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Self-Assessment Examination


JPO Journal of Prosthetics and Orthotics: October 2007 - Volume 19 - Issue 4 - p 104-105
doi: 10.1097/JPO.0b013e3181579ccb
  • Free


  1. Read the article on pages 98–103.
  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 to the article, “Quantifying the Spring-like Properties of Ankle-Foot Orthoses (AFOs)” by Tom F. Novacheck, MD, Cammie Beattie, PT, Adam Rozumalski, MS, George Gent, CO, and Gary Kroll, BOCO, CO, RTO.


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  1. T/F The purpose of this article is to assess the ability of a specific orthotics stiffness-tester to quantify biomechanical properties of stiffness and energy return of five different KAFO designs.
  2. [Select the correct response.] All of the following represent PLS AFO designs EXCEPT:
    1. Carbon fiber
    2. Standard
    3. Kevlar
    4. Chevron
  3. T/F The device was found to be repeatable for stiffness, but not for energy storage.
  4. T/F As a result of the study, it was determined that speed affected stiffness calculations, but that size was not statistically significant.
  5. T/F The newer designs (i.e., chevron and carbon fiber) were created to have a greater capacity for energy storage than the single layer PLS AFO.
  6. T/F Just recently a method has been developed to use gait data to deduce the properties of an AFO that are most appropriate to improve an individualÆs gait prior to AFO fabrication and fitting.
  7. T/F All of the AFOs in the Standard PLS design category had identical spring curvature, which was meant to reduce the variability of structural stiffness.
  8. T/F All carbon fiber AFOs had a curved leaf design, which was done to increase the variability that a curved radius has on the mechanics of the leaf spring.
  9. [Select the correct response.] AFOs may be prescribed for many different reasons, including any or all of the following:
    1. Improved foot alignment
    2. Support for weak musculature
    3. Control of tonal abnormalities
    4. All of the above
    5. None of the above
  10. [Select the correct response.] If an individual has inadequate function to generate the force required for stance phase support and terminal stance push off, a properly designed may be able to compensate for some of these deficits.
    1. plantarflexor … KAFO
    2. plantarflexor … AFO
    3. dorsiflexor … AFO
    4. dorsiflexor … KAFO
  11. T/F Concerning the stiffness category, there is a much greater difference between the flexible and the moderate categories than between the moderate and firm categories.
  12. T/F As a result of the study, it was determined that the Katdare orthotics stiffness tester was capable of reliably quantifying energy storage during testing of these AFOs in dorsi- and plantarflexion.

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, $50 nonmembers) to: AAOP, P.O. Box 34937, 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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© 2007 American Academy of Orthotists & Prosthetists