Self Ligation Flashcards
What is the most common Self Ligating bracket and when was it made?
Damon
1996
Describe a self ligating bracket?
The wire is fully engaged when the slide/clip is closed
When the clip is closed what is formed bracket wise?
A “tube” like bracket
What does the 4 wall tube like bracket provide?
•The same torque and rotations as a tube bracket
• lowest friction
•lowest binding
Ligation is used to create…
3 dimensional control of tooth movement
Ideal Self Ligating Properties
• Easy to close/open
•Full wire engagement
•low/high friction
•Easy attachment and auxiliaries
•Easy to clean
•Comfortable
•Aesthetic
What two types of Self Ligating Appliances are there?
Passive and Active
Describe an Active Self Ligating Appliance
Wires are free to slide @ the start of treatment but bind actively later on in trt
What material of brackets creates more friction?
Polycarbonate (plastics)
Describe an Passive Self Ligating Appliance
Wires are free to slide and jiggle in the tubes at every phase of trt
What force and friction is created by Self Ligation?
Low force and low friction = things move faster
What does the slot in the self ligating bracket control?
•rotations
•leveling
•tip and torque
Advantages of Self Ligating
• Less Friction
•Freedom of movement = quicker
• Improved Cross Infection
•Reduced Chairside
•trt time reduced
• Wider smile
•no invasive trt eg. Headgear, tpa
Disadvantages of Self Ligation?
• Expensive 10x than a normal bracket
Alternative to Self Ligation
•URA
•EOT
•TPA
•Edgewise appliance
•Lip bumpers
• Retention
