Dynamic hip screw

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Dynamic hip screw (DHS) or Intramedullary Hip Screw is a type of intramedullary device (designed for intertrochanteric and subtrochanteric fractures) which allows controlled sliding of the femoral head screw within the IM nail gliding hole.

[edit] Classification

Subcapital fracture; Garden's classification

  • Type I fractures have the best outcome. The bone ends are impacted into one another, which facilitates vascular re-growth.
  • Type II fractures are not impacted and are thus less stable. However there is minimal displacement of the bones from the anatomically normal position, and this is beneficial.
  • Type III fractures are complete but there is only partial displacement.
  • Type IV fractures are complete with total displacement. The two ends of bone are completely separated.

Fractures of type I & II are usually treated by internal fixation using a Dynamic hip screw.

[edit] References