Surgery – Instruments – Orthopedic instrumentation
Reexamination Certificate
2011-03-01
2011-03-01
Barrett, Thomas C (Department: 3775)
Surgery
Instruments
Orthopedic instrumentation
Reexamination Certificate
active
07896902
ABSTRACT:
A top-loading multi-axial, double locking bone anchor assembly. A receiver member receives an internal saddle member, a bi-polar member, and a bone anchor through an open bottom, which are retained by an internal threaded ring member threaded onto the receiver member. A double-locking compression retaining member includes an external nut-like fastener and an internal setscrew-like fastener. The nut-like fastener attaches to an upper portion of the receiver member and interfaces with the internal saddle member to retain a desired angular position on the bone anchor and the setscrew-like fastener interfaces with an elongated member placed in a channel of the receiver member to retain it to the assembly. The bone anchor is capable of multi-axial as well as multi-polar positioning with respect to the receiver member.
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patent
Jeon Dong Myung
Moore Patrick Dennis
Barrett Thomas C
Morriss O'Bryant Compagni
Woodall Nicholas
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