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oral anatomy > occlusion > Flashcards

occlusion Flashcards

1
Q

Mesial Step

A

Mandibular molars more mesial than maxillary molars
- most children

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2
Q

Flush Terminal Plane

A

Mandibular molars & maxillary molars are even

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3
Q

Distal Step

A

Mandibular molars more distal than maxillary molars
– least common

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4
Q

What is the relationship between in Centric Relation?

A

A relationship of the upper jaw to the lower jaws.

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5
Q

What is the relationship between in Centric Occlusion

A

A relationship of the upper teeth to the lower teeth.

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6
Q

What is Centric Relation (CR)?

A

The most retruded relationship of the mandible to the maxilla, occurring during strong muscle contractions like swallowing.

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7
Q

What is the ideal relationship between Centric Relation (CR) and Centric Occlusion (CO)?

A

CR = CO, meaning the mandible and dentition align at “home base.”

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8
Q

What is Centric Occlusion (CO)?

A

The static position of teeth in opposite arches, also known as habitual, acquired, convenience, intercuspal, or static occlusion.

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9
Q

What is Maximum intercuspation in Centric Occlusion?

A

maximum closure of the maxillary & mandibular arches

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10
Q

What is Maximum Interdigitation in Centric Occlusion?

A

Maximum touching of maxillary & mandibular arches

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11
Q

Inter-arch Malocclusions

A

Midline off center

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12
Q

Inter-arch Malocclusions: Posterior crossbite

A
  • Mandibular arch is facial or lingual to maxillary arch
  • Unilateral or bilateral
  • Incorrect horizontal overlap
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13
Q

Inter-arch Malocclusions: Anterior crossbite

A
  • Max incisors lingual to mand incisors
  • Incorrect horizontal overlap
  • Edge to edge
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14
Q

Inter-arch Malocclusions: Edge to edge

A

anterior teeth

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15
Q

Inter-arch Malocclusions: end to end

A

posterior teeth

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16
Q

Inter-arch Malocclusions: Open bite

A
  • Anterior or posterior
  • Bilateral or unilateral
  • Most frequently – anterior
17
Q

Intra-arch Malocclusions: Supraversion

A

Above occlusal plane

18
Q

Intra-arch Malocclusions: Infraversion

A

Below occlusal plane

19
Q

Intra-arch Malocclusions: Drifted mesial

A

Tooth was extracted

20
Q

Intra-arch Malocclusions: Linguoversion

A

Tooth positioned more lingual

21
Q

Intra-arch Malocclusions: Torsoversion

A

Rotated or twisted
Rotated mesial
Rotated distal

22
Q

What is the facial profile of Class I malocclusion?

A

Mesognathic profile

23
Q

What is the molar relationship of Class I malocclusion?

A

MB cusp of max 1st molar – buccal groove of mand 1st molar

24
Q

What is the canine relationship of Class I malocclusion?

A

Max canine lies between mand canine & mand 1st premolar

25
Q

Conditions that occur in Class I malocclusion?

A
  • Malposition – individual teeth or groups of teeth
  • Crowded anterior teeth
    Protruded or retruded max incisors
  • Anterior crossbite
  • Posterior crossbite
  • Mesial drift
26
Q

What is the molar relationship of Class II malocclusion?

A

Buccal groove of mand 1st molar – distal to MB cusp of max 1st molar

27
Q

What is the canine relationship of Class II malocclusion?

A

Distal of mand canine distal to mesial surface of max canine (mand canine is further back than before)

28
Q

What is the facial profile of Class II malocclusion division 1 and 2?

A

Retrognathic profile

29
Q

Conditions that occur in Class II, division 1?

A
  • Mandible retruded, max incisors protruded
  • Deep overbite
  • Excessive overjet
  • Abnormal muscle function
  • Short mandible
  • Short upper lip
30
Q

Conditions that occur in Class II, division 2?

A
  • Mandible retruded, one or more max incisors retruded
  • Max laterals protrude, max centrals retrude
  • Crowded max anterior teeth
    Deep overbite
31
Q

What is the facial profile of Class III malocclusion?

A

Prognathic profile

32
Q

What is the molar relationship of Class III malocclusion?

A

Buccal groove of mand 1st molar – mesial to MB cusp of max 1st molar

33
Q

What is the canine relationship of Class III malocclusion?

A

Distal of mand canine mesial to mesial of max canine

34
Q

Conditions that occur in Class III

A
  • Anterior crossbite
  • Max & mand incisors edge-to-edge occlusion
  • Crowded mand incisors
35
Q

What is Overjet?

A

Horizontal overlap
- Maxilla overlap Mandible
- Whole arch

36
Q

What is Overbite

A

Vertical overlap
- Overlap of anterior teeth

oral anatomy (9 decks)

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