Spinal fusion instrumentation system
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United States of America Patent
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-
May 25, 2004
Grant Date -
Apr 25, 2002
app pub date -
Nov 2, 2001
filing date -
Apr 6, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Instrument systems and methods for the fusion of two or more adjacent vertebrae include devices to facilitate placement of screws and plates to stabilize the vertebrae and instruments to facilitate parallel decortication of the vertebral endplates prior to insertion of the bone graft. A targeter allows proper placement of a plurality of vertebral screws into the vertebral bodies. A distractor is temporarily attached to the vertebral screws and a bushing is inserted between the two arms of the distractor. The bushing acts as a guide for a cutting tool, to allow the perfect parallel decortication of the vertebral endplates. After insertion of the bone graft, a plate is affixed to the vertebral screws using locking screws, to stabilize the joint so that fusion may occur. The invention features a novel bushing that allows parallel decortication of the vertebral endplates to facilitate fusion.
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