D Material Flashcards

1
Q

Requirements of impression materials

A
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2
Q

Impressions DEF:

A
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3
Q

Trays & types

A
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4
Q

Function of Primary Cast

A
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5
Q

Function of Secondary Cast

A
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6
Q

Stock tray -> ______

A
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7
Q

Special tray-> ______

A
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8
Q

Elastic & Flexible (requirements)…

A
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9
Q

Classification of impression materials:
Rigid

A

According to elasticity after setting

-

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10
Q

Classification of impression materials:
Elastic

A

According to elasticity after setting

-

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11
Q

Classification of impression materials:
Physical reaction

A

According to setting reaction

-

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12
Q

Classification of impression materials:
Chemical reaction

A

According to setting reaction

-

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13
Q

Thermoplastic material DEF

A

Soften when heated
Hardens when cooled

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14
Q

Thermoplastic material used for..

A
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15
Q

Impression compound TYPE 1 & uses

A
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16
Q

Impression compound TYPE 2 & uses

A
17
Q

Composition of Impression compound:

A
  • Thermoplastic materials
  • fillers
  • plasticizer
  • coloring agent
18
Q

Filler’s purpose in impression compounds

A

To give body and suitable working consistency

Ex. Talc

19
Q

Thermoplastic purpose in impression compounds

A

To give thermoplasticity, flow and cohesion

Ex. Natural resin and waxes

20
Q

Plasticizer purpose in impression compounds

A

To act as lubricant and control consistency (+fillers)

Ex. Stearin