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14 Cards in this Set
- Front
- Back
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A provisional must...
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-protect the tooth and tissue
-prevent 3d movement - adjacent teeth and tooth you are working on must not move either. must have proximal contact, maintain occlusion, and stay in place. - be comfortable and esthetic where appropriate -last long enough - may be worth having lab make a processed one. depends on expectations. -be a diagnostic tool - get used to phonetics and esthetics of the new bridge. -not take too much time. |
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Material choices..Name 4 types
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1. Methylmethacrylate acrylic - Alike.
2. Bis-acryl - Alike is slowly being rpaced by this. Its composite like. 2 most popular crown and bridge, inlay or onlay = methylmethacrylate based or bis acryl based. bis acryl - low quality composite. no monomer, not as much heat generated. more expensive, more brittle. 3. Direct light cured - dont do a great job of preventing movement. small 2 surface inlays mostly. 4. pre made shells |
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Technique choices - 4 types
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1. free hand block - cheap, good learning tool for dental anatomy.
2. template (which type?) - matrix technique. vacuform plastic or silicone putty. doesn't require a lot of artistic talent. 3. direct light cured 4. relined pre made shell |
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Block temp...
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Requires methylmethacrylate. Bisacryl materials cannot be used for a block temp.
Alike goes through 4 stages 1. very wet, sticky - flows well 2. Doughy stage (bisacryls don't have this stage) 3. Rubbery stage - flexible. Doesn't flow anymore. 4. Fully set stage. |
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Using monomer...
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-use only what you need
-recap it quickly -keep it away from the edge -keep it away from patient |
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When do you tease it out?
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Late rubbery stage, especially for inlays.
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What will teasing if off cause?
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Causes some distoration.
-relining is always necessary except for extremely small inlays. Only for ceramic inlays. |
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What does warm water do?
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helps the block temp set faster.
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What are the advantages of the lathe?
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1. faster
2. less likley to have temp goes flying 3. much safer to use 4. saves the motor on the low speed handpiece. |
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What do you do after the gross reduction of the temp?
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Acrylic bur will remove the internal surface and external to go into place. Won't seat perfectly.
-Adjust into MIP before you reline it. |
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During reline, what should patient do?
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Bite down really hard. Want the excess to come out.
Reline is almost always required due to distortion and shrinkage. Reline is designed to compensate for this. |
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Dont' forget to do the following:
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normo occlusion in MIP
-no excursive contacts -margin to margin -no open contacts -polished and comfortable |
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Temporary cements
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1. ZOE (Kerr's temp bond)
2. non eugenol ZO cements? Eugenol negatively affects the polymerization of resin. it decreases rate of polymerization. 3. resin cements 4. polycarboxylate and vaseline 5. post op instructions |
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Taking the impression
Most important part? What does elastic mean for this? |
Most important - dimensional accuracy/ precise detail
-beyond the margin - how many teeth? full arch tray - all maxillary or mandibular teeth. -elastic and tough.; the impression when its placed in the mouth and sets, will not distort when you remove it = this is what elastic means. Tough = PVS -dimensionally stable: once impression is made and take it out, it shouldn't lose water. Alginate is not dimensionally stable. Doens't need to be poured up right away. |
