Restorative Dentistry and Dental Materials

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1. During the restoration of a particularly deep cavity in the upper left first premolar tooth, the dentist must carefully remove the caries overlying the pulp chamber, without causing an exposure. Which one of the following instruments is used to achieve th

  • Flat plastic instrument
  • Ball-ended burnisher
  • Friction grip diamond fissure bur
  • Spoon excavator
  • Enamel chisel
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2. While a crown is being manufactured in the laboratory, the dentist will need to fit a temporary crown over the prepared tooth. Which one of the following materials is not used in temporary crown construction?

  • Plastic
  • Stainless steel
  • Chrome cobalt
  • Aluminium
  • Polycarbonate

3. Amalgam is a commonly used dental material for the restoration of cavities, in posterior teeth particularly. What is the main constituent of the alloy powder?

  • Silver
  • Zinc
  • Mercury
  • Copper
  • Tin

4. Amalgam is possibly the most widely used permanent filling material for posterior teeth. Its alloy constituents can be varied to produce a mix that is less likely to discolour with time in saliva. Higher levels of which one of the following materials are

  • Silver
  • Copper
  • Zinc
  • Mercury
  • Tin

5. When placing a plastic restoration, the dentist often uses a matrix system to prevent the creation of an overhang on the resultant filling. Which one of the following is most likely to require a Siqveland matrix outfit?

  • Class II
  • Class V
  • Class IV
  • Class III
  • Class I
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