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External dynamic bone fixation device

  • US 4,919,119 A
  • Filed: 05/16/1986
  • Issued: 04/24/1990
  • Est. Priority Date: 05/20/1986
  • Status: Expired due to Term
First Claim
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1. A dynamic external bone fixation device for the osteosynthesis of a broken joint, comprising:

  • (1) a first part comprising a first fixation rod having an axis a1 for connection to bone pins introduced into the bone on one side of said joint,(2) a second part comprising a second fixation rod having an axis a2 for connection to bone pins introduced into the bone on the other side of said joint, and(3) an articulating portion joining said first part and said second part, said articulating portion comprising;

    (a) a first curved surface to which said first part is connected and which fits with a second curved surface to which said second part is connected so as to allow adjustably limited movement of said first part with respect to said second part, both said first curved surface and said second curved surface having a common virtual axis spaced apart from said device, and(b) means for locating said common virtual axis so that said virtual axis may be aligned with the axis of said joint, wherein said means for locating said virtual axis is an integral element of said device.

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