Spinal implant adjustment device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 5, 2011
Grant Date -
Sep 28, 2006
app pub date -
Mar 24, 2004
filing date -
Mar 24, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An adjustable spinal implant (10) is provided for use in connecting elongate members (12) as well as vertebral spacers such as corpectomy devices, intervertebral fusion devices, and other prostheses. The implant (10) may have fittings (80) on either end comprising fixed (100) or articulating (200) jaws, endplates, or other engagement structures. The implant (10) comprises a housing (40) with an internal rotor (60); an extending shaft (20); and a locking collar (70). The extending shaft (20) has an external helical groove (23) that meshes with an internal helical groove (63) on rotor (20). Length adjustment occurs by transforming axial movement of the extending shaft (20) into a rotary movement of the rotor (60) via helical engagement. The locking collar (70) comprises protrusion (73) engaging grooves (63) of rotor (60), thus providing a simple, positive locking mechanism without requiring the surgeon to apply excessive force to lock the length.
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