MCQs in Endodontics

Chapter 17: Endo-Perio relationship


1-The highest percentage of lateral canals occurs:

  1. in the coronal third of the root.
  2. in the middle third of the root
  3. in the apical third of the root.
  4. anywhere along the root, depending on the tooth in question.







The answer is: B


2- Treatment of pulpal diseases that cause periodontal diseases usually requires:

  1. endodontic treatment alone.
  2. both endodontic and periodontal treatment.
  3. periodontal surgery and curettage.
  4. combined periradicular and periodontal surgery.






The answer is: A


3- Studies on the effects of periodontal disease on the pulp have shown:

  1. pathologic pulp changes.
  2. degenerative pulp changes.
  3. no pulp changes.
  4. all of the above.







 The answer is: D


 4- Which of the following statements concerning a sinus tract of pulpal origin is false:

  1. The tract is usually thinner than an infrabony periodontal pocket.
  2. Vitality tests may evoke an unaltered, normal response.
  3. Pain is not often present.
  4. It can be traced to the source of irritation.







The answer is: B


5- Which of the following statements concerning a primary endodontic lesion with secondary periodontal disease is false:

  1. This condition occurs with long-standing pulpal disease and chronic periapical drainage.
  2. Radiographs may show- generalized periodontal disease with angular defects at the initial site of endodontic involvement.
  3. Resolution of the lesion requires both endodontic and periodontal therapy.
  4. If appropriate endodontic therapy is performed all bone loss will heal.







The answer is: D


6- In a primary periodontic lesion with secondary endodontic involvement:

  1. there is a history of extensive periodontal disease.
  2. the pulp always responds to vitality tests.
  3. pain is usually absent.
  4. periodontal therapy should precede endodontic therapy.






The answer is: A


 7- The concomitant pulpal-periodontal lesion:

  1. is another name for the combined endodontic-periodontic lesion.
  2. requires either periodontal or endodontic treatment.
  3. radiographically may simulate a vertical fracture.
  4. depends for its prognosis on the success of periodontal treatment.






The answer is: D


8- The most common cause of root resection failures is:

  1. progressive periodontal disease.
  2. recurrent endodontic pathosis.
  3. root fracture.
  4. poor oral hygiene.







The answer is: C