Final Exam Flashcards
What are types of restorative materials for teeth?
- Dental amalgam
- Composite materials
- Gold restorations (gold foil)
- Gold castings (inlays, onlays, crowns)
- Ceramics (crowns, bridges, veneers)
What are concerns about dental amalgam as restorative material?
- Poor esthetics compared to resin composites
- Weakening of tooth from removal of tooth structure
- Recurrent caries
- No adhesive bonding unless bonded restoration
- Sensitivity of properties to manipulation
- Brittle nature of material
- Biocompatibility (generally not considered a problem with patients)
- Wastewater pollution with mercury
What are the advantages of dental composite?
- Aesthetics (composites are tooth colored)
- Bonding to tooth structure (strengthens the tooth’s structure)
- Can be more conservative in the preparation of th e tooth
- Less expensive than a ceramic restoration
- Reduced mercury exposure for the patient and the dentist
What are the disadvantages of dental composite?
- Composite shrinkage (when you cure with the light)
- Secondary caries
- Durability (in some situations composite fillings may not last as long as amalgam fillings)
- Chipping (composite material can chip off the tooth)
- More skill and training required
- Need to keep working area in mouth completely dry
- Time and expense (it takes an average of 20 minutes longer or restoration)
What does bonding allow the dentist to do?
Use dental composites on teeth to change shape, color, or contours
What is the oldest type of filling material available?
Gold foil/direct gold
True or false: in some situations, gold foil can last the lifetime of the patient.
True; pure gold can be placed in one visit in small cavities and will last longer than any other restorative material
What are the different types of crowns?
- Cast gold
- Per Elwin fused to metal
- High strength ceramics
What is the cost of gold?
Average cost of metal in a cast gold crown ins $250 in todays market but can be over $300; in august 2020 it was $1754 per ounce
How long will porcelain-fused-to-metal (PFM) crown last?
95% success rate between 5-10 years in cross-sectional; 97.5% success rate at 7 years; 95.5% at 7 years assessed in private practice
(So about 95% success rate)
What are examples of tooth replacements?
Complete dentures (with implants), partial dentures (with implants), fixed bridges and single teeth (with implants)
What are advantages of high strength ceramics?
- Broad range of indications
- Excellent clinical performance
- Accepted metal alternative
- Less tooth reduction required
- Thinner coping thickness
- Shaded coping options offer improved esthetics
How d you do a porcelain application?
- Apply dentin modifier, opaceous dentin, and dentin
- Apply Mamelons and translucent porcelain between the lobes
- Apply translucent and opal enamel to the incisal area
- Finish and glaze
