Zinc phosphate cement liquid should NOT be discarded when:
a. The liquid has been left unstoppered for a long time.
b. The liquid is discolored.
The liquid is down to the last 30 percent in the bottle.
List advantages of zinc phosphate as a cementing medium.
a. ____________________________ appearance.
b. Speed and ________________ of usage.
Sufficient flow to form a thin _____________________ for cementing.
List disadvantages of zinc phosphate as a cementing medium.
a. ______________________ crushing strength.
b. __________________________ solubility in mouth fluids.
__________________________ material (not suitable for visible surfaces).
The compression strength of zinc phosphate cement is between:
a. 12,000 and 19,000 psi.
b. 21,000 and 29,000 psi.
30,000 and 52,000 psi.
Zinc phosphate cement will take longer to harden when:
a. Less powder is used.
b. More powder is used.
Powder in equal amounts is used.