Revisiting implant-retained mandibular overdentures: planning according to treatment needs

Self-Instruction Exercise No. 353
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Exercise No. 353
Subject Code: 674
Fixed Removable Hybrid Prosthesis

The 15 questions for this exercise are based on the article, “Revisiting implant-retained mandibular overdentures: planning according to treatment needs”, on pages 60-64. This exercise was developed by Merlin Ohmer, DDS, FAGD, in association with the General Dentistry Self-Instruction committee.

Reading the article and completing the exercise will enable the reader to:

  • better understand overdenture concepts;
  • comprehend the use of implants to help retain mandibular overdentures; and
  • recognize the variation in implant-retained mandibular overdentures.

Answers for this exercise must be received by June 30, 2015.

  1. Implant retained mandibular overdentures (IRMODs) are reported to have a(n) _______% success rate.

    A. 50
    B. 75
    C. 85
    D. 95

  2. Routine recall visits for IRMODs should include all of the following except one. Which is the exception?

    A. panoramic radiograph
    B. check occlusion
    C. check retention
    D. oral hygiene

  3. The design of an IRMOD depends on ____ major factors.

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

  4. Retention systems for IRMODs may include “ball and cap” or “bar and clip” retention systems. The dentist should try to use >4 implants to retain the denture.

    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.

  5. All of the following help drive the design of an IRMOD except one. Which is the exception?

    A. attachment systems
    B. costs
    C. patient expectations
    D. medical status

  6. Metal frameworks in IRMODs are expected to

    A. provide a more hygienic prosthesis.
    B. decrease loading.
    C. decrease fracture resistance.
    D. transmit thermal changes.

  7. The minimum number of implants for a successful outcome in an IRMOD is

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

  8. The most prevalent IRMOD for completely edentulous patients uses _____ implants.

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

  9. What is the preferred area of placement for a 2-implant IRMOD?

    A. anterior area
    B. premolar area
    C. molar area
    D. There is no preferred area.

  10. The least favorable arch form regarding AP spread for a 4-implant IRMOD is a

    A. horseshoe.
    B. square.
    C. tapered.
    D. gothic.

  11. In a patient with a V-shaped ridge, the implants should

    A. be splinted.
    B. be placed posteriorly.
    C. not be used.
    D. be independent.

  12. Which type of ridge is more forgiving regarding an implant position in a 2-implant IRMOD?

    A. V-shaped
    B. U-shaped
    C. knife edge
    D. C-shaped

  13. An IRMOD with ___________ implant(s) provides for more treatment planning options.
    A. 1
    B. 2
    C. 3
    D. 4

  14. The number and placement of implants should follow a set formula. The ideal placement uses implants in the premolar area.

    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. When using a bar system, the minimum clearance from soft tissue to occlusal plane is

    A. 8-9 mm.
    B. 10-12 mm.
    C. 13-14 mm.
    D. 15-17 mm.


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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