Anchorage Flashcards
1
Q
Give the definition of anchorage.
A
Anchorage is the resistance to unwanted tooth movement.
2
Q
Name the types of anchorage and give examples.
A
- Simple: 1 tooth against another.
- Compound: more than one tooth in an anchor unit.
- Reciprocal: equal force applied to equivalent teeth which leads to equal movement towards each other.
3
Q
Name methods to increase anchorage.
A
- TADs/implants
- Bonding the 7’s
- TPA with/without Nance button
- Lingual arch
- Intermaxillary elastics
- URA/Functional
- Extraction pattern
- Headgear
4
Q
What are the reasons for a loss of anchorage?
A
- Incorrect treatment plan.
- Poor patient compliance (eg elastics).
- Starting space closure too soon.
- Incorrect mechanics
- Ankylosis
5
Q
How much force is required to create a TIPPING movement?
A
35-60g
6
Q
How much force is required to create a BODILY movement?
A
70-120g
7
Q
How much force is required to create a EXRTUSION movement?
A
35-60g
8
Q
How much force is required to create a INTRUSION movement?
A
10-20g
9
Q
How much force is required to upright a root?
A
50-100g
10
Q
How much force is required to create a ROTATION movement?
A
35-60g
