Dental Rotary Instruments Quiz
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Questions and Answers

What does cariology primarily deal with?

  • Diagnosis and treatment of dental caries (correct)
  • Evaluation of tooth sensitivity
  • Study of gum diseases
  • Management of oral infections

    • According to the acidogenic theory, what are the two stages of dental decay?

  • Proteolysis of organic components; Demineralization of inorganic substances
  • Lysis of enamel lamellae or rod sheath; Softening of enamel and dentin
  • Formation of Streptococcus mutans; Presence of Lactobacillus acidophilus
  • Decalcification of enamel and dentin; Dissolution of softened residue of enamel and dentin (correct)

    • Which microorganism is associated with enamel caries?

  • Lactobacillus acidophilus
  • Streptococcus mutans (correct)
  • Cemental caries
  • Actinomyces viscosus

    • What is the process of formation of dental caries known as?

    <p>Cariogenesis</p> Signup and view all the answers

    What is the function of a rotary bur?

    <p>To remove tooth structure</p> Signup and view all the answers

    At what speed range does a medium speed handpiece operate?

    <p>12,000 - 200,000 rpm</p> Signup and view all the answers

    Which part of a bur is used for the initial entry to the tooth?

    <p>Shank</p> Signup and view all the answers

    What does the rake face of a bur blade refer to?

    <p>The surface of the bur blade on the leading edge</p> Signup and view all the answers

    What is the angle formed by the clearance face and rake face of a bur blade called?

    <p>Clearance angle</p> Signup and view all the answers

    When is the runout dynamic test increased?

    <p>When the bur is bent</p> Signup and view all the answers

    What is the purpose of beveling the enamel margins for composite?

    <p>To sharpen line angles and define walls</p> Signup and view all the answers

    Which instrument is commonly used for gold foil?

    <p>Straight fissure</p> Signup and view all the answers

    What is the purpose of using chlorhexidine during cavity debridement?

    <p>To ensure all debris is removed from the preparation</p> Signup and view all the answers

    What defines the working end of a hand-held instrument?

    <p>Blade (cutting instrument)</p> Signup and view all the answers

    What is the main function of cavity varnish?

    <p>Reducing microleakage and post operative sensitivity</p> Signup and view all the answers

    What is a disadvantage of using cavity varnish?

    <p>Dissolves in a matter of days or weeks</p> Signup and view all the answers

    When is flowable resin used as a base?

    <p>When remaining dentin thickness is 0.5 - 2mm</p> Signup and view all the answers

    What is a notable property of zinc oxide eugenol?

    <p>Neutral pH</p> Signup and view all the answers

    Which type of glass ionomer cement is used for pits and fissure sealant?

    <p>Type 3: Liners and bases</p> Signup and view all the answers

    What substance has a high pH compared to CaOh when unset?

    <p>Mineral trioxide aggregate</p> Signup and view all the answers

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