Porous interbody fusion device having integrated polyaxial locking interference screws
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United States of America Patent
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-
May 6, 2003
Issued Date -
N/A
app pub date -
Apr 27, 2001
filing date -
Jan 30, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A porous metal intervertebral spacer having at least one angled through hole extending from the side of the implant to a surface which interfaces with a vertebral body end plate such that an interference screw may be driven through the implant and into the bone, thereby securing the implant from undesired motion. In particular, the through holes are tapered to receive a screw and coupling element therethrough such that once fully seated, the screw is locked to the implant by virtue of a coupling element-through hole mutually tapered nesting. The head of the screw is round, as is the interior of the coupling element, thereby allowing the screw to be inserted at various angles relative to the hole without interfering with the proper seating of the coupling element in the through hole.
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