Impression Tray Fabrication Techniques
25 Questions
0 Views

Impression Tray Fabrication Techniques

Created by
@BrainiestPyramidsOfGiza

Podcast Beta

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main purpose of leaving wax slightly extended in the posterior palate and retromolar pad areas during tray fabrication?

  • To ensure the wax adheres better to the dental cast
  • To enable recording of the posterior palatal area and retromolar pad (correct)
  • To make the tray easier to remove from the dental cast
  • To reduce the overall material needed for fabrication

    • Which of the following statements is true about wax placement according to Boucher's recommendation?

  • The wax should cover all areas of the dental cast evenly
  • Only the posterior palatal area does not require wax
  • A 2 mm layer of base plate wax is recommended on the dental cast
  • A 1 mm layer of base plate wax is recommended, except for the PPS area (correct)

    • In the context of dental tray fabrication, what does PPS stand for?

  • Palpation Positioning Surface
  • Posterior Plate Section
  • Palatal Positioning Seal
  • Posterior Palatal Seal (correct)

    • What is the significance of trimming the wax to the outline during dental tray fabrication?

    <p>To achieve a precise shape that fits anatomical structures</p> Signup and view all the answers

    Which area is explicitly mentioned as not requiring wax application during the fabrication of a dental tray?

    <p>PPS area</p> Signup and view all the answers

    What is the primary function of impression trays during the setting and removal process?

    <p>To prevent distortion of the material</p> Signup and view all the answers

    Which step is NOT involved in the creation of a custom tray?

    <p>Add a plaster layer to the cast</p> Signup and view all the answers

    Which of the following materials is NOT typically used for making a special tray?

    <p>Silicone rubber</p> Signup and view all the answers

    What step comes immediately after placing the wax spacer on the cast during custom tray fabrication?

    <p>Place the Triad on the cast</p> Signup and view all the answers

    In which type of curing is the material hardened by chemical reactions among components?

    <p>Cold cure acrylic resin</p> Signup and view all the answers

    What is the primary purpose of trimming the wax after application to the maxillary cast?

    <p>To fit the wax layer to the specific contours of the cast.</p> Signup and view all the answers

    During the wax spacer application, what is the correct temperature method for softening the wax?

    <p>Heating it evenly over a Bunsen burner.</p> Signup and view all the answers

    What specific adjustment is made to the thickness of baseplate wax during the trimming process?

    <p>Cut back the thickness by 2 mm from the depth of the vestibule.</p> Signup and view all the answers

    What is the necessary action taken after the wax is firmly applied to the maxillary cast?

    <p>Trim the wax to adhere to the cast outline.</p> Signup and view all the answers

    What is the recommended quantity of wax layers to apply during the initial step?

    <p>A single layer for a clean application.</p> Signup and view all the answers

    What is the primary purpose of an impression in dentistry?

    <p>To obtain a negative reproduction of dental structures</p> Signup and view all the answers

    Which of the following is NOT a step in complete denture construction?

    <p>Orthodontic treatment planning</p> Signup and view all the answers

    What role do impression materials play in dentistry?

    <p>To obtain a cast of dental structures</p> Signup and view all the answers

    At which stage in complete denture construction is the maxillo-mandibular relationship established?

    <p>Try-in stage</p> Signup and view all the answers

    Which of the following best describes the secondary impression?

    <p>A more accurate impression to refine the shape</p> Signup and view all the answers

    What is the first area where the Triad material should be pressed when creating a tray?

    <p>Lingual area</p> Signup and view all the answers

    What angle should the tray handle be molded relative to the crest of the ridge?

    <p>45°</p> Signup and view all the answers

    How long should the tray be cured in the curing unit after being removed from the cast?

    <p>2 minutes</p> Signup and view all the answers

    Where should the handle of the tray begin when molded?

    <p>At the crest of the ridge on the anterior portion</p> Signup and view all the answers

    Which side of the tray should face up during the second curing phase in the curing unit?

    <p>Waxed side up</p> Signup and view all the answers

    Study Notes

    Impression Tray Fabrication

    • Impression trays are used to prevent distortion of the material while setting and being removed from the mouth.
    • Custom trays are made by outlining the cast, blocking out undercuts, placing a wax spacer, and then molding Triad material.
    • The Triad tray is then cured in an oven and trimmed for final use.
    • Cold cure, Visible light cure (VLC), and Heat cure acrylic are the most common materials for custom trays.

    Wax Spacer Placement

    • Boucher recommends placing a 1 mm layer of baseplate wax on the dental cast, excluding the posterior palatal seal (PPS) area.
    • When trimming the wax, leave it slightly extended in the retromolar pad and posterior palate.

    Triad Tray Procedure

    • A single layer of Triad tray material is placed on the wax cast, pressing into the lingual (mandibular) or palatal (maxillary) area first to prevent air pockets.
    • The material is then firmly pressed over the ridge and buccal areas.
    • A handle is molded onto the tray, starting at the crest of the ridge on the anterior portion and angled at 45 degrees, long enough to accommodate the thumb.
    • The tray is cured on the cast for 3 minutes and then placed waxed side up in the curing unit for 2 minutes.

    Complete Denture Construction Steps

    • History and examination
    • Primary impression
    • Secondary impression
    • Maxillo-mandibular relationship
    • Try-in stage
    • Denture insertion
    • Recall visits

    Impression

    • An impression is a negative reproduction of dental structures.
    • Impression materials are used to obtain an impression of teeth and/or the surrounding oral tissues.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz covers the methods and materials used for fabricating impression trays in dentistry. Topics include the fabrication process, wax spacer placement, and the use of Triad material. Test your knowledge on custom tray techniques and impressions!

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser