Biocompatibility of a restorative resin-modified glass ionomer cement applied in very deep cavities prepared in human teeth

Self-Instruction Exercise No. 389
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Exercise No. 389
Subject Code: 017
Dental Materials

The 15 questions for this exercise are based on the article Biocompatibility of a restorative resin-modified glass ionomer cement applied in very deep cavities prepared in human teeth on pages 33-40. This exercise was developed by Kim Capehart, DDS, MBA, PhD(c), in association with the General Dentistry Self-Instruction committee.

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

  • identify the characteristics of resin-modified glass ionomer cements (RMGICs);
  • analyze the various studies of RMGICs; and
  • recognize the effects of different RMGICs on the pulp.

Answers for this exercise must be received by June 30, 2017.
  1. All of the following are reasons why conventional glass ionomer cements have been used as liners in dentistry except one. Which is the exception?

    A. acceptable mechanical and physical properties
    B. long-term antibacterial activity
    C. chemical adhesion to tooth structures
    D. mechanical adhesion to the dentinal structures

  2. The RMGICs do not allow adhesion to composite resin. Resin-based cements can be used as a liner or base for adhesive restoration.

    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. A resin-based light-cured cement, Vitrebond, caused no significant alterations in pulp tissue with a remaining dentin thickness (RDT) of less than _____ mm.

    A. 0.3
    B. 0.4
    C. 0.5
    D. 0.6

  4. The inflammatory reaction and disorganization of the odontoblastic layer observed 7 days after clinical procedures with Vitrebond were reversed ______ days later.

    A. 60
    B. 50
    C. 40
    D. 30

  5. The study was carried out in accordance with the Code of Ethics of the World Medical Association, also known as the Declaration of ____________.

    A. Geneva
    B. Helsinki
    C. Lichtenstein
    D. Prague

  6. __________ and _________ were used as control materials in this study.

    A. Vitremer; Vitrebond
    B. Dycal; Theracal
    C. Theracal; Vitrebond
    D. Vitrebond; Dycal

  7. The final dimensions of the buccal cavities were ____ mm long and _____ mm deep.

    A. 2.0; 1.5
    B. 2.5; 2.0
    C. 3.0; 2.5
    D. 3.5; 2.5

  8. __________ is a hard-setting calcium hydroxide liner.

    A. Theracal
    B. Calcimol
    C. Vitrebond
    D. Dycal

  9. Sectioned teeth were stored for 48 hours in formalin fixative solution at a pH of ______.

    A. 7.0
    B. 7.1
    C. 7.2
    D. 7.3

  10. The RDT between the cavity floor and the pulp chamber was measured using a ___________ microscope.

    A. compound
    B. confocal
    C. light
    D. scanning electron

  11. All of the following are caused through direct contact of 2-hydroxyethyl methacrylate (HEMA) except one. Which is the exception?

    A. dentin regeneration
    B. cell growth inhibition
    C. cell cycle arrest
    D. apoptosis

  12. Vitremer primer is composed of polycarboxylic acid, ethanol, photoinitiators, and _____ % of HEMA.

    A. 36
    B. 46
    C. 56
    D. 66

  13. A pulpal inflammatory response was noted when deep cavities were conditioned with _____% phosphoric acid for ______ seconds.

    A. 35; 15
    B. 40; 20
    C. 45; 25
    D. 50; 30

  14. One study reported 83% and 96% success rates for calcium hydroxide cement and a total-etch adhesive system, respectively. According to the authors, the success of indirect pulp capping does not depend on the dental material applied to dentin.

    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.

  15. The total number of teeth that had no inflammatory cell response to Dycal was ____.

    A. 4
    B. 6
    C. 8
    D. 10

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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Did this article present new information? Yes No
How much time did it take you to complete this exercise? mins

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