Contraindications for Fixed Prosthodontics
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What is a contraindication for fixed prosthodontics?

  • The patient has a good health.
  • The patient is motivated to have the prosthesis placed.
  • The patient has poor oral hygiene habits. (correct)
  • The patient has a suitable abutment tooth.

    • What is the correct sequence of steps in casting/crown fabrication?

  • Impression, Model and Die Fabrication, Tooth Preparation
  • Impression, Temporization, Tooth Preparation
  • Tooth Preparation, Temporization, Impression (correct)
  • Tooth Preparation, Impression, Temporization

    • What type of crown is designed for therapeutic reasons?

  • Splint (correct)
  • Anatomic crown
  • Artificial crown
  • Clinical crown

    • What is a consequence of tooth loss without replacement?

    <p>Tilting of adjacent tooth or teeth</p> Signup and view all the answers

    What is a type of fixed partial denture?

    <p>Resin bonded bridge</p> Signup and view all the answers

    What is the classification of fixed prosthodontics based on surface coverage?

    <p>Full coverage and partial coverage</p> Signup and view all the answers

    What is an example of extra coronal restoration?

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

    What is a type of fixed prosthodontics?

    <p>Fixed partial denture</p> Signup and view all the answers

    What type of bridge extends from the anterior segment of the dental arch to the posterior segment, passing by the canine area?

    <p>Complex bridge</p> Signup and view all the answers

    Which type of bridge involves a retainer that consists of two parts, allowing some movement?

    <p>Fixed-movable bridge</p> Signup and view all the answers

    What is the primary difference between an anterior bridge and a posterior bridge?

    <p>The location in the dental arch</p> Signup and view all the answers

    Which type of bridge is a removable partial denture with an internal attachment?

    <p>Removable Bridge</p> Signup and view all the answers

    According to chronology, what is the final stage of restoration?

    <p>Definitive restoration</p> Signup and view all the answers

    What type of bridge is classified according to the length of span as 'more than two teeth missing'?

    <p>Long span</p> Signup and view all the answers

    Which type of material is classified as 'metallic with full coverage porcelain or acrylic'?

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

    What type of bridge is classified according to site as 'involving teeth on both sides of the midline'?

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

    What type of bridge can be removed by the patient for cleansing purposes?

    <p>Removable Bridge</p> Signup and view all the answers

    What is a Cantilever Bridge also known as?

    <p>Free End Bridge</p> Signup and view all the answers

    What type of bridge extends at one of its terminals beyond the canine?

    <p>Complex Bridge</p> Signup and view all the answers

    What is the purpose of a Temporary Bridge?

    <p>For protection of the prepared teeth and maintenance of the space</p> Signup and view all the answers

    What is a Primary Abutment?

    <p>An abutment adjacent to the edentulous space</p> Signup and view all the answers

    What is an Implant?

    <p>A device that is surgically placed into the jaw bones to replace a single tooth or teeth</p> Signup and view all the answers

    What is a Pontic?

    <p>An artificial tooth on a fixed partial denture that replaces the missing natural tooth</p> Signup and view all the answers

    What is a Pier Abutment?

    <p>An isolated abutment between two edentulous spaces</p> Signup and view all the answers

    What is the primary characteristic of a sanitary/hygienic pontic?

    <p>It is easy to clean as it does not touch the residual ridge</p> Signup and view all the answers

    What is the main difference between a ridge lap pontic and a modified ridge lap pontic?

    <p>The amount of contact with the ridge</p> Signup and view all the answers

    What type of pontic is also known as an egg-shaped pontic?

    <p>Conical pontic</p> Signup and view all the answers

    What is the purpose of the metal framework in a PFM?

    <p>To provide strength</p> Signup and view all the answers

    What is the main advantage of a modified sanitary pontic?

    <p>It provides more space for easier cleansing</p> Signup and view all the answers

    What is the primary characteristic of an ovate pontic?

    <p>It appears as if it is emerging from the ridge</p> Signup and view all the answers

    What does a three-quarter crown restore?

    <p>The occlusal surface and three of the four axial surfaces, excluding the facial surface</p> Signup and view all the answers

    Which type of crown restores all surfaces except the lingual surface?

    <p>Reverse three-quarter crown</p> Signup and view all the answers

    What additional surface does a seven-eight crown restore compared to a three-quarter crown?

    <p>The facial surface</p> Signup and view all the answers

    Which of the following is characteristic of a pinledge retainer?

    <p>It relies on long parallel pins in the lingual or palatal surfaces for retention</p> Signup and view all the answers

    What does a laminate veneer primarily restore?

    <p>The facial surface of a tooth for aesthetic purpose</p> Signup and view all the answers

    In what way are resin-bonded restorations characterized?

    <p>They are bonded to etched enamel by wings</p> Signup and view all the answers

    Which crown type is specifically designed to restore the occlusal and mesial surfaces only?

    <p>Half crown</p> Signup and view all the answers

    What characterizes an inlay retainer?

    <p>It is a classic intracoronal cast restoration</p> Signup and view all the answers

    Study Notes

    Contraindications for Fixed Prosthodontics

    • Diseased or missing supportive tissues hinder fixed prosthodontics.
    • Lack of suitable abutment teeth prevents successful procedures.
    • Poor patient health can impede treatment effectiveness.
    • Patient motivation is crucial; lack thereof can lead to treatment refusal.
    • Poor oral hygiene habits increase risks associated with prosthesis.
    • Financial constraints may restrict access to necessary treatment.

    Crown Types

    • Anatomic crown: The portion of the tooth covered by enamel.
    • Clinical crown: The visible part of the tooth above the gum line.
    • Artificial crown: Man-made restoration placed over a tooth.
    • Temporary crown: A provisional cover for a prepared tooth.

    Consequences of Tooth Loss

    • Super eruption: Opposing teeth may over-erupt due to missing teeth.
    • Adjacent teeth may tilt, affecting alignment.
    • Loss of proximal contact can lead to food impaction.
    • Bone loss may occur in edentulous areas.
    • Affects aesthetics, speech, and masticatory function.

    Classification of Fixed Prosthodontics

    • Single restoration: Typically refers to a crown.
    • Fixed partial denture (FPD): Bridges that replace one or more missing teeth.
    • Splint: Used for therapeutic purposes, connects teeth.
    • Additional options for tooth replacement include implants and removable partial dentures.

    Restoration Types

    • Fixed prosthodontics can be classified based on surface coverage:
      • Extra coronal restoration: Covers the entire tooth crown.
      • Intracoronal restoration: Located within the tooth structure (inlays and onlays).
    • Based on materials used for crowns:
      • Metal: Precious and non-precious alloys.
      • Non-metal: Porcelain or ceramic materials.
    • Based on retentions, including grooves and pins.

    Partial Coverage Restorations

    • Restore portions of the tooth's clinical crown.
    • Types based on retention include:
      • Three-quarter crown, reverse three-quarter crown, half crown.
      • Pinledge retainers.
      • Modified types incorporating both grooves and pins.

    Specific Crown Types

    • Three-quarter crowns cover occlusal and three axial surfaces, excluding the facial surface.
    • Reverse three-quarter crowns omit only the lingual surface.
    • Seven-eight crowns include facial surfaces as extensions of three-quarter crowns.
    • Proximal-half crowns restore mesial and occlusal surfaces partially.

    Inlays and Veneers

    • Inlay retainers serve a support role without covering cusps entirely.
    • Laminate veneers restore facial aesthetics, made of resin or porcelain.

    Bridges

    • Fixed-fixed bridge: Both ends cemented to abutment teeth.
    • Fixed-movable bridge: Allows movement at one end with a key-and-way mechanism.
    • Removable bridge: Can be removed for cleaning; uses precision attachments.
    • Cantilever bridge: Supported from one side only.
    • Temporary bridges protect prepared teeth until definitive restoration is completed.

    Pontics in Fixed Partial Dentures

    • Pontic: Artificial tooth replacing a missing tooth, restoring function and aesthetics.
    • Types classified by material: all metal, all ceramic, or combinations.
    • Classification based on ridge relation: mucosal contact or non-contact types.

    Pontic Designs with Mucosal Contact

    • Ridge lap pontic: Overlaps the buccal and lingual ridge surfaces.
    • Modified ridge lap pontic: Contacts only the labial ridge surface.
    • Ovate pontic: Subtle design that appears to rise from the ridge.
    • Conical pontic: Egg-shaped with a single point contact.
    • Sanitary/hygienic pontic: Designed for ease of cleaning; does not contact the ridge.

    Connectors in Fixed Partial Dentures

    • Connectors unite pontic and retainers.
    • Types include rigid connectors for stability and non-rigid connectors for flexibility.

    Porcelain Veneers & Fixed Partial Dentures

    • Porcelain fixed partial dentures feature a metal framework for strength, covered with baked porcelain for esthetics.

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    Description

    Determine the necessary conditions for fixed prosthodontics and contraindications for treatment. Learn about tooth preparation and crowns fabrication.

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