Cavity Classification and Preparation Quiz
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Questions and Answers

What is Class I cavity?

  • Developmental cavities in pit and fissures of teeth located in occlusal surfaces of posterior teeth (correct)
  • Cervical third of the facial or lingual surface of the tooth
  • Proximal surfaces on the posterior teeth
  • Interproximal surface of anterior teeth

    • What is Class II cavity?

  • Cavity involving three or more surfaces of the tooth
  • Interproximal surface of anterior teeth
  • Proximal surfaces on the posterior teeth (correct)
  • Cervical third of the facial or lingual surface of the tooth

    • What does Class III cavity involve?

  • Buccal or lingual pits on the molars
  • Cervical third of the facial surface
  • Occlusal surfaces of the posterior teeth
  • Interproximal surface of anterior teeth (correct)

    • What distinguishes Class IV cavity?

    <p>Interproximal surface of anterior teeth and includes the incisal edge</p> Signup and view all the answers

    What area does Class V cavity affect?

    <p>The cervical third of the facial or lingual surface of the tooth</p> Signup and view all the answers

    What does Class VI cavity refer to?

    <p>Not part of the original standard classification, involves incisal or occlusal surface worn away from abrasion</p> Signup and view all the answers

    What defines a simple cavity?

    <p>Involves one surface of the tooth</p> Signup and view all the answers

    What defines a compound cavity?

    <p>Involves two surfaces of the tooth</p> Signup and view all the answers

    What defines a complex cavity?

    <p>Involves three or more surfaces of the tooth</p> Signup and view all the answers

    List the elements of cavity preparations.

    <p>Outline form, resistance form, retention form, convenience form, finishing or refinement, cleansing or debridement</p> Signup and view all the answers

    What does the preparation of the tooth form?

    <p>Walls, lines, and angles</p> Signup and view all the answers

    What is a wall in cavity preparation?

    <p>The side or floor of the cavity preparation</p> Signup and view all the answers

    What are the types of walls in a cavity prep?

    <p>Buccal, lingual, gingival, pulpal, axial</p> Signup and view all the answers

    What defines a cavity wall?

    <p>Side or surface of tooth prepared for restoration</p> Signup and view all the answers

    What is an internal wall?

    <p>Cavity wall that does not extend to the external tooth surfaces</p> Signup and view all the answers

    What is the external wall?

    <p>Portion of the tooth preparation that extends to the external tooth surface</p> Signup and view all the answers

    What is the axial wall?

    <p>Internal wall of prepared tooth that runs along the long axis of the tooth</p> Signup and view all the answers

    What is the pulpal wall?

    <p>Internal wall of prepared tooth that is perpendicular to the long axis of the tooth</p> Signup and view all the answers

    What are line angles?

    <p>Junction of 2 walls in a cavity prep</p> Signup and view all the answers

    What are point angles?

    <p>Corners of the cavity preparation, junction of 3 walls in a cavity prep</p> Signup and view all the answers

    What is the cavosurface margin?

    <p>Angle formed by the junction of the wall of the preparation and the untouched surface of the tooth</p> Signup and view all the answers

    What is the outline form?

    <p>Designates the overall shape of the cavity preparation</p> Signup and view all the answers

    What is resistance form?

    <p>Internal shape of the cavity that protects the tooth and the restoration from the stresses of mastication</p> Signup and view all the answers

    What is retention form?

    <p>Internal shape of the cavity preparation that retains the restoration</p> Signup and view all the answers

    What is convenience form?

    <p>Also considered the access form, alteration necessary for instrumentation during the preparation</p> Signup and view all the answers

    What is the removal of carious dentin?

    <p>Cutting of tooth structure and dentin to remove caries</p> Signup and view all the answers

    What is the finishing or refinement of the cavity preparation?

    <p>Final planing of the cavity walls before the placement of the restoration</p> Signup and view all the answers

    What is cleansing or debridement?

    <p>Spraying and rinsing of the cavity preparation to remove debris</p> Signup and view all the answers

    Study Notes

    Cavity Classification

    • Class I: Developmental cavities found in pits and fissures on occlusal surfaces of posterior teeth, molars' buccal or lingual pits, and lingual pits of maxillary incisors.
    • Class II: Cavities located on the proximal surfaces of posterior teeth.
    • Class III: Cavities affecting interproximal surfaces of anterior teeth.
    • Class IV: Similar to Class III but also involves the incisal edge of anterior teeth.
    • Class V: Cavities on the cervical third of facial or lingual surfaces, often due to sweet consumption.
    • Class VI: Not part of original classifications; identifies cavities on incisal or occlusal surfaces due to abrasion.

    Cavity Types

    • Simple Cavity: Involves one tooth surface.
    • Compound Cavity: Involves two surfaces of a tooth.
    • Complex Cavity: Involves three or more surfaces of a tooth.

    Elements of Cavity Preparations

    • Include outline form, resistance form, retention form, convenience form, finishing/refinement, and cleansing/debridement.
    • All elements are essential during cavity prep.

    Tooth Preparation Forms

    • Builds walls, lines, and angles in the cavity.

    Walls of Cavity Preparation

    • Defined as sides or floors of the cavity, named after adjacent tooth surfaces:
      • Axial Wall: Runs parallel to the tooth's long axis.
      • Pulpal Wall: Also known as the pulpal floor, is perpendicular to the long axis.
      • Gingival Wall: Nearest to the gingiva, perpendicular to the long axis.
    • Internal Wall: Does not extend to external tooth surfaces.
    • External Wall: Extends to the tooth's external surface, named by the surface it involves.

    Cavity Structure

    • Line Angles: Junctions of two walls in cavity prep.
    • Point Angles: "Corners" formed by the junction of three walls.
    • Cavosurface Margin: Angle formed where cavity walls meet unprepared tooth surface; critical for preventing leakage.

    Cavity Preparation Forms

    • Outline Form: Overall shape determined by decay extent and restorative material, stays within cavosurface margin.
    • Resistance Form: Internal shape protects from masticatory stresses; involves shape and placement of walls.
    • Retention Form: Shape that retains restoration; often includes undercutting walls for mechanical locking in amalgam preparations.
    • Convenience Form: Access form necessary for instrumentation and restoration placement, often expanding beyond outline form.

    Removal of Carious Dentin

    • Involves cutting tooth structure using instruments like enamel hatchets, chisels, and spoon excavators.

    Final Cavity Preparation Steps

    • Finishing/Refinement: Final planning of cavity walls before restoration.
    • Cleansing/Debridement: Removal of debris through spraying and rinsing, typically using high-volume evacuation and air/water syringes.

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    Description

    Test your knowledge on cavity classifications, including Class I through VI, and the characteristics of simple, compound, and complex cavities. Additionally, explore the elements involved in cavity preparations. Perfect for dental students and practitioners alike!

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