Analysis of total microbiota in dentin after mechanical or papain-based chemomechanical caries removal

Self-Instruction Exercise No. 333
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Exercise No. 333
Subject Code: 250
Operative (Restorative) Dentistry

The 15 questions for this exercise are based on the article, “Analysis of total microbiota in dentin after mechanical or papain-based chemomechanical caries removal.” This exercise was developed by Gustav Gates, DDS, MAGD, in association with the General Dentistry Self-Instruction committee.

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

  • understand the difference between conventional and chemomechanical caries removal methods;
  • understand the components of chemomechanical caries removal materials; and
  • review the physiological process of the carious dentinal lesion.

Answers for this exercise must be received by June 30, 2014.
  1. Chemomechanical caries removal has been shown to do all of the following except one. Which is the exception?

    A. Reduce patient discomfort
    B. Shorten treatment time
    C. Decrease deleterious effects on the pulp
    D. Preserve tooth structure

  2. Teeth that were used in the study were _______________.

    A. maxillary bicuspids
    B. maxillary molars
    C. mandibular bicuspids
    D. mandibular molars

  3. Compared to chemomechanical removal methods, conventional removal methods appear to remove healthy tooth structure. These conventional methods can cause more psychological trauma to the patient.

    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.

  4. Analysis of the total number of microorganisms present was performed at caries removal, then at ____ days after caries removal.

    A. 15
    B. 30
    C. 45
    D. 60

  5. Carisolv is composed of all of the following amino acids except one. Which is the exception?

    A. Tryptophan
    B. Lysine
    C. Leucine
    D. Glutamic acid

  6. Carisolv removes infected dentin more effectively than demineralized dentin; however, it will decompose collagen fibers.

    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.

  7. The first commercially available chemomechanical caries removal system was _____________.

    A. NMAB
    B. GK101E
    C. Carisolv
    D. Papacarie

  8. What was used to collect dentin during initial evaluation?

    A. No. 1 carbide bur at slow speed
    B. Dental excavator
    C. No. 3 carbide bur at high speed
    D. No. 8 carbide bur at slow speed

  9. Papacarie was placed in the cavity for exactly _____ minute(s) during the initial chemomineralization treatment.

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

  10. Papacarie was used for a total treatment time of ____ minutes.

    A. 3
    B. 6
    C. 9
    D. 12

  11. At the initial treatment, Group 1 infected dentin appeared ______.

    A. disorganized
    B. black
    C. shiny
    D. rigid

  12. After initial treatment, glass ionomer was used to restore both Group 1 and Group 2 teeth. At the end of the study, microhybrid composite resin was used for the final restorations.

    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.

  13. Differential clinical diagnosis between infected and affected dentin depends on all of the following except one. Which is the exception?

    A. Color
    B. Consistency
    C. Dentist’s skill
    D. Choice of instrumentation

  14. The use of papain-based chemomechanical agents produced all of the following results except one. Which is the exception?

    A. Reduced microorganism counts
    B. Less sensitivity to the patient
    C. Removal of necrotic dentin
    D. Deep penetration into cavity

  15. Patients were selected for the study if they had decay on the _______ surface of the tooth.

    A. lingual
    B. buccal
    C. proximal
    D. occlusal

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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