7 - Waxes Flashcards Preview

Dental Materials! - Nov Edition > 7 - Waxes > Flashcards

Flashcards in 7 - Waxes Deck (4)
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1
Q

7.2 - Are waxes thermoset or thermoplastic materials?

A

They are thermoplastic

2
Q

7.9 - Waxes have a large ability to expand in volume in response to temperature - what do you call this property and what explains why waxes have this property?

A

Thermal expansion

They have a high degree of thermal expansion due to their weak secondary valence forces and transition points.

3
Q

7.14 Define residual stress

A

They are internal stresses independent of applied forces - usually a result of non-uniform heating and cooling

4
Q

7.26 What properties do all waxes have?

A
  1. All have a melting range (not a single melting point)
  2. All have a tendency to flow
  3. All possess residual stresses
  4. All have the largest CTE of all dental materials (coefficient of thermal expansion)