Ligation

Question 1

What is Ligation used for?

Answer 1

3 dimensional control of tooth movrment

Question 2

What two types of ligation are used?

Answer 2

•Elastomeric ligatures (modules)
• SS ligatures 0.009 + 0.010

Question 3

Advantages of SS ligatures?

Answer 3

• cheap
•clean
•loose= low friction and good sliding (if Teflon coated)
•tight=good torque

Question 4

Disadvantages of SS Ligatures

Answer 4

•Time consuming
•sharp
•tight= poor sliding
•loose= poor rotation
•Teflon coating can come off

Question 5

Advantages of Elastomeric Ligature Modules

Answer 5

•Quick to place
•Good rotational control
•fluoride releasing

Question 6

Disadvantages of Elastomeric Ligature Modules

Answer 6

• Hydrolytic Degrading
• Absorb water and bacteria
•Poor sliding
• loss of colour/ stain
• full bracket engagement is not always achieved