Term
| What are indirect restorations? |
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Definition
| Restorations that are constructed outside the mouth usually in a dental lab |
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Term
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Definition
| not removable or cemented in place |
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Term
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Definition
| Inside the crown do not restore cusps |
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Term
| How much tooth structure do inlays replace? How are they retained? |
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Definition
-Replace small to medium amounts of tooth structure
-Retained by cementation |
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Term
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Definition
-restore on or more cusps and oftentimes entire occlusal surface
-Replace more tooth structure than inlays |
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Term
| What are onlays retained by? |
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Definition
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Term
| What are veneers? Where are they placed? |
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Definition
-Thin layer of material, like a shell
-Placed on facial surfaces of anterior teeth to correct an esthetic problem (discolored teeth, diastemas) |
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Term
| What are direct veneers? Is a lot of tooth structure removed? |
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Definition
| bonded composites (not a lot of tooth structure removed) |
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Term
| What are indirect veneers? |
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Definition
| made of porcelain, a lot of tooth structure removed, not reversible |
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Term
| Where are indirect veneers fabricated? What is needed to make them? |
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Definition
| Fabricated in lab, 2 appointments needed, impressions |
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Term
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Definition
-Restore teeth that have lost a lot of tooth structure
-When tooth needs to be held together |
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Term
| What do dental bridges replace? |
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Definition
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Term
| What is the crown support on either end of a bridge called? |
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Definition
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Term
| What are the teeth that support retainers called? |
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Definition
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Term
| What are the replacement teeth in dental bridges called? |
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Definition
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Term
| What are metal restorations fabricated by? |
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Definition
| casting procedures: melting metal and pouring into a mold. |
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Term
| What product is this: simulate natural colors and translucency of teeth |
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Definition
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Term
| What is the downside to ceramic? |
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Definition
| Poor toughness and fracture resistance |
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Term
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Definition
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Term
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Definition
| particle and fiber reinforced materials have been developed, but are not widely used |
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Term
| What could make the long term success of restoration questionable? |
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Definition
| Periodontal status without stable foundation |
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Term
| What must be done before placing an indirect restoration? |
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Definition
| Assess the vitality of the pulp |
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Term
| What do we need to reduce the risk of before placing an indirect restoration? |
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Definition
| recurrent decay or it will be likely to fail |
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Term
| What may badly broken down teeth need before a prep? |
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Definition
| buildup or core before prep |
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Term
| What does the preparation of teeth depend on? |
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Definition
| depending upon particular restoration |
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Term
| What is an impression taken of before creating an indirect restoration? |
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Definition
| prep, adjacent teeth, and opposing teeth |
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Term
| What is cemented during appt that tooth is prepped? |
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Definition
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Term
| Where is the design of a restoration written? |
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Definition
| a laboratory prescription |
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Term
| What happens at the second appointment? |
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Definition
| Second appt. temp crn is removed and temporary cement cleaned from around tooth |
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Term
| What is done before a restoration is added to teeth? |
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Definition
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Term
| What are proximal contacts checked with? |
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Definition
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Term
| What are margins examined with? |
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Definition
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Term
| What is occlusion evaluated with? |
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Definition
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Term
| After the esthetics are accepted by the patient what is done? |
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Definition
| the restoration is cemented with permanent cement |
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Term
| What are some examples of noble metals? |
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Definition
| gold, platinum, palladium, and other inert metals |
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Term
| What do precious metals include? |
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Definition
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Term
| What are metal alloys classified based on? |
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Definition
| Are classified based on cost |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
| high gold or noble alloys |
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Definition
| 1. Contain 60% or more gold or other noble metal |
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Term
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Definition
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Term
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Definition
| White in color and contain 70% silver and 25% palladium |
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Term
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Definition
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Term
| What do metals for PFM's need to be like? |
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Definition
| Metal needs to withstand high porcelain firing temperatures and not distort |
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Term
| What is the noble alloy of choice? |
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Definition
| around 50% gold and 40% palladium |
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Term
| What is a good thing about nonprecious alloys and what are they made of? |
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Definition
Much less expensive than noble alloys
Around 80% nickel and 10% chromium |
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Term
| What is porcelain sintering? |
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Definition
| Sintering changes the porcelain from a powder to a solid (firing- same process used to make clay pots) |
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Term
| What are partial dentures made from? |
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Definition
| Made from nickel-chromium and cobalt-chromium alloys |
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Term
| What is silicate used for with partial dentures? What is a downside to it? |
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Definition
| Silicate used to cast high-melting partial denture framework, more difficult to use |
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Term
| What were the first all –ceramic restoration used in dentistry? |
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Definition
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Term
| What are porcelain fused to metal crowns like? |
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Definition
| stronger because of metal framework and can get better fit around tooth because it is malleable |
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Term
| What does it mean if a product is malleable? |
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Definition
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Term
| What is a downside to porcelain fused to metal crowns? |
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Definition
| Not as natural or life-like because metal is opaque |
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Term
| What was added to increase the strength of porcelain fused to metal crowns? |
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Definition
| Alumina oxide added to increase strength but did not improve margins |
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Term
| Is castable glass used much? Why? |
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Definition
| Castable glass is too weak for many clinical needs |
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Term
| What are: IPS /Empress and In-Ceram |
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Definition
| brand names of pressed ceramics |
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Term
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Definition
| improved strength due to strong dense core of ceramic material |
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Term
| What is CAD/CAM? What requires CAD/CAM? |
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Definition
| computer aided design and manufacture zirconium oxide crowns (Bruxer)(computer impression instead of physical) |
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Term
| What are some advantages and disadvantages of metal restorations? |
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Definition
-least likely to fracture, for high stress areas of mouth
-esthetics not great |
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Term
| What are some advantages and disadvantages of ceramic restorations? |
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Definition
-likely to fracture
-good for low stress areas (anterior teeth) best esthetics of all |
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Term
| What are some advantages and disadvantages of porcelain fused to metal? |
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Definition
| used in all areas good esthetics, sometimes porcelain will fracture |
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Term
| What is a bad thing that porcelain (ceramics) do? |
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Definition
| will wear enamel of opposing teeth |
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Term
| Casting techniques for metal result in BLANK margins than ceramic. |
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Definition
| Casting techniques for metal result in better margins than ceramic. |
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Term
| What do adhesive materials do? |
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Definition
| fill in the gap between margin of restoration and tooth surface of ceramic restorations |
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Term
| What is our job as dental hygienists? |
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Definition
| Explain pros and cons of each type of material to patient so they can make an informed decision |
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