Endodontics Core Materials Quiz
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Questions and Answers

What indicates that extraction may be the best treatment choice?

  • The root filling material cannot be removed
  • The post remains very short
  • The post is too long
  • The tooth’s prognosis is poor (correct)

    • Which method uses heat to assist in the removal of root filling material?

  • Chemical dissolution
  • Thermal removal (correct)
  • Ultrasonic techniques
  • Mechanical removal

    • What must be chosen before canal enlargement?

  • Type of filling material
  • Type of post system (correct)
  • Type of irrigation solution
  • Type of anesthesia

    • What is a significant advantage of self-adhesive resin cements over conventional resin-based luting cements?

    <p>No need for a bonding agent</p> Signup and view all the answers

    In custom made post construction, which technique is primarily used?

    <p>Indirect technique</p> Signup and view all the answers

    What should be done to the coronal tooth structure before post space preparation?

    <p>Ignore any missing tooth structure</p> Signup and view all the answers

    Which is a method to remove root filling material?

    <p>Both thermal and mechanical methods</p> Signup and view all the answers

    What is the primary goal during the preparation of the coronal tooth structure?

    <p>To ensure proper access for the post</p> Signup and view all the answers

    What property of core materials helps them withstand intraoral forces?

    <p>High compressive strength</p> Signup and view all the answers

    Which core build-up material is known for excellent esthetics?

    <p>Composite resins</p> Signup and view all the answers

    What is a disadvantage of using composite resins as a core material?

    <p>Interference from eugenol during polymerization</p> Signup and view all the answers

    What aspect of glass ionomer materials limits their use in extensive tooth structure loss?

    <p>Solubility and moisture sensitivity</p> Signup and view all the answers

    Why might amalgam require additional retention features like pins?

    <p>Due to non-adhesive properties</p> Signup and view all the answers

    Which property is NOT a requirement for ideal core materials?

    <p>High tensile strength</p> Signup and view all the answers

    What is a noted advantage of amalgam cores?

    <p>Good physical and mechanical properties</p> Signup and view all the answers

    What is an optimal condition for using resin-modified glass ionomer materials?

    <p>With adequate retention features</p> Signup and view all the answers

    What is the minimum height requirement for a ferrule?

    <p>1.5 – 2 mm</p> Signup and view all the answers

    What should the ferrule NOT encircle during preparation?

    <p>The core</p> Signup and view all the answers

    Which of the following is a key benefit of the ferrule effect?

    <p>Improves stability and resistance to rotation</p> Signup and view all the answers

    Which of the following is NOT one of the six important features for post design?

    <p>Rotational flexibility</p> Signup and view all the answers

    What is the recommended minimum apical gutta-percha length that should remain?

    <p>5 mm</p> Signup and view all the answers

    Which factor is essential in post selection for a successful core system?

    <p>Compatible bonding capability</p> Signup and view all the answers

    Which property is NOT ideal for a post material?

    <p>Minimum retention of the core</p> Signup and view all the answers

    What should one calculate before removing gutta-percha from a root canal?

    <p>Post length</p> Signup and view all the answers

    Which condition is NOT an indication for the restoration of an endodontically treated tooth?

    <p>Healthy tooth structure with no damage</p> Signup and view all the answers

    What factor is important for ensuring the retention of core material in non-retentive abutments?

    <p>Presence of a ferrule</p> Signup and view all the answers

    What is the purpose of creating a small groove in the canal wall of an extensively damaged tooth?

    <p>To serve as an antirotational element</p> Signup and view all the answers

    Which of the following is NOT a principle of tooth preparation for post and core systems?

    <p>Increased size of the root canal</p> Signup and view all the answers

    What defines the ferrule effect in the context of crown preparation?

    <p>A vertical band of tooth structure at the gingival aspect</p> Signup and view all the answers

    Which characteristic is essential for a root of an endodontically treated tooth to be considered biologically sound?

    <p>Absence of resorption or fractures</p> Signup and view all the answers

    Which type of resistance is primarily concerned with preventing rotational movement in a post and core restoration?

    <p>Rotational resistance</p> Signup and view all the answers

    What is a significant requirement for root canal filling to enhance the restoration of an endodontically treated tooth?

    <p>Perfect apical and lateral seal</p> Signup and view all the answers

    What is a primary benefit of using Glass Ionomer Cement (GIC) after an MOD restoration?

    <p>It can effectively block out after restoration removal.</p> Signup and view all the answers

    Which statement accurately describes an endocrown?

    <p>It retains enamel to enhance adhesion.</p> Signup and view all the answers

    What distinguishes Cast Core restorations from other types?

    <p>They prevent dislodgement of the crown from the post.</p> Signup and view all the answers

    What is a key principle of the Morphology Driven Preparation Technique?

    <p>Achieve depth cuts for tissue reduction.</p> Signup and view all the answers

    Why might the Cast Core procedure be considered disadvantageous?

    <p>It can involve the loss of healthy tooth structure.</p> Signup and view all the answers

    What is the purpose of the silicone index in Morphology Driven Preparation Technique?

    <p>To control the thickness during tissue reduction.</p> Signup and view all the answers

    What is a characteristic of the preparation sequence in Morphology Driven Preparation Technique?

    <p>It involves anatomical reduction of the occlusal surface.</p> Signup and view all the answers

    In which situation might an endocrown be considered as an alternative solution?

    <p>For molars needing post-retained restorations.</p> Signup and view all the answers

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    Study Notes

    Restoration of Endodontically Treated Teeth

    • Indications for Post Placement:
      • Retention of core material in non-retentive abutments
      • Severely damaged teeth, losing over 50% of tooth structure
      • Extensive proximal caries with unsupported facial walls, where other restoration methods fail.
      • Bilateral proximal decay with pulp exposure
      • Fractured teeth with exposed pulps
      • Extensive coronal destruction of endodontically treated teeth
      • Retainers for short span bridges, when abutments are endodontically treated
      • Biologically sound roots with no resorption or fractures
      • Sufficient length, thickness, and strength of the root
      • Properly filled root canals with ideal apical and lateral seals
      • Healthy periodontal and alveolar support structures without periapical pathosis

    Principles of Tooth Preparation for Post and Core Systems

    • Goal: Preservation of tooth structure, retention, and resistance
    • Rotational Resistance: Maintaining sufficient coronal structure to prevent post rotation using the vertical coronal wall. When coronal dentin is lost, a groove at the cervical bulkiest lingual aspect can prevent rotation.
    • Ferrule Effect:
      • A ferrule is a vertical band of tooth structure at the gingival aspect of a crown preparation.
      • It should be at least 1.5-2 mm high, have parallel axial walls, completely encircle the tooth, and not invade the attachment apparatus.
      • Obtaining a ferrule is crucial for long-term success; load distribution; and improves stability and rotation resistance.
      • Surgical crown lengthening or forced eruption may be necessary if a ferrule cannot be achieved.

    Important Features for a Successful Design

    • Adequate apical seal: Crucial for successful restoration
    • Minimal canal enlargement: Maintaining tooth structure
    • Adequate post length: Important for resistance and retention
    • Positive horizontal stop: Minimizes wedging
    • Vertical walls: Prevents rotation
    • Margin extension: Extending restoration onto sound tooth structure

    Methodology

    • Post Selection: Proper selection of the post considering root length, tooth anatomy, post width, canal configuration, coronal tooth structure, torquing force & stress, development of hydrostatic pressure
    • Removal of Endodontic Filling: Gutta-percha removal with appropriate techniques (thermal, mechanical) and consideration of apical fill
    • Canal Enlargement: Choosing the correct post system before enlarging the canal. Prefabricated posts are available in kits that include rotary instruments that match the posts for space preparation.
    • Post Cementation: Using dual cure self-adhesive resin cements as better alternatives to conventional resin-based luting cements.
    • Core Fabrication: Creating a core and its building materials.
    • Temporization: Temporary protection and stabilization
    • Try-in and cementation: Final fit and securing of the restoration

    Ideal Physical Properties of Post Materials

    • Maximum protection of the root
    • Adequate retention within the root
    • Biocompatible and noncorrosive
    • Maximum retention of the core and crown
    • Maximum protection of the crown margin cement seal
    • Pleasing esthetics
    • Radiopaque

    Core Build Up

    • Material Requirements: This step involves selecting the suitable core material for the specific case, considering high compressive strength, biocompatibility, bonding to tooth structure and post, similar thermal expansion to dentin, dimensional stability, and compatibility with esthetics.
    • Material Categories: Different types of core materials (custom made, metal ceramics, composite, amalgam, glass ionomer, cast core) are discussed.
    • Specific Core Materials:
      • Composite resins, advantages & disadvantages
      • Amalgam core, advantages & disadvantages
      • Glass ionomer cements, advantages & disadvantages
      • Cast core

    Morphology Driven Preparation Technique

    • Principles intended to improve esthetics, prevent tooth tissue loss by decreasing dentin exposure, guide tissue reduction of the occlusal surface, prepare margins, ensure smooth insertion, and improve transitions.
    • Chronological sequence for preparation.
    • Variations in margin definitions based on tooth type, sound tissue, position, morphology and cusp.
    • Preparation ultimately guided by the anatomical and structural form of the teeth
    • Maxillary bicuspid to molars, and mandibular molars and premolars preparation procedures. Specific dimensional details are given for each

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    Related Documents

    Restoration Of Endodontically Treated Tooth PDF

    Description

    Test your knowledge on endodontic treatments and core materials with this quiz. Explore topics such as extraction indications, heat-assisted removal methods, and properties of core materials. Perfect for dental students and professionals looking to refresh their understanding of root canal procedures.

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