1) Adams Clasp Flashcards Preview

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Flashcards in 1) Adams Clasp Deck (16):
1

What are the elements of a removable appliance?

Active components

Retentive components

Anchorage

Baseplate

2

Describe retention?

Capacity of an appliance to remain fixed in the mouth

Retention needs an undercut

3

Give examples of some retentive appliances?

Adams clasp - posterior teeth

Southend clasp - anterior teeth

Labial bow

4

What are retentive components made of?

Adams clasp - 0.7mm wire (posteriors) may be made with 0.6mm wire (premolars)

Southend clasp - 0.7mm wire (anteriors)

Labial bow - reversed loop - 0.8mm (anteriors)

Baseplate is made from acrylic resin

5

Are these clasps retentive?

Q image thumb

No - do not engage in the undercut

6

What are the component parts to a clasp?

A bridge

2 arrow heads

2 flyovers

2 tags

7

What are arrowheads?

Clasp retention comes from the arrowhead engaging into an undercut

8

What is wrong with this clasp?

Q image thumb

Bridge too low

9

What is wrong with this clasp?

Q image thumb

Bridge too short

10

What is wrong with this clasp?

Q image thumb

Bridge too close and arrowheads are too small

11

What is wrong with this clasp?

Q image thumb

Arrowheads too low causing tissue trauma

12

What is wrong with this clasp?

Q image thumb

Flyover too high - inteferes with the occlusion

13

What is wrong with this clasp?

Q image thumb

Distal flyover will interfere with eruption of 2nd molar

14

What is wrong with this clasp?

Q image thumb

Not close enough to distal of 1st molar

15

What is wrong with this clasp?

Q image thumb

Retention tags too close together

16

Describe the importance of the adams clasp?

Good retention

By far the best design for posterior teeth

Easy to make a poor adams clasp

Important to recognise various faults