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Antirotational hip screw

  • US 4,657,001 A
  • Filed: 07/25/1984
  • Issued: 04/14/1987
  • Est. Priority Date: 07/25/1984
  • Status: Expired due to Fees
First Claim
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1. An implantable hip screw adapted for internal fixation and compression of a fractured portion of the proximal femur comprisingplate and barrel means for attaching said hip screw to the lateral side of said femur, said plate and barrel means having a bore therethrough with said barrel being positioned wthin the femur,screw means comprising an elongated screw for internally fixing the fractured portion of said femur, said screw being slidingly received within said bore of said plate and barrel means and extending out of said barrel across the fracture line and into the fractured portion of said femur with the threads of said screw being located within the fractured portion, said screw including a head and said barrel includes a counterbore with said screw head being in bearing contact with a bearing surface created by said counterbore,compressing means for compressing said fractured portion ot said femur, said compressing means acting in conjunction with said screw means and said plate and barrel means, andmeans for preventing rotation of said fractured portion relative to said femur and for preventing rotation of said screw means within said plate and barrel means and for allowing axial sliding of said screw means relative to said plate and barrel means comprising one or more axial grooves in said bore of said barrel, one or more axial grooves in the surface of said screw, said grooves in said barrel and said screw being aligned with each other and an elongated rod positioned within each of said one or more aligned grooves.

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