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Orthodontics 1 > Lab 2.2 Classifications of Malocclusion (Excluding those already mentioned in 2.1) > Flashcards

Lab 2.2 Classifications of Malocclusion (Excluding those already mentioned in 2.1) Flashcards

1
Q

Aids in the diagnosis and treatment planning of malocclusions by orienting the clinician to the type and the magnitude of the problems and possible mechanical solutions to the problems.

A

Classification

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2
Q

The relation of maxillary and mandibular teeth when the jaws are closed in a centric relation without strain of musculature or displacement of condyles in their fossae.

A

Occlusion

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3
Q

It is a pre-conceived theoretical concept of occlusal structures and functional relationships that include idealized principles and characteristics that an occlusion should have.

A

Ideal occlusion

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4
Q

It is some deviation from that of ideal but is aesthetically acceptable and functionally stable for the individuals.

A

Normal occlusion

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5
Q

The upper and lower teeth fit nicely and evenly together with the least amount of destructive interferences.

A

Normal occlusion

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6
Q

Defined as a condition where there is departure from the normal relation of the teeth to the other teeth in the same dental arch or teeth in opposing arch.

A

Malocclusion

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7
Q

An occlusion in which there is a malrelationship between the arches in any of the planes of the spaces or in which there are anomalies in tooth position beyond the limit of normal.

A

Malocclusion

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8
Q

It is a condition that reflects an expression of normal biologic variability in the way the maxilla and mandible teeth occlude

A

Malocclusion

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9
Q

The term ‘malocclusion’ was coined by?

A

Edward Angle

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10
Q

Key 1
The mesio-buccal cusp of the upper first molar should occlude in the ______ between the mesial and medial buccal cusp of the lower first molar.

Key 2
The gingival part of the long axis of the crown must be _____ to the occlusal part of the line

Key 3
The maxillary incisors exhibit a ________ crown inclination while the mandibular incisors show a very mild ______ crown inclination. The maxillary and mandibular posteriors have a ________ crown inclination.

Key 4
Normal occlusion is characterized by ________ of any rotation.

Key 5
To consider an occlusion as normal,
there should be ___________ between adjacent teeth.

Key 6
A normal occlusal plane according to Andrews should be _______, with the curve of Spee not exceeding _________.

A
  • groove
  • distal
  • postive; negative; negative
  • absence
  • tight contact
  • flat; 1.5 mm
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11
Q

3 types of malocclusion?

A
  1. Intra-arch
  2. Inter-arch
  3. Skeletal
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12
Q

It include variations in individual tooth position or a group of teeth within an arch.

A

Intra-arch malocclusion

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13
Q

It compromise of malrelationship between two teeth or group of teeth of one arch to another arch.

A

Intra-arch malocclusion

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14
Q

It involves the apical upper and lower bony bases.

A

Skeletal malocclusion

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15
Q

Intra-arch malocclusion include? (3)

A
  • Abnormal inclination.
  • Abnormal displacement.
  • Spacing and crowding within same arch.
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16
Q

This is a condition where the crown of tooth is tilted or inclined mesially.

A

Mesial inclination.

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17
Q

Refers to a condition where the crown is tilted or inclined distally.

A

Distal inclination

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18
Q

This is an abnormal lingual or palatal tilting of tooth.

A

Lingual inclination / retroclination

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19
Q

This refers to labial or buccal inclination of tooth.

A

Labial inclination / proclination

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20
Q

This refers to a tooth that is bodily moved in a mesial direction towards the midline.

A

Mesial displacement

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21
Q

This refers to a tooth that is bodily moved in a distal direction away from the midline.

A

Distal displacement

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22
Q

This is a condition where the entire tooth is displaced in lingual direction

A

Lingual displacement

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23
Q

This is a condition where the tooth is displaced bodily in labial or buccal direction.

A

Buccal displacement

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24
Q

This is a condition in which a tooth that has over erupted as compared to other teeth in the arch.

A

Extrusion / supra-version

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25
Q

Refers to a tooth that has not erupted enough as compared to other teeth in the arch.

A

Intrusion / infra-version

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26
Q

This describes a tooth that has rotated around its long axis so that the distal aspect is more lingually placed.

A

Disto-lingual / Mesio-buccal rotation

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27
Q

This is a condition where the tooth has rotated around its long axis so that the mesial aspect is more lingually placed.

A

Mesio-lingual / Disto-buccal rotationThis term describes a condition where two teeth have exchanged places.

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28
Q

This term describes a condition where two teeth have exchanged places.

A

Transposition

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29
Q

These inter-arch malocclusions can occur in the? (3)

A

Sagittal, vertical, transverse plane

30
Q

_______ malocclusion:
- The forward placement of a jaw is called as ________ while more backward placement of jaw is called as __________.

A
  • sagittal plane
  • prognathism
  • retrognathism
31
Q
  • The abnormal variations in vertical measurement of jaws can affect the lower facial height.
  • These malocclusions include deep bite and open bite where an abnormal vertical relation exists between the teeth of upper and lower arch.
A

Vertical plane malocclusions

32
Q
  • It is a result of narrowing or widening of jaws.
  • Can be described as narrow maxilla, wide mandible etc.
A

Transverse plane malocclusions

33
Q

This is a condition where the lower arch is more forwardly placed when the patient bites in centric occlusion.

A

Pre-normal malocclusion

34
Q

This is a condition where the lower arch is more distally placed when the patients bite in centric occlusion.

A

Post-normal malocclusion

35
Q

It includes various types of crossbites.

A

Transverse plane malocclusions

36
Q
  • They are the malrelations of apical bases of upper and lower arch.
A

Skeletal malocclusions

37
Q

Skeletal malocclusions may be due to? (4)

A
  • Abnormal size
  • Abnormal shape
  • Abnormal relation to the skull - Abnormal relation to each other
38
Q

Another malocclusion that is most often categorized under class I is ___________________ where the patient exhibit normal class I molar relationship but the dentition of both the upper and lower arches are forwardly placed in relation to facial plane.

A

bimaxillary protrusion

39
Q

The mesiobuccal cusp of maxillary 1st molar occludes the interdental space between mandibular 1st and 2nd molars.

A

Class III (Angle’s classification)

40
Q

It is of genetic origin and is due to:
- Excessively large mandible
- Forwardly placed mandible
- Smaller than normal maxilla
- Retro positioned maxilla
- Combination of above causes

The lower incisor tend to be lingually inclined.

A

True / Skeletal Class III

41
Q

It is produced by forward movement of mandible during jaw closure; thus it is also called postural or habitual class III malocclusion.

A

Pseudo Class III

42
Q

It is due to:
- Presence of occlusal prematurities may deflect the mandible forward.
- In case of premature loss of deciduous posteriors.
- A child with enlarged adenoids.

A

Pseudo Class III

43
Q

The distobuccal cusp of the maxillary 1st molar lies within the buccal groove of mandibular 1st molar.

A

Class II

44
Q

Angle’s Class II:

DIVISION 1:
- Proclined upper incisors with a resultant increase in ______.
- A deep incisor _____ can occur in anterior region.
- Presence of abnormal muscle activity.
- The upper lip is usually hypotonic, short and fails to form a ________.
-The lower lip cushions the palatal surface of upper teeth called as “_______”.
- The muscle imbalance is produced by a hyperactive _______ and _________ and an altered tongue that accentuates the narrowing of upper dental arch (V shape).

DIVISION 2:
- Presence of ________ inclined upper central incisors and ________ tipped lateral incisors overlapping the central incisors.

A
  • overjet
  • overbite
  • lip seal
  • lip trap
  • buccinator and mentalis
  • lingually; labially
45
Q

Buccal placement of a tooth or group of teeth.

A

Buccocclusion

46
Q

Lingual placement of tooth or group of teeth.

A

Linguocclusion

47
Q

When a tooth or group of teeth have erupted beyond the normal level.

A

Supraocclusion

48
Q

When a tooth or group of teeth have erupted below the normal level

A

Infraocclusion

49
Q

Mesial to normal position

A

Mesioversion

50
Q

Distal to normal position.

A

Distoversion

51
Q

Transposition of two teeth.

A

Transversion

52
Q

Abnormal axial inclination of a tooth.

A

Axiversion

53
Q

Rotation of a tooth around its long axis.

A

Torsiversion

54
Q

This classification is based on etiology.

A

Bennett’s classification

55
Q

Abnormal position of one or more teeth due to LOCAL CAUSES.

A

Class I (Bennett’s)

56
Q

Abnormal formation of a part of or whole of either arch due to DEVELOPMENTAL DEFECTS of bone.

A

Class II (Bennett’s)

57
Q

Abnormal relationship between upper and lower arches, and between either arch and facial contour and correlated abnormal formation of either arch.

A

Class III (Bennett’s)

58
Q

It is a craniometric classification.

A

Simon’s classification

59
Q

Classification was based on abnormal deviations of dental arches form their normal position in relation to these three anthropometric planes.

A

Simon’s classification

60
Q

It connects the margin of the external auditory meatus to the infra-orbital margin.

A

Frankfort’s horizontal plane

61
Q

This plane is perpendicular to the Frankfort plane, dropped down from the bony orbital margins directly under the pupil of the eye.

A

Orbital plane

62
Q

According to Simon, this plane should pass through the DISTAL THIRD OF UPPER CANINE called as Simon’s law of canine.

A

Orbital plane

63
Q

This plane is used to describe malocclusion in sagittal or antero-posterior direction.

A

Orbital plane

64
Q

It is used to describe malocclusion in transverse direction.

A

Mid-sagittal plane

65
Q
  • Considered transverse and vertical discrepancies.
  • Evaluated crowded and arch asymmetry.
  • Incisor protrusion.
  • Influence of dentition on profile.
A

Ackerman and Proffit’s Classification

66
Q

Ackerman and Proffit’s Classification is based on 5 characteristics, which are?

A
  1. Alignment
  2. Profile
  3. Transverse relationship
  4. Class
  5. Bite depth
67
Q

Also known as Incisor Classification.

A

Ballard’s classification

68
Q

Who developed the premolar relationship?

A

Katz

69
Q

Most anterior upper premolar fits exactly into the embrasure created by distal contact of most anterior lower premolar.

A

Premolar Class I

70
Q

Most anterior premolar is occluding MESIAL embrasure created by distal contact of most anterior lower premolar.

A

Premolar Class II

71
Q

The most anterior premolar is occluding DISTAL of the embrasure created by the most anterior lower premolar.

A

Premolar Class III

Orthodontics 1 (7 decks)

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