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Orthodontic Module:1 > Angle Classifications > Flashcards

Angle Classifications Flashcards

1
Q

Dentally-the mesiobuccal cusp of the upper first permanent molar articulates in the buccal groove of the lower first molar

A

Class 1 (neutroclusion)

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2
Q

Facially- Well balanced (straight, orthognathic or mesiognathic profile) unless there is a soft tissue discrepancy

A

Class 1 (neutroclusion)

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3
Q

Skeletally- the mandible is slightly posterior to the maxilla

A

Class 1 (neutroclusion)

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4
Q

Dentally-the mesiobuccal cusp of the upper first permanent molar articulates ANTERIOR to the buccal groove of the lower first molar

A

Class 2 (DISTOCLUSION)

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5
Q

Facially- upper lip may appear protrusive or lower lip and chin retrusive (RETRO-GNATHIC CONVEX profile)

A

Class 2 (DISTOCLUSION)

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6
Q

Skeletally- the mandible is retruded or maxilla is protruded or a combination of both

A

Class 2 (DISTOCLUSION)

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7
Q

Malocclusion:
3 identifiers
Described by
Characteristic

A

Identified in ANTEROposterior, TRANSVERSE, and VERTICAL dimensions
Described in relation the the affected tissue (TEETH, BONE, MUSCULATURE)
is UNIQUE to the INDIVIDUAL patient

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8
Q

Lischer’s Nomenclature

A

System for naming various dental malocclusions

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9
Q
  1. Mesioversion
  2. Distoversion
  3. Linguoversion
  4. Labioversion/Beccoversion
  5. Infraversion
  6. Supraversion
  7. Axioversion
  8. Torsiversion
  9. Transversion
A
  1. Mesially displaced
  2. Distally displaced
  3. Displaced towards tongue
  4. Displaced towards lip or cheek
  5. Superior to the occlusal plane in maxilla/inferior to the occlusal plane in the mandible
  6. Inferior to the occlusal plane in the maxilla/superior to the occlusal plane in the mandible
  7. Tipped/inclines
  8. Rotated
  9. In the wrong order in the dental arch
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10
Q

ALL upper incisors are proclined (tipped facially at the Incisal edge)

A

Class 2 division 1

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11
Q

Upper LATERAL incisors are proclined or rotated while the upper CENTRAL incisors are retroclined (tipped lingually at the incisal edge)
Hint:Kurtis McConnell case

A

Class 2 Division 2

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12
Q

Skeletally- the maxilla is retruded or mandible is protruded or a combination of both

A

Class 3 (MESIOCLUSION)

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13
Q

Dentally- the mesiobuccal cusp of the upper first permanent molar articulates POSTERIOR to the buccal groove of the lower first molar

A

Class 3 (MESIOCLUSION)

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14
Q

Upper lip may appear protrusive or lower lip and chin restrusive

A

Retro-gnathic convex profile

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15
Q

Upper lip may appear retrusive or lower lip and chin protrusive.

A

Prognathic concave profile

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16
Q

Over bite is Negative

A

Open Bite

17
Q

Over bite is excessively positive

A

Deep bite

18
Q

Vertical Component of Malocclusion

A

Upper incisors overlap the lower incisors vertically, this relationship is referred to as over bite

19
Q

Relationship between the maxilla and mandible/ upper and lower first permanent molar relationship

A

ANTEROposterior Component of Malocclusion

20
Q

The upper dental arch occludes slightly buccally and facially to the lower dental arch ( positive anterior over jet and buccal overjet present)

A

Transverse Component of Malocclusion

21
Q

Head and neck musculature can influence facial bone structure since forces acting upon bone influence bone structure.

Any influence over bone position can affect the relationship of teeth since teeth are situated in bone

A

Wolf’s Law

22
Q

Etiologic (cause) Agents act on head and neck muscle, bone, and teeth to produce malocclusion.

Examples:

A

Heredity
Developmental Defects (ex: cleft palate)
Trauma (ex:fractures of jaws/teeth)
Habits: Habitual application of undesirable force to bone can cause malocclusion (ex: thumb/finger sucking, tongue thrust)
Physical (ex: over retained deciduous teeth)

23
Q

Head and neck musculature can influence facial bone structure since forces acting upon bone influence bone structure.

Any influence over bone position can affect the relationship of teeth since teeth are situated in bone

A

Wolf’s Law

24
Q

Etiologic (cause) Agents act on head and neck muscle, bone, and teeth to produce malocclusion.

Examples:

A

Heredity
Developmental Defects (ex: cleft palate)
Trauma (ex:fractures of jaws/teeth)
Habits: Habitual application of undesirable force to bone can cause malocclusion (ex: thumb/finger sucking, tongue thrust)
Physical (ex: over retained deciduous teeth)

Orthodontic Module:1 (4 decks)

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