tx class 2 malocclusions Flashcards

1
Q

class II incisor classification

A

Lower incisor occluded behind the upper incisor cingulum plateau
div 1
- upper incisor proclined or normal angel
- lower tip of incisor is sitting behind the cingulum rest

div 2

  • upper incisor is retroclined
  • pink normal angulation
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2
Q

what is the main limiting factor in class 2 treatments

A

skeletal pattern

- growing and non growing patient)

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3
Q

what is good at reducing overjets

A

functional appliances

straight wire not very good

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4
Q

treatment of class IIs

A
growing patietn
- functional appliance and orthodontic camouflage
non growing
- OC^
- orthognatic surgery
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5
Q

functional appliance treatments

A

activators
- mild non crowded places
twin blok
- severe crowed cases

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6
Q

orthodontic camouflage

A

fixed appliances +- extractions to correct WO surgery

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7
Q

what is key to planning anchorage

A

lower arch crowding

molar and canine relationship

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8
Q

class 2 incisor, class 1 molar

A

no XLA

just arch wire to pull teeth back

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9
Q

what can be used for anchorage

A
  • headgear
  • palatal arches (bar accross palate)
  • implants ( can place force on the implant, fixed with miniscrews)
  • class II elastics
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10
Q

tx for no lower crowding , class II half molars

A

1) non extraction
- distal movement
- use of headgear
2) extraction upper 7s
- distal movement of the 6
3) extraction upper premolars
- will end up in a class 2 position, everything has moved one unit forward, whilst bringing the 1,2,3 back

full class 2 more stable

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11
Q

lower crowding molar class tx

A
class I
- upper and lower extractions
half unit class II
upper and lower extractions 1/2 premolars depending on crowding extent
class 2 
upper and lower extractions
severe anchorage problems ,cannot let molars move, elastics placed
- 2 units out from top and bottom
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