Spinal Facet Implant with Spherical Implant Apposition Surface and Bone Bed and Methods of Use
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United States of America Patent
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N/A
Issued Date -
Aug 20, 2015
app pub date -
Feb 17, 2014
filing date -
Feb 17, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Superior and/or inferior facets of one or more facet joints may be replaced by superior and/or inferior facet joint prostheses. In one embodiment, a kit of superior or inferior prostheses is provided, in which the prostheses have at least two dimensions that vary among members of the kit independently of each other. Each prosthesis may have a bone engaging surface having a surface that is polyaxially rotatable against a corresponding resection of a vertebra. Each prosthesis may also have an articulating surface shaped such that, after attachment to the spine, the replaced or partially replaced facet joints provide a larger medial-lateral range of motion when the spine is flexed than when the spine is extended. Crosslinks may be used to connect left and right prosthesis together in such a manner that they are stabilized in a position in which they are seated directly against the vertebra.
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