Root Canal Treatment and Nonvital Bleaching
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Questions and Answers

What is the primary reason for sealing the root-canal filling material with a base material?

  • To prevent the bleaching agent from affecting the tooth structure
  • To enhance the esthetic appearance of the tooth
  • To improve the marginal seal of the restoration
  • To prevent the bleaching agent from penetrating into the periodontal space or root canal (correct)

    • What is the primary cause of tooth discoloration?

  • Hydrogen sulfate formation
  • Hemolysis of erythrocytes in the dentin tubules (correct)
  • Radiologically detectable periapical radiolucency
  • Oxidative reactions of bleaching agents

    • Which of the following is NOT a common cause of tooth discoloration in non-vital teeth?

  • Root canal therapy
  • Tooth decay (correct)
  • Pulp tissue damage
  • Blood byproducts

    • What is a crucial requirement for internal tooth bleaching?

    <p>A sealed root-canal filling</p> Signup and view all the answers

    What is the primary reason why non-vital teeth may undergo internal staining after root canal treatment?

    <p>The pulp chamber and root canal system are sealed off from the bloodstream</p> Signup and view all the answers

    What is the primary indication for non-vital bleaching?

    <p>Discolored non-vital teeth</p> Signup and view all the answers

    Which of the following is a key factor in the effectiveness of non-vital bleaching?

    <p>Precise removal of all restorative materials from the access cavity</p> Signup and view all the answers

    Which of the following bleaching agents is NOT commonly used in internal tooth bleaching?

    <p>Sodium hypochlorite</p> Signup and view all the answers

    What should be replaced prior to bleaching, according to the text?

    <p>Insufficient coronal restorations</p> Signup and view all the answers

    What is the name of the internal tooth bleaching technique first described by Spasser in 1961?

    <p>Walking-bleach technique</p> Signup and view all the answers

    What is the purpose of internal bleaching in non-vital teeth?

    <p>To improve the esthetic appearance of the tooth</p> Signup and view all the answers

    What is a contraindication for internal bleaching?

    <p>The presence of a fiber post in the root canal</p> Signup and view all the answers

    What is the purpose of a waiting period in cases of radiologically detectable periapical radiolucency?

    <p>To monitor the progression of the lesion</p> Signup and view all the answers

    What is a consequence of pulp necrosis in teeth?

    <p>Tooth discoloration</p> Signup and view all the answers

    What is the primary reason why non-vital bleaching is most effective on teeth with stable restorations?

    <p>The restorations do not respond to bleaching agents</p> Signup and view all the answers

    Why is patient compliance crucial in non-vital bleaching?

    <p>To maintain good oral hygiene practices during and after treatment</p> Signup and view all the answers

    Why is it necessary to cover the cement used to close perforations with a base?

    <p>To prevent the bleaching agent from penetrating into the periodontal space</p> Signup and view all the answers

    What is the result of the oxidative reactions of bleaching agents?

    <p>Reversion of the chromatic change</p> Signup and view all the answers

    What is a characteristic of internal tooth bleaching?

    <p>Minimally invasive and conservative</p> Signup and view all the answers

    What is the primary goal of internal tooth bleaching?

    <p>To improve the aesthetics of the smile</p> Signup and view all the answers

    What is the significance of dentin in internal tooth bleaching?

    <p>Dentin must be cleaned to facilitate diffusion of the bleaching agent</p> Signup and view all the answers

    What is the primary focus of aesthetics in dentistry?

    <p>Psychosocial impact on an individual's self-perception</p> Signup and view all the answers

    What is the main difference between vital and non-vital bleaching?

    <p>Location of application</p> Signup and view all the answers

    What is a common indication for non-vital tooth bleaching?

    <p>Discoloration after root canal treatment</p> Signup and view all the answers

    Which of the following is a contraindication for non-vital tooth bleaching?

    <p>Periodontal disease</p> Signup and view all the answers

    What is the primary cause of non-vital tooth discoloration?

    <p>Blood decomposition in the pulp chamber</p> Signup and view all the answers

    What is the purpose of using GI or RMGI in non-vital tooth bleaching?

    <p>To prevent leakage of the bleaching material</p> Signup and view all the answers

    What is the primary goal of walking bleach technique?

    <p>To facilitate the bleaching process</p> Signup and view all the answers

    Which of the following is a complication of non-vital tooth bleaching?

    <p>Leakage of the bleaching material</p> Signup and view all the answers

    What is the term for the lightening of the color of a tooth through the application of a chemical agent?

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

    Why do teeth that have undergone root canal therapy often darken?

    <p>Because the pulp chamber and root canal system are sealed off from the bloodstream</p> Signup and view all the answers

    What is essential for nonvital bleaching to be effective on teeth with stable restorations?

    <p>The restorations must match the shade of the surrounding natural teeth</p> Signup and view all the answers

    Why is patient desire for aesthetics important in nonvital bleaching?

    <p>Because it is a suitable treatment option when patients desire an improvement in the aesthetics of their smile</p> Signup and view all the answers

    What is crucial for patient compliance in nonvital bleaching?

    <p>Good oral hygiene practices during and after the treatment</p> Signup and view all the answers

    What is the most important factor in the effectiveness of internal bleaching?

    <p>Precise removal of all restorative materials from the access cavity without additional dentin elimination</p> Signup and view all the answers

    Why is it essential to clean the dentin in internal bleaching?

    <p>To facilitate diffusion of the bleaching agent through the dentinal tubules</p> Signup and view all the answers

    What happens when a fiber post is cemented in the root canal and the pulp chamber is filled with composite resin?

    <p>Removing the restorative material and post can compromise the amount of sound dentin</p> Signup and view all the answers

    What is a contraindication for internal bleaching?

    <p>Presence of restorative materials in the access cavity</p> Signup and view all the answers

    Why is it necessary to remove all restorative materials from the access cavity?

    <p>To facilitate diffusion of the bleaching agent</p> Signup and view all the answers

    What is the primary reason for patient desire for aesthetics in nonvital bleaching?

    <p>To improve the aesthetics of their smile</p> Signup and view all the answers

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