size.
A form of fixed orthodontic appliance that runs between the inner surfaces of the upper molar teeth, designed to help prevent forward movement of the molars.
The angle formed by the junction of the nasal base and upper lip.
A greater than normal distance between the inside walls of the orbital cavities.
A reduced distance between the inside walls of the orbital cavities.
Surgical procedure involving cutting the bone.
The overlap of the lower incisors by the upper incisors in the vertical plane.
The distance between the front surface of the lower incisors and the front surface of the upper incisors. The front surface of the upper incisors is usually 2–4 mm ahead of the front surface of the lower incisors.
Diminished or abnormal sensation, such as burning, prickling, tingling or numbness.
A soft, thin film of adherent deposit on the tooth surface composed of bacteria, bacterial products and salivary constituents. Some bacteria within plaque are associated with dental decay and gum disease.
The most anterior point on the contour of the chin.
The upper or lower incisors are inclined forwards to a greater degree than normal.
Protrusion of the jaw, most commonly the lower.
A form of expansion appliance that partially covers the roof of the mouth.
An orthodontic appliance used following orthodontic treatment in order to maintain the corrected tooth positions while the surrounding bone and gum tissue adapt to the new positions.
The upper or lower incisors are inclined backwards to a greater degree than normal.
Retrusion of the jaw. Often used to refer to the upper and lower jaw.
Loss of root length often accompanying orthodontic treatment.
One or more of the upper molar teeth bite outside the lower molar teeth.
The relationship between the dental arches in the anterior–posterior plane.
Teeth in excess of the usual number.
Casts of the upper and lower teeth used to plan and monitor treatment changes.
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