Comparison of the effectiveness of 3 irrigation devices for the cleaning of root canal walls instrumented with oscillatory and rotary techniques

Self-Instruction Exercise No. 366
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Exercise No. 366
Subject Code: 070
Endodontics

The 15 questions for this exercise are based on the article, Comparison of the effectiveness of 3 irrigation devices for the cleaning of root canal walls instrumented with oscillatory and rotary techniques, on pages 71-74. This exercise was developed by Anthony S. Carroccia, DDS, MAGD, ABGD, in association with the General Dentistry Self-Instruction Committee.

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

  • understand the implications of cleansing the root canal system with irrigants;
  • learn the factors that affect successful irrigation; and
  • appreciate any differences between the irrigation devices used in the study.

Answers for this exercise must be received by February 29, 2016.
  1. Which area of the root canal was cleansed the least efficiently according to scanning electron microscopic analysis?

    A. canal orifice
    B. cervical third
    C. middle third
    D. apical third

  2. The cleaning effectiveness of the root canal irrigation depends on canal anatomy and its instrumentation. The effectiveness also depends upon the flow rate and irrigation delivery device.

    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.

  3. All of the following are considered a chemical property of the irrigant except one. Which is the exception?

    A. antibacterial
    B. fluid
    C. flushing
    D. chelating

  4. Which of the following irrigation devices is considered a traditional needle?

    A. Endo-Eze
    B. Endo-Eze FX
    C. NaviTip FX
    D. NaviTip

  5. All of the following types of teeth were used for the study except one. Which was the exception?

    A. maxillary incisors
    B. mandibular canines
    C. maxillary premolars
    D. mandibular molars

  6. In the oscillatory instrumentation, the apical preparation was performed by using files up to size No. ____.

    A. 45
    B. 35
    C. 25
    D. 15

  7. In the rotary instrumentation, which files were used to finish the shaping of the working length?

    A. S1 and F1
    B. S2 and F2
    C. S1 and S2
    D. F1 and F2

  8. Final irrigation was done with 1 ml of 17% EDTA for 3 minutes. It was neutralized with 5 ml of 5.2% NaOCl.

    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.

  9. The tooth specimens were mounted on __________ stubs.

    A. aluminum
    B. iron
    C. gold
    D. palladium

  10. Which statistical test was used to assess the interaction effect?

    A. Chi-square test
    B. Pearson correlation test
    C. Tukey’s multiple comparison test
    D. Wilcoxon rank-sum test

  11. Which group had the lowest mean assessment in the apical third?

    A. Rotary with Endo-Eze
    B. Rotary with NaviTip
    C. Oscillatory with Endo-Eze
    D. Oscillatory with NaviTip

  12. In this study, a _________ magnification under a scanning electron microscope was used.

    A. 50X
    B. 200X
    C. 500X
    D. 2000X

  13. Limited cleansing of the root canal can be the fault of all of the following except one. Which is the exception?

    A. wide access
    B. fluid dynamics
    C. flushing action
    D. limited apical size

  14. Goel & Tewari compared __________ and ____________ irrigators and found no differences between them at 400X magnification.

    A. Endo-Eze; ultrasonic
    B. NaviTip FX; ultrasonic
    C. Endo-Eze; NaviTip
    D. NaviTip; NaviTip FX

  15. Irrigant exchange occurs no further than ____ mm beyond the needle tip of the irrigation device.

    A. 1
    B. 2
    C. 3
    D. 4

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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