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Design of a Hip Screw for Injection of Bone Cement

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Design of a Hip Screw for Injection of Bone Cement

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    Available in PDF Format | Design of a Hip Screw for Injection of Bone Cement.pdf | Unknown
    Caroline Grant
Fracture to the neck of femur is frequently stabilised with a hip screw system, however the host bone is often weak or osteoporotic. This causes premature failure of the system, commonly by cut-out of the lag screw through the head of the femur. While augmentation of the fixation with bone cement improves the holding power and decreases failure rate, current methods of administering the cement are messy and inaccurate. This project proposes a lag screw design which allows for direct injection of the cement, via the lag screw itself, after the screw has been inserted and correctly positioned in the femur. A method is also suggested to reduce the risk of cement leakage into the joint space when the guide wire has punctured the head of the femur. The design uses a system of holes in the threaded section of a cannulated screw to allow delivery of cement to the desired area. Testing was conducted in a synthetic bone analogue as well as in cadaveric porcine femurs.  
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Book details

  • PDF | 120 pages
  • Caroline Grant
  • VDM Verlag
  • Unknown
  • 5
  • Other
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