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BDS3 DMS > Elastomeric Impression Materials > Flashcards

Elastomeric Impression Materials Flashcards

1
Q

What are the two types of elastomers to exist?

A
  • polyether materials
  • addition silicone materials
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2
Q

How are elastomer materials formed?

A

by polymerisation with cross-linking of polymer chains

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3
Q

What is the ideal viscosity of an impression material?

A

must be able to flow readily to enter undercuts etc

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4
Q

What is the ideal surface wetting of an impression material?

A

must make intimate contact with teeth/mucosa

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5
Q

What is the ideal contact angle of an impression material?

A

small contact angle so that there are no spaces between globules of impression material

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6
Q

how can permanent strain of an impression material be lowered during use on a patient?

A

reduced load time = IMPRESSION REMOVED WITH A SHARP PULL

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7
Q

What is the ideal rigidity of an impression material?

A

ideally low (flexible)

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8
Q

What type of elastomer is Impregym Penta Soft (medium)?

A

polyether

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9
Q

What type of elastomer is Aquasil Ultra?

A

addition silicone

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BDS3 DMS (8 decks)

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