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Participants must answer at least 12 of 15 questions correctly (80%) to earn CE credit.

AGD - Self-Instruction Exercise No. 424 - Basic Science
Utilization of cone beam computed tomography to determine the prevalence and anatomical characteristics of bifurcated inferior alveolar nerves

Self-Instruction Exercise No. 424
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Exercise No. 424
Subject Code: 010
Basic Science

The 15 questions for this exercise are based on the article Utilization of cone beam computed tomography to determine the prevalence and anatomical characteristics of bifurcated inferior alveolar nerves on pages 22-26. This exercise was developed by Riki Gottlieb, DMD, MS, FAGD, in association with the General Dentistry Self-Instruction committee.

Reading the article and successfully completing this exercise will enable you to:

  • assess the prevalence of inferior alveolar nerve (IAN) bifurcations identified using cone beam computed tomography (CBCT);
  • determine the appropriate classification for each bifid IAN; and
  • consider how the anatomy of an IAN affects surgical and endodontic procedures.

Answers for this exercise must be received by June 30, 2019.

  1. The mandibular foramen is found on the ________ aspect of the __________.

    A. buccal; mental tubercle
    B. lingual; mental tubercle
    C. buccal; ramus
    D. lingual; ramus

  2. The IAN supplies innervation to all of the following structures except one. Which is the exception?

    A. taste buds on the dorsum of the tongue
    B. mucosa of the posterior tongue
    C. mandibular posterior dentition
    D. bone structure surrounding the nerve canal

  3. The anatomy of IANs can be broadly divided into __ different groups.

    A. 2
    B. 3
    C. 4
    D. 5

  4. Nortjé et al classified IAN bifurcations into __ types.

    A. 2
    B. 3
    C. 4
    D. 5

  5. Traditionally, practitioners have diagnosed bifid IANs via panoramic radiographs. Using CBCTs results in the same detection rate of bifid IANs as panoramic radiographs.

    A. Both statements are true.
    B. The first statement is true; the second is false.
    C. The first statement is false; the second is true.
    D. Both statements are false.

  6. A type __ bifurcated IAN demonstrates a superior canal extending to the second or third molar.

    A. 2
    B. 3
    C. 4
    D. 5

  7. Damage to one of the branches of a bifurcated IAN will likely cause all of the following reactions except one. Which is the exception?

    A. paresthesia
    B. dysesthesia
    C. kinesthesia
    D. complete loss of feeling

  8. All CBCT images used in the study were taken with a device manufactured by __________.

    A. Dentsply Sirona
    B. Planmeca
    C. Carestream
    D. Gendex

  9. A total of ____ images were analyzed in this study.

    A. 100
    B. 200
    C. 300
    D. 400

  10. How many scans were observed to show bifurcated IANs?

    A. 26
    B. 29
    C. 36
    D. 39

  11. Sex and race were not significant predictors of a greater prevalence of IAN bifurcation. The percentage of scans showing left IAN bifurcations was approximately twice the percentage of scans showing IAN bifurcations.

    A. Both statements are true.
    B. The first statement is true; the second is false.
    C. The first statement is false; the second is true.
    D. Both statements are false.

  12. Bilateral bifurcated IANs were observed on __% of scans.

    A. 5
    B. 4
    C. 3
    D. 2

  13. Statistical analysis was performed using a(n) _________ test.

    A. t
    B. Tukey
    C. analysis of variance
    D. chi-square

  14. Nortjé et al analyzed ______ panoramic images and reported an IAN bifurcation rate of ____ %.

    A. 5612; 19.9
    B. 3612; 19
    C. 5612; 1.9
    D. 3612; 0.9

  15. This study found that ___% of bifurcated IANs were Nortjé type __.

    A. 23; 1
    B. 33; 1
    C. 43; 2
    D. 53; 2


Evaluation

Please respond to the statements below, using the following scale:
1 Poor; 2 Below average; 3 Average; 4 Above average; 5 Excellent

Practicality of the content 1 2 3 4 5
Benefit to your clinical practice 1 2 3 4 5
Quality of illustrations 1 2 3 4 5
Clarity of objectives 1 2 3 4 5
Clarity of exercise questions 1 2 3 4 5
Relevance of exercise questions 1 2 3 4 5
 
Did this exercise achieve its objectives? Yes No
Did this article present new information? Yes No
How much time did it take you to complete this exercise? mins


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