Tooth Movements Flashcards
1
Q
What is the centre of resistance?
A
Reference point for controlled tooth movement
2
Q
Where is the centre of resistance on a single rooted tooth?
A
1/3 - 1/2 down the root
3
Q
Where is the centre of resistance on a multi rooted tooth?
A
Root furcation
4
Q
Where is the centre of resistance on a tooth when periodontal disease is present?
A
More apically due to tooth loss
5
Q
What are the different types of tooth movement?
A
Tipping
Bodily
Rotation
Extrusion
Intrusion
6
Q
What is a Force Moment?
A
Force applied not direct at the centre of resistance = Rotations
7
Q
What is a Force Couple?
A
Two opposite and equal forces
Bracket and wire =
rotations,
inclinations
Torque
8
Q
Force moment + couple
A
Bracket ( edgewise - prescription) +
SS wire
= Bodily movement
