fixed appliances ortho 1

Question 1

types of tooth movement

Answer 1

tipping - mainly just crown movement
bodily - crown and root
extrusion/intrusion
torque - movement of root of tooth
rotation

Question 2

problems with fixed applaicnes

Answer 2

enamel demineralisation/caries
root resorption
soft tissue lacerations
periodontal probelms
unwanted tooth movements
pulp devitlasation

Question 3

fixed appliance components

Answer 3

brackets
molar tubes/bands
archwires
auxiliaries

Question 4

components of brackts

Answer 4

tie wings

slots

Question 5

rectangular arch wire

Answer 5

3D control
19x25 arch wite
used for final alignment and space closure

Question 6

plastic brackets disadvantage (historic)

Answer 6

prone to fracture
discoluration
distortion

Question 7

ceramic brackest

Answer 7

aesthetics
can fracture during use and debonding
abrasion of other teeth if touching opposing arch
cost
friction

Question 8

how do molar tubes bond to the tooth

Answer 8

direct bond

no need for separators

Question 9

archwire functions

Answer 9

active archwires

passive archwires

Question 10

active archwites

Answer 10

• engage onto bracket
• move teeth with wire
• light forces
• flexible
• generally use nickel titanium, can have round and rectangular

Question 11

passive archwires

Answer 11

• move teeth along with wire (teeth themselves move along the wire)
• rigid
• stainless steel, once teeth aligned can be used for bodily movement of teeth

Question 12

materials of archwires and ad/dis

Answer 12

nickel titanium (used for alignment, shape memory, elastic, heat activated)
SS (rigid, can maintain arch form)

Question 13

cross section of witres

Answer 13

round 0.012-0.018

rectangular 0.018/9-0.025

Question 14

elastic modules

Answer 14

hold arch wire in place

Question 15

auxiliaries

Answer 15

elastic

springs

Question 16

elastic

Answer 16

elastic bands
powerchain
zing string
e links
traction ligatures

Question 17

powerchain

Answer 17

used to close space

attached to each individual tooth

Question 18

elastic bands

Answer 18

help pull in a certain direction

often used between upper and lower arch

Question 19

zing string

Answer 19

used as a method of traction

Question 20

e linke

Answer 20

for space closure

Question 21

traction ligatures

Answer 21

module that is attached to ss ligature
space closure

Question 22

springs

Answer 22

closing coil/traction springs

push coil/coil spring

Question 23

push coil/coil spring

Answer 23

in between two teeth

push teeth apart to make space

Question 24

closing spring

Answer 24

small springs

- alternative to traction ligatures for space clisure

Question 25

Adams plier use

Answer 25

making bends in archwires

adjusting clasps on removable applainces

Question 26

crown shears

Answer 26

cutting ends of quick ties

Question 27

Weingart

Answer 27

for gripping archwires