Presentation
Status post hip surgery, persistent pain.
From the case:
Dynamic hip screw - implant failure
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Implant failure on the right with malunion of the non-ossified fracture. Normal dynamic hip screw on the left.
Case Discussion
Normal post-op dynamic hip screw (DHS) appearance:
- the lag screw should be in the center of the femoral head
- the tip of the lag screw should be ~0.5 inches away from the femoral head articular surface
- side-plate closely abutting lateral femoral cortex without any gap
- screws for plate fixation should just penetrate the medial femoral cortex