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Dental Materials
Final Review
| Question | Answer |
|---|---|
| T/F: If an alginate (irreversible hydrocolloid) impression is not successful you can reuse by reheating? | False |
| What are ways to improve comfort? | Quick setting alginate Select and try in a different sized tray Push tray into place more firmly Alter the tray by trimming the edges Pad the edge of the tray with some soft wax |
| What will extra water do to impression material? | Will make it weaker and make the setting time slower. |
| What will give you more time with alginate? | Cold water will allow it to set slowly giving more work time in the mouth. |
| What is a disadvantage of working with cold water? | Doesn't set in a good manner of time to keep the patient comfortable. |
| What ways could you make plaster set up faster? | heat it up using a blow dryer on low setting, |
| What ways could you make plaster set up slower? | refrigerate the water to make is cold |
| For cementing a gold crown, which of the following would be an undesirable cement? | cement that shrinks it will form gaps that will become a plaque trap. |
| For a porcelain crown which of the following would be an undesirable cement characteristic? | cement that expands as it sets, you want it to be a neutral as possible. |
Created by:
daisenmurray
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