Final cements summary p143

Question 1

compressive strength- greatest to least

Answer 1

resin > glass ionomer > zinc phosphate > polycarboxylate > ZOE

Question 2

solubility- lowest to highest

Answer 2

resin > glass ionomer > zinc phosphate > polycarboxylate > ZOE

Question 3

film thickness is dependent on?

Answer 3

1) P/L ratio
2) powder particle size
3) pressure generated during seating of casting

Question 4

what is the most important clinical property of cement?

Answer 4

solubility! Generally a cement dissolves when a solvent attacks the matrix. however, with polycarboxylate cement both the matrix and powder are attacked.

Question 5

increasing P/L ratio has what effects on cement?

Answer 5

1) compressive strength increases
2) solubility decreases
3) film thickness increases
4) biocompatibility is improved