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Orthodontic Therapy > Orthodontic Definitions > Flashcards

Orthodontic Definitions Flashcards

1
Q

Class I Molar

A

The mesiobuccal cusp of the upper first molar occludes in the buccal groove of the lower first molar

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2
Q

Class II Molar

A

The mesiobuccal cusp of the upper first molar occludes anterior to the buccal groove of the lower first molar

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3
Q

Class III Molar

A

The mesiobuccal cusp of the upper first molar occludes posterior to the buccal groove on the lower first molar

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4
Q

Class I Incisor

A

The lower incisors edges occlude with or lie immediately below the cingulum plateau of the upper central incisors

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5
Q

Class IIi Incisors

A

The lower incisal edge occludes posterior to the cingulum plateau of the upper central incisors
* Central incisors = proclined
* increased overjet

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6
Q

Class IIii Incisors

A

The lower incisor edges occlude posterior to cingulum plateau of the upper central incisors
* Upper Centrals= retroclined
*Overjet= reduced or increased
*upper laterals = proclined

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7
Q

Class III Incisors

A

The lower incisal edges occlude anterior the cingulum plateau of the upper central incisors
* Overjet= reduced or reversed

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8
Q

Class I Canine

A

The upper canine occludes and lies in the embrasure of the lower canine and the first premolar

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9
Q

Class II Canine

A

The upper canine occludes and lies in the embrasure of the lower canine and the lower lateral incisor

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10
Q

Class III Canine

A

The upper canine occludes and lies in the embrasure of the lower first and lower second premolar

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11
Q

Hypodontia

A

Missing teeth
*congenital absence of one of more teeth

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12
Q

Oligondontia

A

6> teeth missing

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13
Q

Anodontia

A

Total loss of teeth

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14
Q

Supernumerary

A

An extra tooth

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15
Q

Impaction

A

Failure to erupt due to crowding or obstruction Eg. Impacted canine

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16
Q

Deepbite

A

Vertical overlap of the upper incisors over the lower incisors 4mm >

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17
Q

Normal overbite

A

Upper incisors cover 1/3 of the lower incisors

18
Q

Increased Overbite

A

Upper incisors cover 1/3 > of the lower incisors

19
Q

Decreased Overbite

A

Upper incisors cover < 1/3 of the lower incisors

20
Q

Incomplete Overbite

A

Lower incisors do not come into contact with hard or soft tissues

21
Q

Complete Overbite

A

Lower incisors come into contact with hard and soft tissues

22
Q

Anterior Open Bite

A

No vertical overlap of the upper and lower incisors when occluding

23
Q

Posterior Open Bite

A

No vertical overlap of the upper and lower posterior teeth when occluding

24
Q

Crossbite

A

An abnormal relationship between the opposing teeth in the buccopalatal or buccolingual direction

25
Q

Posterior Crossbite

A

Buccal cusp of the lower tooth occludes buccally to the buccal cusp of the upper tooth when occluding

26
Q

Lingual/ scissor Crossbite

A

The buccal cusp of the lower tooth occludes palatally to the palatal cusp of the upper tooth when occluding

27
Q

Anterior Crossbites

A

Maxillary incisors occlude lingually to the lower incisors when occluding

28
Q

Overjet

A

distance between the upper incisors and the lower incisors in the horizontal plane.
Normal is 2-4mm

29
Q

Bimaxillary Proclination

A

Upper and lower incisors are proclined

30
Q

Centre of Resistance

A

Point in the body where resistance to movement is concentrated

31
Q

Force Moment

A

The Component found within a force that causes rotation

32
Q

Force Couple

A

Fixed Appliance Eg. Archwire connects into a bracket slot and a force is created. This achieves Rotation, Inclination and torqueing.

33
Q

Dental Panoramic Tomography
DPT, OPT, OPG

A

Radiograph that gives a two dimensional view of the mandible and the maxilla.

34
Q

Cephalometric Radiograph

A

A true lateral view of the skull, a two dimensional image of a three dimensional object presenting the skull and facial bones

35
Q

Upper Standard Occlusal Radiograph
USO

A

A radiograph of the upper anterior part of the Maxilla and anterior teeth

36
Q

Parallax

A

A technique used when assessing or localising the position of unerupted teeth

37
Q

Anchorage

A

Control of unwanted tooth movement

38
Q

IOTN
Index of Orthodontic Treatment Need

A

To asses the need of Treatment

39
Q

PAR
Peer Assessment Rating

A

used to measure the success of treatment

40
Q

Cleft Lip and Palate

A

A cranio facial malformation

41
Q

Tooth Fusion

A

when two individual teeth are fused together. Each tooth has an individual pulp and root canal

42
Q

Tooth Germination

A

When two teeth develop together and form one tooth. A large crown is present and only one root

Orthodontic Therapy (26 decks)

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