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Ortho > Occlusion and Malocclusion > Flashcards

Occlusion and Malocclusion Flashcards

1
Q

what is ideal occlusion?

A

anatomically perfect arrangement of teeth

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2
Q

what is normal occlusion?

A

acceptable variation from ideal

  • all teeth well aligned
  • no crowding
  • class 1 incisor/molar relationship
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3
Q

what is malocclusion?

A

irregularity of occlusion beyond accepted range of normal

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4
Q

what is class 1 malocclusion?

A

squint teeth

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5
Q

what is class 2 malocclusion?

A

big overjet

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6
Q

what is class 3 malocclusion?

A

lower teeth further in front of uppers

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7
Q

what are genetic causes of malocclusion?

A

skeletal pattern
size of jaws/teeth
syndromes - cleft lip and palate

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8
Q

what is class 1 skeletal pattern?

A

maxilla only few mm ahead of mandible

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9
Q

what is class 2 skeletal pattern?

A

maxilla ahead of mandible

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10
Q

what is class 3 skeletal pattern?

A

small maxilla and large mandible or a combo

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11
Q

what about teeth/jaws causes crowding?

A

small jaws, large teeth

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12
Q

what about teeth/jaws causes spacing?

A

large jaws, small teeth

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13
Q

what about lips can cause malocclusion?

A

incompetent lips

top teeth allowed to come forward

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14
Q

what about trauma can cause malocclusion?

A

more chance in a class 2 - intrusion

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15
Q

what sort of tumor could cause malocclusion?

A

odontogenic tumor

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16
Q

what local factors can cause malocclusion?

A 
supernumeraries
hypodontia
fraenum - midline diastema
retained deciduous - prevents eruption
early loss of deciduous - loss of space and crowding
17
Q

what is IOTN?

A

index of otho tx need

18
Q

what does IOTN do and what are the components?

A

measures severity of malocclusion

dental health aspect and aesthetic aspect

19
Q

what is IOTN 1/2/3/4/5

A
  1. no tx needed
  2. little tx req’d
  3. borderline
    4/5. tx needed

Ortho (10 decks)

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