Fixed Appliances

Question 1

List 6 instructions you would give to a patient on the placement of intra oral
elastics?

Answer 1

1. Wear as shown.
2. Do not copy friends if you are unsure of arrangement, call and ask.
3. Wear for the time specified – part time or full time
4. Remove to clean teeth
5. Replace daily
6. If one breaks replace both

Question 2

What dietary advice would you give a patient that has fixed braces?

Answer 2

• Aviod hard and sticky foods that may break the brace
• Remove elastics if struggling to eat with them in but place back in after.
• Avoid sweet snacks between meals
• Avoid sugary or high acidic drinks, keep to meal times if you do have one as
treat and use a straw

Question 3

What are the 2 types of self ligating brackets?

Answer 3

Active and passive

Question 4

List 4 advantages of self ligating bracket?

Answer 4

• Less friction
• Wire fully engaged in the bracket slots
• No external ligation required – reducing plaque traps – helping OH.
• Less chairside time required

Question 5

List properties of a stainless steel archwire, which make it a popular choice in the later stages of treatment?

Answer 5

•Strong
•Formable
•Cheap
•Low springback
•Low biohost
•Low friction, sliding mechanics
•High stiffness- resisting deformation by intra and extra oral forces.
•Good space closure due to low friction and stiffness.
•Joinability good, can solder hooks for CI space closure.
•Corrosion resistance

Question 6

4 methods of active space closure

Answer 6

Chain
Niti coil springs
Burman ligature
E-links

Question 7

Ways to close space?

Answer 7

Sliding mechanics
Closing loops on AW
En masse space closure
Distalising canine into class 1 with 2 stage space closure

Question 8

Why bond 7’s

Answer 8

Levelling curve of spee
Decrease overbite
Provide better anchorage
Straighten them
Orthognathic surgery
Expansion