Device for connecting a longitudinal support with a pedicle screw
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United States of America Patent
Stats
-
Jun 19, 2001
Grant Date -
N/A
app pub date -
Nov 16, 1999
filing date -
May 17, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a device for connecting a longitudinal rod with a bone anchoring element, such as a pedicle screw, thereby forming a system for fixation of the spine. The device includes a connecting member having upper and lower ends, a bore hole which is open at least towards the lower end and has a central axis, and a through hole positioned perpendicular to the central axis. The device also has a tensioning member insertable in the upper end of the connecting member for securing the bone anchoring element to the connector at a surgeon selected angle. A radially compressible spring chuck is arranged within the connecting member and has a cavity for receiving the head of the bone anchoring element. An insert slides into the bore hole of the connecting member and has a recess with a shape complementary to the outer surface of the spring chuck. The spring chuck is axially supported in the bore hole in such a fashion that radial movement of the spring chuck is not affected.
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