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Flashcards in Appliances Deck (31)
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1

Difference between passive and active removable appliances?

Psssive - don't move teeth
Active- move teeth

2

List 3 passive removable appliances?

Coverplate
Space maintainer
Retainer

3

List 2 active removable appliances

Functional appliance
Aligners

4

Name 4 components of removable appliances?

Active
Retentive
Anchorage
Baseplate

5

Describe the function of each component of removable appliances

Active - the component that moves the teeth

Retentive - the component that keeps the appliance in the mouth

Anchorage - the component that provides anchorage to teeth being moved

Baseplate - attaches everything together

6

What type of movement do most removable appliances cause?

Tipping

7

Advantages fo removable appliances?

Can be removed for cleaning
Relatively cheap
Very useful for limited applications

8

Disadvantages of removable appliances

Compliance
Poor oral hygiene = plaque retentive
Limited tooth movements - can only tip = no intrusion/extrusion, rotation
Lower is generally poorly tolerated

9

What criteria must patients meet to be selected for removable appliances?

Well-motivated
Good oral hygiene
No active caries
Good cooperation

10

What is a coverplate?

Passive removable appliance used post-surgical exposure of attached gingiva to maintain the dressing and aid healing

11

How should you manage a patient in practice is they have a coverplate?

Should not be removed

Stays in place for 10-14 days after surgery

12

Function of space maintaners?

Maintain space after early tooth loss for room for prosthesis or room for successor tooth

13

Most common type of retainer used?

Essix

14

Advantages of essix retainers

Quick and cheap
Good aesthetic
Less impact on speech
Effective - stop rotations especially

15

Disadvatages fo essix retainers?

Not durable, OH critical, can't eat or drink with them in, easily lost

16

Describe Hawley retainers

Acrylic baseplate with adams clasps

17

Advantages of Hawley retainers

More durable than essix, allow settling of teeth

18

Disadvantages of Hawley retainers

Compliance (more bulky), not as well fitting - mat allow relapse, more expensive

19

Advantages of fixed retainers?

Full time, compliance, good for rotations

20

Disadvantages of bonded retainers

Breakage, difficult to repair, hard for overbite in upper, OH difficult

21

How long should you advice patients to wear retainers?

Indefinitely

22

What are functional appliances?

Removable or fixed appliances that use forces generated by stretching muscles, fascia and/or periodontium to alter skeletal and dental relationships

23

When are functional appliances used?

Usually class II malocclusion

24

What is the most common type of fucntional appliance?

Twin block

25

HOw do functional appliances work for class II malocclusion?

Posture mandible forward, this generate forces to pull mandible distally which put forces of lower twin block onto upper twinblock, this pulls maxillary teeth posterior and anterior forward (procline)

26

What role do GDPs have in terms of functional appliances?

OHI
Motivation - difficult to wear
Appropriate referral

27

What is an appropriate referral for functional appliances?

Active growth - F = 11-13, M = 12-14
Class II
OJ > 6mm

28

Advantages of fixed appliances?

Better for complex cases
Bodily movement
Compliance is less of an issue
Does not effect speech

29

Disadvantages of fixed appliances?

Need very good OH
Diet restrictions
Cause root resorption
Need skill/training

30

Components of fixed applainces?

Bracket (on tooth)
Archwire - flexible or rigid
Ligature (wire tie)
Molar bond
Auxiliaries - elastics, springs