The impact of endodontic irrigating solutions on the push-out shear bond strength of glass fiber posts luted with resin cements

Self-Instruction Exercise No. 379
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Exercise No. 379
Subject Code: 070
Endodontics

The 15 questions for this exercise are based on the article The impact of endodontic irrigating solutions on the push-out shear bond strength of glass fiber posts luted with resin cements on pages 26-30. 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:

  • describe intracanal irrigation systems and various resin cement systems;
  • understand the effect of each irrigation and cement system on bond strength of fiber posts to dentin; and
  • evaluate the impact of different combinations of endodontic irrigation and cements on the adhesion process.

Answers for this exercise must be received by December 31, 2016.
  1. How many teeth were used in this study?

    A. 66
    B. 76
    C. 86
    D. 96

  2. How many study groups were tested?

    A. 10
    B. 12
    C. 14
    D. 16

  3. All of the following materials were used in this study except one. Which is the exception?

    A. Fuji II LC
    B. Panavia F
    C. RelyX ARC
    D. Scotchbond Multi- Purpose

  4. The _______ sequence of Gates-Glidden drills was used for cervical flaring of the canals.

    A. 3, 2, 1
    B. 4, 3, 2
    C. 6, 5, 4
    D. 7, 6, 5

  5. What type of post was used in this study?

    A. glass fiber
    B. titanium
    C. carbon fiber
    D. ceramic

  6. The _________ test was performed on all sectioned roots.

    A. microtensile
    B. push-out shear
    C. Knoop hardness
    D. biaxial tensile

  7. All of the following statistical tools were used to analyze the data but one. Which is the exception?

    A. analysis of variance
    B. Tukey test
    C. SAS software
    D. Wilcoxon test

  8. The mean bond strength between intraradicular dentin and resin cement was significantly lower with 5.25% sodium hypochlorite + RelyX U100 than in the other groups tested. The mean bond strength was highest with 2.5% sodium hypochlorite + RelyX U100.

    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. All of the following can have adverse effects on intracanal adhesion except one. Which is the exception?

    A. intracanal morphology
    B. irrigating solution
    C. mechanical preparation
    D. cementum smoothness

  10. Bovine teeth were used for all of the following reasons except one. Which is the exception?

    A. Bovine teeth are easy to obtain.
    B. Bovine teeth selected have a more standardized anatomy.
    C. Bovine teeth and human teeth have different histologic properties.
    D. Bovine teeth have morphologic properties similar to those of human teeth.

  11. Sodium hypochlorite is a widely used endodontic irrigant. Sodium hypochlorite does not cause modifications of the intraradicular dentinal structure.

    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. All of the following describe highly concentrated sodium hypochlorite except one. Which is the exception?

    A. It is an oxidizing agent.
    B. It increases monomer polymerization.
    C. It diffuses into dentin.
    D. It may lead to degradation of dentin organic matrix.

  13. The authors recommend 2% chlorhexidine as an intracanal irrigant because it ____________.

    A. does not have an acidic pH
    B. does not interfere with dentinal adhesion
    C. enhances the effect of sodium hypochlorite
    D. bonds well to resin

  14. An exposure time of ____ minutes to ethylenediaminetetraacetic acid is sufficient to dissolve the inorganic particles in the smear layer without affecting the mechanical properties of dentin.

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

  15. The following reactions occur during RelyX U100 cementation except one. Which is the exception?

    A. formation of fluorapatite
    B. dual polymerization reaction
    C. formation of calcium phosphates
    D. generation of low energy

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
 
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