MS- ORIF.txt

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MS- ORIF.txt
2015-03-02 18:09:48
musculoskeletal ORIF

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  1. Four classic stages of bone healing.
    inflammation, soft callus, hard callus, remodeling
  2. Primary bone healing is characterized by... (2)
    minimal callus formation and direct remodeling (cutting cones) across the fracture site
  3. 5 forces that act on bone.
    compression, bending, rotation/torsion, shear, tension
  4. What forces do K-wires counteract?
    minor bending forces, rotation (multiples)
  5. Steinmann pins are used in _______; what force(s) do they counteract?
    IM pinning; bending
  6. What bones are steinmann pins commonly used in? What bone should they never be used in?
    • Used in: ulna, humerus, femur, and tibia
    • NEVER use in the radius (no safe point of entry that is not an articular surface)
  7. How are orthopedic wires used?
    cerclage, hemi-cerclage, tension band, interfragmentary wire
  8. Cerclage fixation has very little resistance to __________.
  9. Interlocking nails have the _______ strength of an IM pin and add the ability to neutralize __________ and _________.
    bending; compression; torsion/rotation
  10. In what bones can interlocking nails be used?
    humerus, femur, and tibia
  11. ________ screws are self-tapping.
  12. 3 ways bone plates can be used.
    neutralizing, compression, buttress (bridging)
  13. Neutralization plating is used when needed to neutralize ___________________.
    axial forces across a fracture
  14. Compression plating is used when ____________ and _____________ are achievable and desired with the goal of _____________.
    anatomic reduction; interfragmentary compression; primary bone healing
  15. Bridging/ buttress plating is used for ______________.
    comminuted, unstable fractures
  16. Bone plates should be placed on the __________ surface of the bone.
  17. If plating must occur on the compression surface, _____________ is significantly compromised.
    resistance to bending
  18. DCPs and LC-DCPs are used in...
    neutral, compression, or bridging