Published 10/1/2012

Orthopaedic Trivia Quiz

AAOS Now tests your knowledge of orthopaedic trivia. Take a minute and see how well you know your orthopaedic trivia—but don’t peek at the answers! An expanded explanation of the correct answers can be found in the online version, available at www.aaosnow.org

1. Many fractures are known by those who first described them. Match the following eponyms to the fractured bone.

    1. Barton fracture
    2. Chopart fracture
    3. Maisonneuve fracture
    4. Stieda fracture
    5. Rolando fracture
  1. Thumb metacarpal
  2. Distal radius
  3. Midfoot
  4. Proximal fibula
  5. Femoral condyle

2. Some fractures are described by their etiology or the occupation of persons most likely to sustain them. Match the following descriptions to the fractured bone.

    1. Nightstick fracture
    2. Boxer’s fracture
    3. Chauffeur’s fracture
    4. Clay-shoveler’s fracture
    5. Hangman’s fracture
  1. Radial styloid
  2. Ulna
  3. Second cervical vertebra
  4. Fifth metacarpal neck
  5. Lower cervical or upper thoracic vertebrae

3. Aviator’s astragalus describes a fracture often sustained by pilots in the early 20th century. What is the more current name for this injury?

  1. Fracture of the 5th lumbar vertebra
  2. Fracture of the anterior-inferior iliac wing
  3. Fracture of the talus
  4. Fracture of the olecranon
  5. Fracture of the metatarsals

4. For which of the following would lengthening be most likely indicated?

  1. Brachydactyly
  2. Ectrodactyly
  3. Camptodactyly
  4. Clinicodactyly

If you have orthopaedic trivia you think would be of interest to AAOS Now readers, email it to aaoscomm@aaos.org; fax to 847-823-8033; or mail to Orthopaedic Trivia—AAOS Now, 6300 N. River Rd., Rosemont, Ill. 60018-4262.


  1. A-2, B-3, C-4, D-5, E-1
  2. A-2, B-4, C-1, D-5, E-3
  3. C—Astragalus was an early name for the talus, and the fracture “aviator’s astragalus” was caused by the impact of the rudder bar, which was controlled by the pilot’s foot.
  4. A—Brachydactyly, shortness of the fingers or toes. Ectrodactyly describes a deficiency or absence of one or more of the central digits of the hand or foot (“lobster-claw hand”). Camptodactyly indicates a fixed flexion deformity of the interphalangeal joint of a finger, usually the little finger. Clinicodactyly is a bending or curvature of a finger (again, usually the little finger).