Dowel Types in Dentistry Lecture
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Questions and Answers

What is the primary purpose of a dowel?

  • To reinforce the tooth structure
  • To prevent coronal fractures
  • To provide retention and resistance for the restoration (correct)
  • To assist in caries removal
  • How is a pre-fabricated dowel added to a prepared canal space?

  • Cemented and then a core is added (correct)
  • Molded intraorally and sent to a lab for casting
  • Fitted with an artificial crown
  • Cemented and then cast into metal
  • In what situations might a dowel/core & crown be unnecessary?

  • In all endodontically treated teeth
  • When the tooth structure is very thin after preparation
  • In posterior teeth with extensive caries
  • When conservative retention and resistance features can be used (correct)
  • How is a cast dowel and core made?

    <p>Molded intraorally and sent to a lab for casting</p> Signup and view all the answers

    What is the definition of a dowel?

    <p>A post usually made of metal that provides retention and resistance for the restoration</p> Signup and view all the answers

    What is added to a pre-fabricated dowel after it's cemented into a prepared canal space?

    <p>A restorative material as a core</p> Signup and view all the answers

    When might a dowel/core & crown be unnecessary for endodontically treated teeth?

    <p>When there's enough remaining tooth structure for retention and resistance</p> Signup and view all the answers

    What is the GPT's (2008) view on the purpose of a post?

    <p>&quot;REINFORCE&quot; the tooth structure</p> Signup and view all the answers

    What is the main purpose of removing caries and previous restorations in tooth preparation for complete coverage?

    <p>To ensure proper fit of the crown</p> Signup and view all the answers

    In crown preparation, what is the recommended length with respect to the clinical crown length?

    <p>Equal to or longer than the clinical crown</p> Signup and view all the answers

    What is the ideal apical seal of gutta percha in root canal preparation?

    <p>4-5mm at apex of tooth</p> Signup and view all the answers

    Which surface texture is considered more retentive in crown preparation?

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

    What is the minimum recommended ferrule length for a tooth to be covered by a crown?

    <p>1.5-2mm, all the way around (360° encirclement)</p> Signup and view all the answers

    What complications can arise from post loosening in crown preparation?

    <p>All of the above</p> Signup and view all the answers

    Which technique is used to remove the initial amount of Gutta Percha in prefabricated crown preparation?

    <p>Peeso and Gates Glidden reamers</p> Signup and view all the answers

    Which technique involves shaping the canal with a system drill and using a plastic dowel fit loosely in the canal?

    <p>Direct Cast Technique</p> Signup and view all the answers

    What is the standard cement that is extremely successful and tried & tested for crown cementation?

    <p>Zinc phosphate</p> Signup and view all the answers

    What should be corrected to prevent complications associated with root perforation during crown preparation?

    <p>All of the above</p> Signup and view all the answers

    What is the primary reason for creating a keyway during crown preparation?

    <p>To prevent rotation</p> Signup and view all the answers

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