Starting December 1, 2018, the Self-Instruction program will be exclusively available online. We will still publish Self-Instruction (S-I) exercises at the end of every corresponding General Dentistry article, but now you can pay online, test online, and receive your continuing education (CE) verification online. Earning CE has never been easier. 

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If you have any questions, or if you are unsure of your enrollment status, please call the Manager, Examinations and Self-Instruction, toll-free at 888.243.3368, ext. 4336.

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

AGD - Self-Instruction Exercise No. 431 - Occlusion
Masticatory evaluation of anterior open bite malocclusion using the colorimetric capsule method

Self-Instruction Exercise No. 431
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Exercise No. 431
Subject Code: 180
Occlusion

The 15 questions for this exercise are based on the article Masticatory evaluation of anterior open bite malocclusion using the colorimetric capsule method on pages 56-59. This exercise was developed by Brooke Elmore, DDS, FAGD, in association with the General Dentistry Self-Instruction committee.

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

  • understand the differences in masticatory force of a normal overbite versus an anterior open bite;
  • recognize when early orthodontic treatment can correct an anterior open bite; and
  • understand the methods by which masticatory forces can be measured.

Answers for this exercise must be received by October 31, 2019.

  1. The capsules used to measure masticatory force contain _________ granules.

    A. metachromatic
    B. fuchsin
    C. methylene blue
    D. volutin

  2. Greater masticatory efficiency was directly related to greater light absorbance. Absorbance decreased with the solution concentration.

    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. Anterior open bite affects ____% of the population between early childhood and late adolescence.

    A. 17
    B. 23
    C. 28
    D. 33

  4. Treating this malocclusion for the population aged 6-17 years is a challenge due to __________.

    A. compliance
    B. age
    C. skeletal development
    D. relapse

  5. Which skeletal change seen in anterior open bite cases is associated with weaker musculature?

    A. high mandibular angle
    B. retrognathic mandible
    C. decreased vertical growth
    D. maxillary protrusion

  6. Which is a disadvantage of measuring masticatory force with fractional sieving?

    A. availability
    B. lack of standardization
    C. cost
    D. solubility

  7. The main advantage of the colorimetric capsule method is _______________.

    A. recoverability
    B. cost-effectiveness
    C. ease of use
    D. capsule size

  8. All of the following are associated with anterior open bite except one. Which is the exception?

    A. dolichofacial pattern
    B. weaker masticatory muscles
    C. decreased vertical dimension
    D. decreased bite force

  9. Inclusion criteria included all of the following except one. Which is the exception?

    A. Class I molar relationship
    B. no crossbite
    C. no occlusal caries
    D. thumbsucking

  10. Children with an anterior open bite of at least ___ mm were selected for the experimental group.

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

  11. The children were seated and asked to masticate the capsule for ___ seconds.

    A. 5
    B. 10
    C. 15
    D. 20

  12. The data presented a normal distribution. Solution specimens from the experimental group showed statistically greater values of absorbance than did those from the control group.

    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. All of the following contribute to a decrease in masticatory force in an anterior open bite except one. Which is the exception?

    A. masseter muscle activity
    B. closing cycle duration
    C. vertical dimension
    D. anterior temporal muscle activity

  14. All of the following are complications of low masticatory force except one. Which is the exception?

    A. limitations on orthopedic treatments
    B. digestive disorders
    C. choking
    D. muscle fatigue

  15. What causes anterior open bite patients to lose sensitivity during mastication?

    A. inactivity of periodontal mechanoreceptors
    B. poor masticatory muscle efficiency
    C. lingual interposition or thumbsucking habits
    D. vertical facial growth pattern


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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