Multi-axis connection and methods for internal spinal stabilizers
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United States of America Patent
Stats
-
Nov 27, 2012
Grant Date -
Jan 15, 2009
app pub date -
Jul 11, 2007
filing date -
Jul 11, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A multi-axis connection for transferring load from the vertebrae of a patient to a plate extending from one vertebra to another vertebra when affixed to the respective vertebrae by screws extending through holes in the plate at the level of the respective vertebrae, each screw being oriented at any of a plurality of angles relative to the plate. The threaded shank of each screw is screwed into the vertebral body and the head is positioned in the central portion of the hole, the hole being defined by an aperture, an opening through which the screw extends, and the central portion between aperture and opening. The diameter of the head is larger than the aperture of the hole in the plate and is provided with a screw thread that engages the smaller diameter aperture of the hole to pull the head into the central portion of the hole when the screw is rotated, the head of the screw being retained within the hole by the smaller diameter aperture and the opening of the hole.
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