Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BDS4 ORTHODONTICS > Fixed Orthodontic Appliances > Flashcards

Fixed Orthodontic Appliances Flashcards

1
Q

What are fixed appliances?

A

Appliances that are fixed/bonded to teeth & cannot be removed by patient
- consists of brackets, bands, arch-wires & auxiliaries
- can performed precision movements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When do we use fixed appliances?

A
  • correction of mild to moderate skeletal discrepancies (camouflage)
  • alignment of teeth
  • correction of rotations
  • centreline correction
  • overbite & overjet reduction
  • closure of spaces / creating spaces
  • vertical movement of teeth
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are Andrews six keys?

A
  • tight approximal contacts with no rotations
  • class I incisors
  • class I molars
  • flat occlusal plane or slight Curve of Spee
  • long axis of teeth have a slight mesial inclination except lower incisors
  • crowns of canines back to the molars have a lingual inclination
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the components of fixed appliances?

A
  • bracket/tube
  • band
  • archwire
  • modules
  • auxillaries (elastomerics or springs)
  • anchorage components
  • force generating components
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is normally used to fix molar bands to teeth?

A

GIC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the components of orthodontic brackets?

A
  • bracket slot
  • tie wings
  • bracket base
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What materials are used to make orthodontic brackets?

A
  • metal
  • polymers
  • ceramics
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is torque?

A

buccal-lingual angulation of tooth
- based on thickness of bracket base

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is tipping?

A

mesial-distal angulation of tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How are brackets attached to teeth?

A

Micromechanical retention
- photoinitatior reaction using light cure composite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What archiwire materials are used?S

A
  • stainless steel
  • nichel titanium (NiTi)
  • cobalt chromium
  • beta-titatium
  • composite/glass
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When picking the material for archwire, what DMS component is essential?

A

SHAPE MEMORY!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why is NiTi ideal for orthodontic archwire?

A
  • flexible
  • light continuous force
  • shape memory
  • higher fraction than SS
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why is Stainless Steel used for orthodontic archwire?

A
  • working archwire to slide teeth (low friction)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the force generating components of fixed orthodontic appliances?

A

Sliding mechanics:
- elastic power chain
- NiTi coils
- intra-oral elastics
- active ligature

Teeth move by utilising the energy stored in the elastic or spring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the issue with elastomerics in orthodontics?

A

They degrade quite easily & dont tend to last very long

17
Q

What is anchorage?

A

Resistance to unwanted tooth movement

18
Q

What is compound anchorage?

A

Increasing anchorage by linking teeth together (done via long ligatures)

19
Q

What is reciprocal anchorage?

A

Equal anchorage (e.g closing diastema, both incisors have equal anchorage)

20
Q

How do we achieve “absolute anchorage”?

A

Temporary Anchorage Devices (TADS)
- non osseointegrating mini screw

21
Q

What can we use to gain cortical anchorage in ortho?

A
  • Transpalatal arch
  • Nance arch
22
Q

How is intermaxillary anchorage achieved in orthdontics?

A

Bonding upper & lower arch with elastics
- different malocclusions have different band placements

23
Q

What is the function of retainers?

A

maintaining the final tooth position with a passive orthodontic appliance

24
Q

What malocclusion features have high relapse potential?

A
  • diastema/space closure
  • rotations
  • palatally ectopic canine
  • proclination of lower incisors
  • anterior open bite
  • instanding upper lateral incisors
25
Q

Name a removable retainer:

A

Hawley retainer (1920s)

26
Q

What malocclusion features typically require fixed bonded retainer after fixed ortho is finished?

A
  • space closure
  • diastema
  • proclination of lower labial segment
  • periodontal cases
  • ectopic canines
  • instanding upper 2s
27
Q

What are the main risks with fixed appliances?

A
  • decalcification
  • root resorption
  • relapse
  • damage to enamel
28
Q

What do patients typically complain about during fixed ortho treatment?

A
  • pain
  • mucosal irritation
  • ulceration
  • appliance breakage
29
Q

What is a GDPs role in fixed orthodontic treatment?

A

See patient for routine care & check ups
- reinforce OHI & diet advice
- liaise with orthodontist if concerned
- make appliance safe in orthodontic emergency

BDS4 ORTHODONTICS (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions