Ultrasonic Root End Preparation in Endodontics
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Questions and Answers

What is the primary purpose of the root-end filling?

  • To remove potentially contaminated debris
  • To seal the canal system apically and prevent the egress of bacteria (correct)
  • To promote cementogenesis
  • To expose the apical collagen fibers
  • Why should EDTA not be used when mineral trioxide aggregate (MTA) is used as a root-end filling material?

  • Because it may lead to the staining of periradicular tissues
  • Because it may cause damage to the surrounding tissues
  • Because it may interfere with the hard tissue-producing effect of MTA (correct)
  • Because it may reduce the adhesion of MTA to tooth structure
  • What is the recommended treatment for the root face after root-end resection?

  • Inspection to ensure cleanliness
  • Removal of the smear layer and exposure of the apical collagen fibers (correct)
  • Drying with paper points
  • Irrigation with sterile saline or water
  • What is the optimal exposure of collagen and demineralization achieved with?

    <p>A burnishing application of citric acid (pH 1.0) for 3 minutes</p> Signup and view all the answers

    What is a crucial requirement for an ideal retrograde filling material?

    <p>It should be well tolerated by surrounding tissues</p> Signup and view all the answers

    What is the primary purpose of isolating the root-end cavity before filling?

    <p>To achieve moisture control</p> Signup and view all the answers

    What is the purpose of using vasoconstrictors in the surgical site?

    <p>To reduce blood flow and facilitate the procedure</p> Signup and view all the answers

    What is the main advantage of using IRM (intermediate restorative material) as a retrograde filling material?

    <p>It provides a good seal and milder tissue reaction</p> Signup and view all the answers

    What is the correct sequence of steps in the MTA placement technique?

    <p>Pack the surrounding bone with a sterile gauze, then mix powder and liquid</p> Signup and view all the answers

    What is a common complication associated with the use of amalgam as a retrograde filling material?

    <p>Corrosion and persistence of periapical inflammation</p> Signup and view all the answers

    What is the primary goal of root resection?

    <p>To eliminate the weak, diseased root to allow the stronger ones to survive</p> Signup and view all the answers

    What is a contraindication for root resection?

    <p>The remaining roots have inadequate periodontal-osseous support</p> Signup and view all the answers

    What is the procedure that involves vertical, surgical division of the entire tooth from mesial to distal in maxillary molars?

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

    What is the main factor that determines the prognosis of root resection?

    <p>The patient's ability to perform good oral hygiene</p> Signup and view all the answers

    What is the procedure that involves penetrating into the pulp space to treat a defect?

    <p>Root canal treatment</p> Signup and view all the answers

    What is the primary objective of creating a root-end cavity?

    <p>To create a cavity into which a root-end filling can be placed</p> Signup and view all the answers

    What is the significance of preparing the cavity parallel to the anatomic outline of the pulp cavity?

    <p>It allows for better retention form</p> Signup and view all the answers

    What is the advantage of using ultrasonic root-end cavity preparation?

    <p>It provides better access and smaller size osteotomy</p> Signup and view all the answers

    What is the consequence of not removing the isthmus tissues during root-end cavity preparation?

    <p>The root-end filling may not seal properly</p> Signup and view all the answers

    What is the primary benefit of using ultrasonic root-end cavity preparation in molar roots?

    <p>It is effective in the debridement and enlargement of canal anastomoses and irregularities</p> Signup and view all the answers

    What is the primary goal of guided tissue regeneration in endodontic surgery?

    <p>To prevent apical migration of gingival epithelium and allow tissue derived from the periodontal ligament to repopulate the space adjacent to the denuded root surface</p> Signup and view all the answers

    Indications of guided tissue regeneration in endodontic surgery include which of the following?

    <p>Large periapical lesions and through and through lesions</p> Signup and view all the answers

    Intentional replantation involves which of the following?

    <p>Extracting a tooth, correcting its deficiencies outside of the mouth, and replanting it into its original socket</p> Signup and view all the answers

    When should intentional replantation be considered?

    <p>As a treatment of last resort</p> Signup and view all the answers

    What is an indication for intentional replantation?

    <p>Absolute inoperable root canal treatment in situ</p> Signup and view all the answers

    What is the primary treatment approach for furcation perforation?

    <p>Non-surgical repair</p> Signup and view all the answers

    What is the recommended treatment for cervical defects that do not penetrate into pulp space?

    <p>Envelope flap with curettage and preparation</p> Signup and view all the answers

    What is the primary approach for strip perforation repair?

    <p>Non-surgical repair</p> Signup and view all the answers

    What is the treatment for midroot and apical root perforations?

    <p>Root amputation or hemisection</p> Signup and view all the answers

    What is the classification of surgical procedures for tooth resection?

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

    What is the primary indication for hemisection?

    <p>Fracture of the tooth across the marginal ridge</p> Signup and view all the answers

    What is the goal of bicuspidization?

    <p>To open the molar furcation area for easier maintenance and cleaning</p> Signup and view all the answers

    What is the outcome of hemisection in the given scenario?

    <p>The mesial half of the tooth is retained as a bicuspid</p> Signup and view all the answers

    What is the first step in the hemisection procedure?

    <p>Raising a sulcular flap without a vertical-releasing incision</p> Signup and view all the answers

    What is the purpose of the vertical cut in the hemisection procedure?

    <p>To separate the tooth into two segments</p> Signup and view all the answers

    What is the contraindication for retaining half of a molar?

    <p>Inadequate bony support for the retained half</p> Signup and view all the answers

    What is the procedure that involves dividing the clinical crown into two halves?

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

    What is the outcome of bicuspidization?

    <p>The molar furcation area is opened for easier maintenance and cleaning</p> Signup and view all the answers

    What is the restoration of choice after hemisection?

    <p>Permanent coronal restoration</p> Signup and view all the answers

    What is the primary advantage of bicuspidization?

    <p>Easier maintenance and cleaning of the molar furcation area</p> Signup and view all the answers

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