Cements Flashcards
What are the two most important factors in an ideal cement?
High compressive strength
-High elastic modulus
What is film thickness?
-A measure of viscosity
When using a powder/liquid cement what is an important concept that you need to remember?
-No powder remnants in mix
What are the characteristics of zinc polycarboxylate?
- Kind to pulp
- Quite soluble
- Good intermediate strength
- Inexpensive
- Easy to mix
- Not technique sensitive
- Acidic (large acidic polymer molecules cannot penetrate dentinal tubules
- Weak Chelation bonds to calcium ions of enamel and dentin
- Unlimited shelf life
- Distilled water is the liquid component
What are characteristics of zinc phosphate?
- Technique sensitive
- Early acidity can be irritating to pulp
- Inexpensive
- Excellent compressive strength
- Long history of success
- Time consuming to mix
- Moderately soluble when mixed properly
What type of cement do you mix on cold glass slab to slow exothermic reaction and done incrementally?
-Zinc phosphate
What are the properties of adhesive resin cements?
- Usually chemical cure
- Limited shades
- Bonds to many surfaces
- Strongest of bonds
Which of the resin cements do you use with a separate bonding agent?
-Esthetic
What do you use esthetic resin cement for?
- Veneers
- Lithium disilicate onlays
- Lithium disilicate crowns
- Zirconia crowns
Do you apply both the base shade and the catalyst when cementing veneers?
-Just the base shade, no catalyst
