Waxes Flashcards
1
Q
Waxes soften when heated - what is this termed?
A
Thermoplastic
2
Q
Waxes have a high degree of what?
A
Thermal expansion
3
Q
What is the high degree of thermal expansion of wax due to?
A
Due to weak secondary valence forces and transition points
4
Q
What are residual stresses in wax?
A
Internal stresses - independent of applied forces
5
Q
What are residual stresses usually a result of?
A
Non-uniform heating and cooling
6
Q
What is recovery of residual stresses in wax?
A
Change in shape resulting from release of residual stresses
7
Q
What four characteristics are common of all waxes?
A
They have a melting range, tendency to flow, have residual stresses, and the largest CTE of all dental materials
8
Q
What is CTE?
A
Coefficient of thermal expansion
