JII BCS Exam: Kinematic Knee! Quiz

14 Questions | Total Attempts: 173

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JII BCS Exam Quizzes & Trivia

Questions and Answers
  • 1. 
    A study by Noble et al. (2005) concluded that patients who had TKA experience…
    • A. 

      Substantial functional impairment when compared with their age and gender matched peers

    • B. 

      Functional outcomes similar to that of their age and gender matched peers

    • C. 

      Substantial functional improvement when compared with their age and gender matched peers

    • D. 

      None of the above

  • 2. 
    Which factors contribute to the rationale for a kinematic knee?
    • A. 

      Conventional knee designs do not replicate the normal anatomy of the knee and thus they are unable to restore normal kinematics and muscular efficiency

    • B. 

      Conventional knee designs do not provide the same levels of satisfaction and return to function as seen in THA

    • C. 

      The prevalence of younger more demanding patients

    • D. 

      All of the above

  • 3. 
    A key characteristic to understand in relation to the native knee anatomy is that it is… 
    • A. 

      Asymmetrical

    • B. 

      Symmetrical

    • C. 

      Convex on both sides

    • D. 

      None of the above

  • 4. 
    When reviewing the articular geometry of the femur and tibia which of the following can be observed? 
    • A. 

      The distal condylar radius of the medial femoral condyle is rounder than that of the lateral femoral condyle

    • B. 

      The distal condylar radius of the medial femoral condyle is flatter than that of the lateral femoral condyle

    • C. 

      The medial femoral condyle has a larger posterior offset than that of the lateral femoral condyle

    • D. 

      The lateral tibial condyle is concave in shape and the medial tibial condyle is convex in shape (no constraint on AP motion)

    • E. 

      The medial tibial condyle is concave in shape and the lateral tibial condyle is convex in shape (no constraint on AP motion)

  • 5. 
    The knee is one of the most complicated joints in the body with six degrees of freedom.
    • A. 

      True

    • B. 

      False

  • 6. 
    The articular geometry, in part, contributes to the kinematics of the knee during motion. Additionally, the articular geometry gives rise to a…
    • A. 

      1 degree joint line present in the normal knee

    • B. 

      5 degree joint line present in the normal knee

    • C. 

      3 degree joint line present in the normal knee

    • D. 

      None of the above

  • 7. 
    In extension an angle is formed between the quadriceps and patella tendon, this angle is known as the ___ angle.
  • 8. 
    The Q angle, which ranges from 14-17°, affects…
    • A. 

      Quadriceps efficiency

    • B. 

      The efficiency of flexor muscles

    • C. 

      Medial/lateral translation of the knee

    • D. 

      A & B

  • 9. 
    In extension, the knee adopts the screw home position, which is a position of stability. In this position which of the following can be observed? 
    • A. 

      Femur internally rotated 5° (achieved by ACL pull)

    • B. 

      Femur externally rotated 5° (achieved by ACL pull)

    • C. 

      Slightly more posterior femoral overhang

    • D. 

      Knee joint is more congruent and quadriceps activity is not required

    • E. 

      Quadriceps activity increases utilized to stabilize the knee

  • 10. 
    Which of the following occurs during mid flexion (1-90°)?
    • A. 

      Automatic internal rotation of the femur out of the screw home position

    • B. 

      Automatic external rotation of the femur out of the screw home position

    • C. 

      Q-angle minimized to almost 0 degrees (increased quadriceps efficiency)

    • D. 

      The lateral femoral condyle is held in the concave tibial surface and the medial femoral condyle is free to move over the convex medial tibial surface. This results in a lateral pivot (rollback + femoral external rotation)

    • E. 

      The medial femoral condyle is held in the concave tibial surface and the lateral femoral condyle is free to move over the convex lateral tibial surface. This results in a medial pivot (rollback + femoral external rotation)

  • 11. 
    Which of the following occurs during full flexion (90-155°)?
    • A. 

      Point of contact shifts anteriorly during flexion

    • B. 

      The femur rolls and slides simultaneously (posterior translation) to provide clearance with the posterior tibia and space for the tissue behind the knee to allow deep flexion

    • C. 

      Axial rotation retained (not needed anymore as Q angle is near 0 degrees)

    • D. 

      Point of contact shifts posteriorly during flexion

    • E. 

      Axial rotation continues until maximum extension is reached

  • 12. 
    Satisfaction levels and return to functional activity following TKA are the same as that of THA.
    • A. 

      True

    • B. 

      False

  • 13. 
    What paradoxical motion can occur as a result of conventional knee design?
    • A. 

      The lack of ACL function leads to paradoxical anterior sliding of the femur during flexion

    • B. 

      During flexion the knee may pivot laterally, as opposed to the naturally occurring medial pivot

    • C. 

      During flexion the knee may pivot medially, as opposed to the naturally occurring lateral pivot

    • D. 

      A & B

  • 14. 
    Pitfalls of conventional knee design include?
    • A. 

      Asymmetrical femoral and tibial condyles, resulting in a 3° joint line

    • B. 

      No replication of ACL function of PS designs – lack of AP stability

    • C. 

      AP sulcus position is more posterior to allow deep flexion

    • D. 

      All of the above

    • E. 

      B & C

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