Disassembly of a modular femoral component after femoral head prosthetic replacement.

@article{Shiga2010DisassemblyOA,
  title={Disassembly of a modular femoral component after femoral head prosthetic replacement.},
  author={Toshiki Shiga and Masaki Mori and Tatsuro Hayashida and Yasuhiro Fujiwara and Taku Ogura},
  journal={The Journal of arthroplasty},
  year={2010},
  volume={25 4},
  pages={659.e17-9}
}
We report a rare case of a taper-locked femoral inner head that have been completely separated from the stem neck. A 76-year-old man who had hip fracture of the right hip had disassembly of inner head and stem neck after revision of bipolar hip prosthesis. This force could have been amplified by the pumping phenomenon generated after the revised inner head. We suspect the sealed air pushes back the stem neck, and unlocks the taper lock of the inner head, causing separation of the stem neck from… CONTINUE READING