Surgical instrument for moving a vertebra
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United States of America Patent
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-
Nov 18, 2003
Grant Date -
N/A
app pub date -
Sep 6, 2002
filing date -
Sep 6, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A surgical instrument comprises a first device including an actuatable clamp for clamping on a fastener fixed to a first bone portion and a carriage that is movable relative to the clamp when subjected to a predetermined axial load. A second device includes a portion adapted for threaded engagement with the carriage and an end portion for supporting a member for securing a rod connected to a second bone portion to the fastener. Relative rotation between the first and second devices causes relative axial movement between the second device and the carriage of the first-device. The carriage is stationary relative to the clamp of the first device when a force necessary to produce relative movement between the first and second bone portions is below the predetermined axial load so that relative rotation between the first and second devices first bone portion relative to the second bone portion.
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