Apparatus for implantation into bone
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United States of America Patent
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Apr 22, 2003
Grant Date -
May 9, 2002
app pub date -
Mar 19, 2001
filing date -
Nov 8, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus (10) is provided for implantation into a bone (12) in a patient's spine or pelvis. The apparatus (10) comprises a platform (24) having a first surface (38) for facing the bone (12). The platform (24) includes structure (32, 34, 36) for connection to a spinal fixation implant (100). The apparatus (10) further comprises helical spikes (50, 52) for embedding into the bone (12) upon rotation of the platform (24). The helical spikes (50, 52) project tangentially from the platform (24) and extend around a longitudinal axis (22). The helical spikes (50, 52) have a tip portion (58) which penetrates into the bone (12) as the platform (24) is rotated. The helical spikes (50, 52), when implanted, have a conical shape that increases in diameter as the helical spikes extend away from the platform (24). The helical spikes (50, 52) may be made from a shape memory alloy.
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