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Orthodontic Therapy > Definitions > Flashcards

Definitions Flashcards

1
Q

What is the definition of a Class I molar relationship?

A

The Mesiobuccal cusp of the Upper first molar occludes with the buccal groove of the lower first molar

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2
Q

What is the definition of a Class II Molar relationship?

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

What is the definition of a Class III molar relationship?

A

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

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4
Q

What is the definition of a Class I incisor relationship?

A

The lower incisor edge occludes on or immediately below the cingulum plateau of the Upper Central incisor

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5
Q

What is the definition of a Class II Div I incisor relationship

A

The lower incisor edge occludes posterior to the cingulum plateau of the Upper Central incisors. The upper central incisors are proclined
-increased overjet

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6
Q

What is the definition of a Class II Div II incisor relationship?

A

The lower incisor edge occludes posterior to the cingulum plateau of the Upper Central incisors. The upper central incisors are retroclined.
-reduced or increased Overjet
-lateral incisors proclined

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7
Q

What is the definition of a Class III incisor relationship?

A

The lower incisor edge occludes anterior to the cingulum plateau of the Upper Central incisors

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8
Q

What is the definition of an Overbite?

A

It is the vertical overlap of the Upper incisors over the lower incisors.

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9
Q

What is the definition of an Overjet?

A

It is the horizontal overlap of the Upper Central incisors over the lower central incisors

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10
Q

What is the definition of Anterior open bite

A

No vertical overlap of the Upper and Lower incisors when teeth are in occlusion

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11
Q

What is the definition of Posterior Open Bite

A

No occlusal contact of the Upper and Lower posterior teeth when teeth are in occlusion

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12
Q

What is the definition of a cross bite?

A

Abnormal relationship between opposing teeth in buccopalatal or buccolingual direction

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13
Q

What is the definition of Malocclusion?

A

Upper and Lower teeth are outside of ‘normal’ range when in occlusion

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14
Q

What is the definition of Leeway space?

A

The lower difference in diameter between the primary canine, 1st and 2nd Molars and their secondary counterparts

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15
Q

What is the definition of retention?

A

The holding of teeth following orthodontic treatment to maintain the result achieved at the end of treatment

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16
Q

What is the definition of relapse?

A

The return of teeth towards their pretreatment position at the end of treatment

17
Q

What is the definition of Hypodontia?

A

Congenital absence of one or more primary or secondary teeth

18
Q

What is the definition of Oligodontia?

A

Absence of 6 or more teeth

19
Q

What is the definition of Anodontia?

A

Total loss of all teeth

20
Q

What is the definition of Supernumerary teeth?

A

Tooth or tooth like structure which develops alongside the normal series of teeth

21
Q

What is the definition of impaction?

A

Failure of eruption of a tooth/canine due to crowding or an obstruction within the dental arch

22
Q

What is the definition of Dental Panoramic Tomography? (DPT)

A

A radiograph that gives a 2 dimensional view of the Maxilla and Mandible

23
Q

What is the definition of a Cephalometric Radiograph?

A

True lateral view of the skull. A 2 dimensional image presenting the skull and facial bones

24
Q

What is the definition of Upper Standard Occlusal radiograph?

A

A radiograph taken of the anterior part of the maxilla and the anterior teeth

25
Q

What is the definition of Orthodontics?

A

A branch of dentistry concerned with dento facial anomalies, craniofacial malformations, and correction of irregularities of the teeth

26
Q

What is the definition of Occlusion?

A

The arrangement and position of the Upper and Lower teeth when in the contact position

27
Q

What is the definition of Neutral Zone?

A

Position where the forces of the lip, cheek and tongue are neutral

Orthodontic Therapy (4 decks)

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