tx class 2 malocclusions

Question 1

class II incisor classification

Answer 1

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

Question 2

what is the main limiting factor in class 2 treatments

Answer 2

skeletal pattern

- growing and non growing patient)

Question 3

what is good at reducing overjets

Answer 3

functional appliances

straight wire not very good

Question 4

treatment of class IIs

Answer 4

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

Question 5

functional appliance treatments

Answer 5

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

Question 6

orthodontic camouflage

Answer 6

fixed appliances +- extractions to correct WO surgery

Question 7

what is key to planning anchorage

Answer 7

lower arch crowding

molar and canine relationship

Question 8

class 2 incisor, class 1 molar

Answer 8

no XLA

just arch wire to pull teeth back

Question 9

what can be used for anchorage

Answer 9

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

Question 10

tx for no lower crowding , class II half molars

Answer 10

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

Question 11

lower crowding molar class tx

Answer 11

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