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The JBJS Quiz of the Month is a collection of 10 relevant questions from each orthopaedic subspecialty. The questions are drawn from JBJS Clinical Classroom, which houses over 4,500 questions and 3,100 learning resources. Take the Quiz to see how you score against your peers!

NOTE: This quiz does not earn users CME credits. The questions must be answered within Clinical Classroom to earn CME credits.

Which of the following best describes the wear characteristics of metal-on-metal articulations?
    • Mechanical impingement typically occurs at a lower range of motion compared with metal-on-polyethylene articulation
      • Due to the larger head sizes that are used in metal-on-metal articulations, impingement occurs at a higher range of motion compared with metal-on-polyethylene

 

    • A decreased volume of particles are emitted compared with conventional polyethylene liners
      • A decreased volume of smaller particles are released as a result of metal-on-metal articulation wear.

 

    • They exhibit higher linear wear rates when compared with conventional polyethylene liners
      • Metal liners exhibit decreased wear compared with conventional polyethylene liners

 

    • Larger particles are released as a result of the articulation wear
      • Smaller particles are released as a result of articulation wear

     

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