lecture 4

Question 1

composition of alloy powder in amalgam?

Answer 1

65% Ag, 29% Sn, 6-30% Cu, <1 Zn

Question 2

(β + γ) + Hg –> γ1 + γ2 + unreacted (β + γ)

Answer 2

ye

Question 3

study slide 10

Answer 3

ye

Question 4

significant parameters of dental amalgams?

Answer 4

Compressive strength improved with high Cu content
Dimensional Change: balance between
Dissolution of γ contraction
Formation of γ1 and η expansion
Go back to crystallography (crystal structure)
Also lead towards expansions