Bellows-like expandable interbody fusion cage
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United States of America Patent
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Jul 19, 2016
Grant Date -
Jun 16, 2011
app pub date -
Dec 10, 2009
filing date -
Dec 10, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
An interbody fusion device having an accordion-like structure, wherein the device in inserted into the disc space in its collapsed configuration and then expanded into its expanded configuration by compressing the accordion-like portion of the device. In some embodiments, a pre-formed tube with an accordion-like structure over a portion of its length is inserted in a relaxed (collapsed) configuration, giving the tube a minimum possible diameter. This tube has a cable running through it that is fixed to a distal end portion of the tube and extends past the proximal end portion of the tube to the outside of the patient. Once the tube is positioned on the rim of the endplate, the proximal end of the cable is pulled, thereby tensioning the cable and causing the accordion portion of the tube to become shorter in length but larger in diameter.
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