Dental Impressions and Trays Quiz
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Questions and Answers

What is the primary purpose of a preliminary impression?

  • To create a special tray.
  • To capture fine details of the arch.
  • To record dimensions of the arch. (correct)
  • To construct the final denture base.
  • Which type of tray is used for secondary impressions?

  • Special tray. (correct)
  • Stock tray.
  • Custom tray.
  • Plastic tray.
  • What is the usage of a preliminary impression?

  • Pouring of master cast.
  • Pouring of primary cast and construction of special tray. (correct)
  • Recording fine details of the denture.
  • Completion of the denture.
  • What type of impression is used to record the fine details of the arch?

    <p>Secondary impression.</p> Signup and view all the answers

    Which of the following statements is true about preliminary and secondary impressions?

    <p>Preliminary impressions are made before secondary impressions.</p> Signup and view all the answers

    What are the two types of trays mentioned?

    <p>Stock trays and special trays</p> Signup and view all the answers

    Which technique is NOT listed for taking final impressions?

    <p>Consistency impression technique</p> Signup and view all the answers

    What is the likely purpose of stock and special trays in dentistry?

    <p>To take impressions of teeth</p> Signup and view all the answers

    Which impression technique applies pressure to capture the shape of the mouth?

    <p>Selective pressure impression technique</p> Signup and view all the answers

    What characteristic do the trays share as observed in their design?

    <p>They are flexible and empty</p> Signup and view all the answers

    What are the two main parts of a dental tray?

    <p>Body and handle</p> Signup and view all the answers

    What are the components of the tray's body?

    <p>Floor and flanges</p> Signup and view all the answers

    What is the purpose of the handle on a dental tray?

    <p>To allow for easier grip</p> Signup and view all the answers

    Which of the following describes the body of a dental tray?

    <p>A flat, mesh-like structure</p> Signup and view all the answers

    Which feature is NOT a part of the dental tray's body?

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

    What is another name for the muco-static impression technique?

    <p>Minimal pressure impression technique</p> Signup and view all the answers

    Which impression technique is registered when tissues are at function?

    <p>Muco-compressive impression technique</p> Signup and view all the answers

    In which impression technique are the pressures applied selectively?

    <p>Selective pressure impression technique</p> Signup and view all the answers

    What is a characteristic of the impression trays depicted in the diagram?

    <p>They feature rounded edges and a cap-like form.</p> Signup and view all the answers

    Which technique is specifically known for using minimal pressure during impression registration?

    <p>Muco-static impression technique</p> Signup and view all the answers

    What materials are commonly used to make stock trays?

    <p>Metal and plastic</p> Signup and view all the answers

    What is the necessary depth of impression material for a stock tray's basal seat area?

    <p>6mm</p> Signup and view all the answers

    What types of stock trays are available?

    <p>Perforated and non-perforated</p> Signup and view all the answers

    What should stock trays conform to?

    <p>The shape and contour of the residual ridge</p> Signup and view all the answers

    Which statement about stock trays is incorrect?

    <p>They are only made from metal.</p> Signup and view all the answers

    What is one characteristic of stock trays?

    <p>They come in various shapes and sizes.</p> Signup and view all the answers

    Which type of tray is typically available for general use without customization?

    <p>Stock trays</p> Signup and view all the answers

    What differentiates special trays from stock trays?

    <p>Special trays are custom-fitted for specific patients.</p> Signup and view all the answers

    Which of the following is NOT a feature of stock trays?

    <p>Availability in limited shapes and sizes.</p> Signup and view all the answers

    What is the primary purpose of using impression trays?

    <p>To take accurate dental impressions.</p> Signup and view all the answers

    Which of the following is NOT a possible material for making special trays?

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

    Which material is used for making trays that can cure under light?

    <p>Light-curing acrylic resin</p> Signup and view all the answers

    Which of these statements about special trays is false?

    <p>They are exclusively made from metal.</p> Signup and view all the answers

    What type of cast can be used for making special trays?

    <p>Diagnostic cast</p> Signup and view all the answers

    Which tray material is known for its self-curing properties?

    <p>Self-curing acrylic resin</p> Signup and view all the answers

    What is one advantage of special trays compared to stock trays?

    <p>They fit more accurately to the individual arches.</p> Signup and view all the answers

    How does the use of special trays impact the amount of impression material needed?

    <p>It reduces the amount of impression material needed.</p> Signup and view all the answers

    What economic advantage do special trays provide?

    <p>They result in less impression material usage.</p> Signup and view all the answers

    What is a comfort-related advantage of special trays for patients?

    <p>They are more comfortable compared to stock trays.</p> Signup and view all the answers

    What dimensional advantage do special trays offer during impressions?

    <p>Less dimensional change is expected.</p> Signup and view all the answers

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