Ortho Assessment Revision Questions

Question 1

What is the ideal occlusion - Andrews 6 keys

Answer 1

Molar relationship 
Crown angulation 
Crown inclination 
No rotations
No spaces
Flat occlusal planes

Question 2

Habits

Answer 2

Thumb sucking
Lower lip sucking
Tongue thrust
Chewing finger nails

Question 3

Measure anterior posterior relationship

Answer 3

Palptate skeletal bases and ANB degree angle on lateral ceph

relationship between A and B points on soft tissues

Question 4

Tongue

Answer 4

Adaptive or endogenous tongue thrust

Question 5

Comptent lips

Answer 5

meet together at rest without muscular activity

Question 6

incompetent lips

Answer 6

method in which they achieve oral seal should be checked - either tongue to lower lip ot by patient bringing lips together

Question 7

Problems with imcomptent lips

Answer 7

face not developed correctly 
longer face
impeeded speech 
mouth breathing leading to dry mouth
Class 11 div 2

May develop lip trap (proclined upper incisiors) lead to relapse of OJ

Question 8

Strap lower lip

Answer 8

hyperactive lower lip - retroclined lower incisors
affects position of anterior teeth
indicates instability at end of Rx plan