Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Reexamination Certificate
2009-09-25
2011-12-06
Barrett, Thomas C. (Department: 3733)
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
C623S017110
Reexamination Certificate
active
08070819
ABSTRACT:
A fixation device including a housing, a shaft and a plurality of blades preloaded onto the shaft. The housing includes a leading deep surface, a trailing outer surface, weight bearing sides, and top and bottom surfaces. The shaft runs from the leading deep surface to the trailing outer surface of the housing. The plurality of blades includes at least one first blade having at least one cutting extension in a first orientation about the axis of the shaft and at least one second blade having at least one cutting extension in a second orientation about the axis of the shaft that is opposite to the first orientation. Each cutting extension of the blades has a sharp leading edge, wherein upon clockwise or counterclockwise rotation of each blade of the plurality of blades about the axis of the shaft in a direction in which the at least one cutting extension of each blade is oriented, the at least one cutting extension of each blade will break an endplate of a vertebra, hook into the vertebra and rigidly secure the vertebra to the device to prevent separation of the vertebra from the device during spinal motion.
REFERENCES:
patent: 6770096 (2004-08-01), Bolger et al.
patent: 7238203 (2007-07-01), Bagga et al.
Aferzon Joseph
Aferzon Joshua
Alphatec Spine, Inc.
Barrett Thomas C.
Hammond Ellen C
Shevlin Michael R.
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