ortho anchor

Question 1

orthodontic anchorage

Answer 1

resistance to unwanted tooth movement

Question 2

what provides orthodontic anchorage

Answer 2

Other teeth and the palate/head/neck/screws in bone somtimes

Question 3

what is the optimal force for moving a tooth

Answer 3

Lightest force that produces tooth movement at a near maximum rate

Question 4

what happens as you increase the PDL volume over which a reaction force is distributed relative to the tooth trying to move

Answer 4

Greater the relative movment

Question 5

what is the ratio between PDL pressures for the movemment tooth and anchor teeth

Answer 5

3:1 (larger anchors are better)

Question 6

what happens to the anchor if you increase force toomuch

Answer 6

Burning of the anchorage (makes anchorage control impossible)

Question 7

what teeth make the best anchors

Answer 7

Larger teeth

Question 8

what is the simplest anchorage

Answer 8

Reciprocal anchorage

Question 9

what is reciprocal anchoage

Answer 9

movememtn of one tooth is pitted against one exactly like it or with the same anchorage value

Question 10

when to use reciprocal anchorage

Answer 10

close maxillary diastema

Question 11

what is the result of reciprocal anchorage

Answer 11

Movement towards each other at the same rate

Question 12

what is reinforcing the anchorage

Answer 12

when you add more teeth to the anchor so the teeth trying to move are moved and the anchor teeth are not moved
- can include headgear outside the arch( but rarely)

Question 13

what is stationary anchorage

Answer 13

using bodily movement on the anchor to serve as an anchor so it doesn’t really move that far

Question 14

how much force to use for a stationary anchorage

Answer 14

Below the optimal force

Question 15

how fast does cortical bone remodel compared to medullary

Answer 15

Cortical Remodels much slower

Question 16

how to do space closure by sliding

Answer 16

first retract canine

add to posterior anchorage unit as incisors are retract

Question 17

what is a determinate force system

Answer 17

You can measure and determine the face and moments felt by all teeth

Question 18

what does an indeterminate force system mean

Answer 18

impossible to know exactly what forces and moments are produces

Question 19

what force systems are indeterminate

Answer 19

two-couple systems

Question 20

what is a one couple system

Answer 20

couple present atone place and forces without a couple are felt elsware

Question 21

do removal appliances become two couple systems

Answer 21

No

Question 22

what tends to becomes two-couple systems

Answer 22

Multi-bracketed fixed appliances

Question 23

what does the rectabgular wire create

Answer 23

a couple within the bracket in the toqure plane of space

moves tooth around if wire is flexed

Question 24

what tends to happen to teeth as you do ortho

Answer 24

TEnds to be extrusive

Question 25

how to set up an appliance for intrusion

Answer 25

must bypass teeth
2x4 appliance (2 molars, 4 incisors)

Question 26

when cant you intrude teeeth

Answer 26

With cont arch wire

two couple systems

Question 27

can you move ankylosed teeth

Answer 27

No

Question 28

what odd things make good anchors

Answer 28

Ankylosed teeth

implants

Question 29

youngest to get temporary skeltal anchors

Answer 29

11

Question 30

what are the types of Remporary skeletal anchors

Answer 30

bone screws in alveolar bone

Miniplates attached to basal bone beneath the teeth by multiple bone screws

Question 31

why use miniplants over bone screws

Answer 31

when more extesnive movement needed

Question 32

why use temporary skeletal anchors

Answer 32

• Position individual teeth when no anchor avaiable
• Intrsuion of posterio teeth to close ant open bite
• retract and intrude protruding maxillary incisors
• distal movement of molars

Question 33

how to restract max incisors with TADs

Answer 33

• Using bone screws in palate to stabilize lingual arch
• using bone screws in the alveolar process posteriorly
• using mini-plates placed at the base of the zygomatic arch (arm projecting into vesibule)

Question 34

where must bone screws be attached

Answer 34

attached gingiva

Question 35

what kind of force do bone screws struggle with

Answer 35

Vetricle foce

Question 36

what happens if you use a miniplate anchorage against the zygomatic buttress above the roots of the teeth

Answer 36

CAn move the entire maxilary arch posterior if space is avaialable (need to remove 3rd molar, sometimes second molar)