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Self-Assessment Examination


JPO Journal of Prosthetics and Orthotics: October 2004 - Volume 16 - Issue 4 - p 138-139
  • Free


  1. Read the article on pages 130–137.
  2. Complete the examination.
  3. Submit your completed examination to the AAOP per the directions on the next page.


The following questions require short answers only; you do not have to use complete sentences. All questions refer the article: “Overview of Knee Disarticulation,” by Gerald Stark, BSME, CP, FAAOP.


Please allow 2–4 weeks for processing.

  1. List two (2) of the three reasons why Dr. Pinzur of Loyola University has been an advocate for the knee disarticulation level—because of the combined advantages of: [Any two answers will suffice.]
  2. Select the correct surgical advantage:
    1. increased surgical blood loss
    2. increased resistance to infection
    3. definitively more bony or muscular disruption
  3. True or False: Because knee disarticulation preserves the femoral epiphysis and avoids bony overgrowth, it is often used pediatrically.
  4. Supply the missing answer with a complete sentence. One of the more obvious disadvantages of knee disarticulation prostheses is:_____________________ __________________________________________________________
  5. Select the correct answer: The frontal plane biomechanics for the knee disarticulation is: a) identical to b) different than c) similar to that of the transfemoral prosthesis if there is true end bearing.
  6. Fill in the two blanks with the correct terms. One of the goals of the transfemoral interface is to displace the fulcrum medially at the_____________________ rather than the physiologic fulcrum at the _____________________ in order to decrease the overall weight moment.
  7. Fill in the blank with the correct term: A common error is to treat a knee disarticulation patient as a _____________________ patient with high medial trimline and circumferential tension, which inhibits end-bearing.
  8. List the two (2) goals when taking the impression:
    1. __________________________________________________________
    2. __________________________________________________________
  9. True or False: During the impression taking, no ischial or gluteal modification is necessary unless the user cannot tolerate full end-bearing.
  10. Fill in the blanks with the correct terms. A common type interface and suspension for knee disarticulation is a flexible _____________________ in combination with _____________________.
  11. Name three (3) types of interface for knee disarticulation:
    1. __________________________________________________________
    2. __________________________________________________________
    3. __________________________________________________________
  12. Fill in the blank with the correct term. _____________________ knees present the widest array of control mechanisms from friction, pneumatic, and hydraulic to other features such as stance control.
  13. Select the correct answer. _____________________ knees enjoy the greatest popularity for knee disarticulation because they locate the instant center more proximally and provide toe clearance during swing phase.
  14. a) monocentric b) polycentric c) ethnocentric
  15. Fill in the blank with the correct term. The _____________________ is found by projecting a line proximally thru the polycentric links viewed in the sagittal plane.

Complete the JPO Self-Assessment Examination on the previous page and score a minimum of 75 percent to earn two PCE credits. Send the completed examination and payment in U.S. currency ($20/AAOP members, $40/nonmembers) to: AAOP, Dept. 937, Alexandria, VA 22334-0937. The examination must be received by the AAOP within 3 years of the publication date for credit to be awarded.


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© 2004 American Academy of Orthotists & Prosthetists