tx class 3 malocclusions

Question 1

class 3 incisor

Answer 1

Lower incisor occludes in front of upper incisor cingulum plateau

Question 2

correction of class III depends on

Answer 2

skeletal pattern
overbite
growth potential

Question 3

class III skeletal pattern aetiology

Answer 3

Md protrusion
mx retrusion
combination

Question 4

what is treatment affected by

Answer 4

reduced or normal overbite

Question 5

class III normal inclined upper incisors

Answer 5

may want to procaine the upper incisor to allow contact with teeth + overjet
- however overbite negatively impacted
also proclined upper incisors not stable

Question 6

class III normal overbite, mild skeletal pattern tx

Answer 6

no lower arch explain due to little crowding
do not extract upper arch as diameter will change compared to lower
crowding in upper arch can be fixed by proclination upper incisors

Question 7

interceptive treatment for class III

Answer 7

interceptive tx with skeletal pattern
- growth modificairton
Chin cup, face mask or class 3 functional appliance

Question 8

problems with functional appliances to treat class III

Answer 8

only small amount of activation possible
mx retrusion common
continued grwoth

Question 9

potential problems with class III case intervenstion

Answer 9

class 3 skeletal pattern
overbite (need enough to retain correction and ensure stabile)
space
interface with primary canines (can get cross bite from primary canines)
position of permanent canine (prevents movement of lateral incisor
growth