DENTAL MATERIALS Word Scramble
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| 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 |
Created by:
karmstrong1