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 (D)</p> Signup and view all the answers

What is the function of a rotary bur?

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

At what speed range does a medium speed handpiece operate?

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

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

<p>Shank (A)</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 (A)</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 (D)</p> Signup and view all the answers

When is the runout dynamic test increased?

<p>When the bur is bent (B)</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 (A)</p> Signup and view all the answers

Which instrument is commonly used for gold foil?

<p>Straight fissure (C)</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 (B)</p> Signup and view all the answers

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

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

What is the main function of cavity varnish?

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

What is a disadvantage of using cavity varnish?

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

When is flowable resin used as a base?

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

What is a notable property of zinc oxide eugenol?

<p>Neutral pH (C)</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 (B)</p> Signup and view all the answers

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

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

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