Advantages of Conservative Tooth Preparation
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Questions and Answers

What is the limitation of the preparation?

  • Cementum only
  • Dentin only
  • Enamel only (correct)
  • Enamel and dentin

    • Which surface remains intact during the preparation?

  • Occlusal surface
  • Labial surface (correct)
  • Palatal surface
  • Lingual surface

    • What is one of the advantages of this preparation?

  • Conservative (correct)
  • Unesthetic
  • Invasive
  • Painful

    • Why is anesthesia not needed in this preparation?

    <p>Because it is within enamel</p> Signup and view all the answers

    What is another advantage of this preparation?

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

    What is the primary focus of fixed prosthodontics?

    <p>Restoring natural teeth</p> Signup and view all the answers

    What is the bonding process in dentistry related to?

    <p>Restorative and adhesive dentistry</p> Signup and view all the answers

    How many types of materials are used for RBB?

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

    What is one of the materials used for RBB?

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

    Which of the following is NOT a material used for RBB?

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

    What is the main component of adhesive resin cements?

    <p>4-META</p> Signup and view all the answers

    What is the purpose of heating the alloy in precious alloys?

    <p>To promote the bond between 4-Meta and copper rich deposit</p> Signup and view all the answers

    What is the name of the adhesive resin cement containing 4-META?

    <p>C &amp; B Metabond</p> Signup and view all the answers

    What is the result of heating precious alloys?

    <p>Formation of a copper rich deposit</p> Signup and view all the answers

    What is the brand of the adhesive resin cement containing 4-META?

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

    What was the problem with initial all-ceramic, two-retainer RBFPDs?

    <p>High incidence of unilateral framework failure</p> Signup and view all the answers

    What happened to the pontic when unilateral framework failure occurred?

    <p>It bonded to a single retainer in a cantilevered fashion</p> Signup and view all the answers

    What type of ceramic was used to make the all-ceramic RBFPDs?

    <p>Glass infiltrated alumina ceramic</p> Signup and view all the answers

    What happened to the all-ceramic RBFPDs made from In-Ceram within the first years of clinical service?

    <p>They showed a high fracture rate</p> Signup and view all the answers

    What was the design of the all-ceramic RBFPDs that showed a high fracture rate?

    <p>Two-retainer design</p> Signup and view all the answers

    What is one type of structural damage that can occur in a dental restoration?

    <p>Shade match deterioration</p> Signup and view all the answers

    What can cause shade match deterioration in a dental restoration?

    <p>Natural tooth discoloration</p> Signup and view all the answers

    What is another possible cause of shade match deterioration?

    <p>Porcelain changes</p> Signup and view all the answers

    What type of dental restoration is referred to as a 'Cantilever'?

    <p>Single retained bridge</p> Signup and view all the answers

    Study Notes

    Preparation and Advantages

    • Preparation is limited to enamel and the labial surface remains intact
    • Advantages include:
      • Conservative (within enamel)
      • No need for anesthesia
      • Esthetic
      • Fixed prosthodontics
      • Bonding

    Materials for RBB

    • Three different materials can be used:
      • Metal
      • Ceramic
      • Fiber-reinforced

    Adhesive Resin Cements

    • Contain 4-META, such as C & B Metabond (Parkell)
    • Heating the alloy (precious Alloys) promotes the bond between 4-Meta (resin cement) and copper-rich deposit formed by heating precious alloys

    Potential Complications

    • Structural damage
    • Shade match deterioration, which can result from:
      • Natural tooth discoloration
      • Porcelain changes

    Design and Retention

    • Single retained “Cantilever” or two retained RBB designs are possible
    • Two-retainer all-ceramic RBBPDs demonstrated a high incidence of unilateral framework failure, leading to a cantilevered design
    • All-ceramic RBFPDs made from glass-infiltrated alumina ceramic In-Ceram have a high fracture rate within the first years of clinical service, particularly with two-retainer designs

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    Description

    This quiz discusses the benefits of a tooth preparation method that only involves the enamel, preserving the labial surface intact.

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