Principles of Cavity Preparation in Dentistry
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Questions and Answers

What is the primary objective of cavity preparation?

  • To improve esthetics of the tooth
  • To remove all defects and protect the pulp (correct)
  • To create space for dental implants
  • To reshape the tooth for better function

    • Which classification system is mentioned in the text for carious lesions?

  • ADA Classification
  • GV Black’s Classification (correct)
  • Universal Classification
  • ISO Classification

    • What is the purpose of the biological principles of cavity preparation?

  • To protect the pulp and prevent caries recurrence (correct)
  • To improve the esthetic appearance of the tooth
  • To increase the speed of the cavity preparation process
  • To enhance the strength of the tooth structure

    • What is the role of mechanical alteration in cavity preparation?

    <p>To receive a restorative material and restore proper form, function, and esthetics</p> Signup and view all the answers

    In cavity preparation, what should be done with defective and friable tooth structure?

    <p>It should all be removed</p> Signup and view all the answers

    What are the objectives of cavity preparation according to the text?

    <p>To locate the margins of restorations conservatively</p> Signup and view all the answers

    Which principle of cavity preparation is concerned with the health and integrity of the remaining tooth tissues?

    <p>Biological Principles</p> Signup and view all the answers

    What is one of the forms of biological principles mentioned in the text?

    <p>Pulp protection</p> Signup and view all the answers

    According to the text, what do the biological principles in cavity preparation aim to minimize?

    <p>Irritation to vital tooth structures</p> Signup and view all the answers

    What does GV Black’s Classification primarily consider?

    <p>Mechanical factors</p> Signup and view all the answers

    What does cavity preparation involve according to the text?

    <p>Removal of all defective and friable tooth structure</p> Signup and view all the answers

    In cavity preparation, what is the purpose of forming the cavity so that under masticatory forces, the tooth and restoration will not fracture?

    <p>To prevent fracture under chewing forces</p> Signup and view all the answers

    Which factor dictates the outline form of the cavity preparation?

    <p>Position of pits &amp; fissures</p> Signup and view all the answers

    Why should unsupported enamel be removed during cavity preparation?

    <p>To minimize the chance of secondary decay</p> Signup and view all the answers

    What is the process of reshaping the enamel surface with rotary instruments to make it cleanable and finishable called?

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

    Which of the following should be less than 1.5 mm in the bucco-lingual direction when extending a cavity to eliminate defective and susceptible tissues?

    <p>Diameter of bur</p> Signup and view all the answers

    Why should healthy tooth structure NOT be removed during cavity preparation?

    <p>Because it cannot be put back once removed</p> Signup and view all the answers

    What should be included in a Class II preparation if the marginal ridge is unsupported or very thin (less than 1.6mm)?

    <p>Marginal ridge</p> Signup and view all the answers

    What determines the position and configuration of the cavosurface margin in cavity preparations?

    <p>The material utilized to restore teeth</p> Signup and view all the answers

    What is the recommended width for the optimal isthmus?

    <p>¼ intercuspal distance</p> Signup and view all the answers

    What is the primary reason for placing a bevel and etching the enamel at the cavosurface angle in composite resin preparations?

    <p>To maximize edge strength for both the restorative material and the enamel</p> Signup and view all the answers

    What should be parallel to the contour of the marginal ridge in a Class II preparation?

    <p>Mesial and distal walls</p> Signup and view all the answers

    What does enameloplasty involve?

    <p>Reshaping the enamel surface with rotary instruments</p> Signup and view all the answers

    What causes unsupported enamel that may fracture if subjected to occlusal load?

    <p>Converged walls</p> Signup and view all the answers

    What must be incorporated into each cavity preparation based on the individual properties of each restorative material utilized?

    <p>Design factors that demand certain position and configuration of cavosurface margin</p> Signup and view all the answers

    What is extended just sufficient to eliminate the defective and susceptible tissues in a cavity?

    <p>Bucco-lingual extension</p> Signup and view all the answers

    What is the principle known as 'extension for prevention' applied to in cavity preparations?

    <p>Including areas with caries susceptibility in the outline form</p> Signup and view all the answers

    What is recommended if the marginal ridge is unsupported or very thin in a Class II preparation?

    <p>Diameter of bur</p> Signup and view all the answers

    What should be conserved to insulate and strengthen the restored tooth in posterior teeth?

    <p>The dentin surrounding the pulpal horns</p> Signup and view all the answers

    What is recommended for preserving the strength and function of the cusps while eliminating susceptible grooves or defective tooth structure in a cavity?

    <p>Isthmus just wide enough to accept instrumentation</p> Signup and view all the answers

    What is an exception made for during cavity preparation with regards to unsupported enamel?

    <p>Retaining unsupported enamel for conservative placement with composite resins</p> Signup and view all the answers

    What should be parallel to the respective tooth surface in a cavity to eliminate defective and susceptible tissues?

    <p>Bucco-lingual extension</p> Signup and view all the answers

    What should be designed to ensure that all margins are in areas easily cleansed by the patient?

    <p>Outline form</p> Signup and view all the answers

    What causes unsupported enamel, which may fracture if subjected to occlusal load due to little amount of dentin supported enamel?

    <p>Converged walls</p> Signup and view all the answers

    What is the recommended width for the optimal isthmus?

    <p>¼ intercuspal distance</p> Signup and view all the answers

    What should be included in a Class II preparation if the marginal ridge is unsupported or very thin (less than 1.6mm)?

    <p>Marginal ridge</p> Signup and view all the answers

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