incorrect cards (0)
correct cards (0)
remaining cards (0)
retry
show Answer first
restart
shuffle
help
0:01
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
show me how
Normal Size Small Size
show me how
Normal Size Small Size
DENTAL MATERIALS
Provisional Restoratives
| Question | Answer |
|---|---|
| What are provisionals? | temporary crowns or bridges |
| How long can provisionals be used safely? | from 2-26 weeks |
| Preformed provisionals: | stainless steel, aluminum, polycarbonate crowns, celluloid |
| Why is stainless steel used as a provisional and what was it traditonally used for? | It's the most durable and can last for years, traditionally used to restore children's teeth |
| What are other advantages of stainless steel? | malleability, cheaper, durable |
| Which teeth is aluminum shell used for and how long does it last? | posterior teeth, several weeks |
| Polycarbonate and celluloid crowns are more ----- than staninless steel or aluminum. | rigid |
| What teeth are polycarbonate or celluloid crowns used for? | anteriors |
| What tools do you need to form polycarbonate or celluloid crowns? | acrylic burs or discs |
| properties of celluloid crowns: | transparent, filled with composite or acrylic resin, match shade to tooth color |
| Zinc Oxide Eugenol can be used as a: | liner, base, permanent luting agent, impression material, endodontic sealer, periodontal dressing |
| What is acrylic usually used for? | a bridge provisional |
| What are the two ways to cure composites? | self curing and light curing |
| Define Obtudent: | sedative-like, not irritating, some antibacterial properties |
| How much zinc oxide is in zinc oxide powder? | 70% |
| Rosin: | powder that is added to zinc oxide to reinforce the temporary and make it less brittle. |
| What is ZOE cement used for? | temporary luting, mixed on a glass slab and sets by chemical reaction |
| Name the advantages and disadvantages of acrylic: | Advantages: good esthetics, easy to manipulate, low cost Disadvantages: odor, high shrinkage rate, heat from polymerization causes discomfort and can damage pulp and gingival tissue. |
| Advantages of temporary crown with composite? | low shrinkage, low heat release during curing, good strength. light or self cured |
| Why does light cured need celluloid forms? | They are clear so the light can pass through |
| When placing an acrylic provisional, how full should the clear tooth form be filled with the acrylic material? | 3/4 |
| Why is an on and off technique used when placing a provisional restoration? | because of heat produced by methyl methacrylate |
| What else could be made for creation of a temporay? | a stint |