Expandable fusion cage
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United States of America Patent
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Jun 24, 2003
Grant Date -
N/A
app pub date -
Oct 31, 2001
filing date -
Oct 31, 2000
priority date (Note) -
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status (Latency Note)
Importance
Abstract
Disclosed is an expandable fusion cage which facilitates the fusion of adjacent bony surfaces, preferably those in the spine. In a preferred embodiment, the fusion cage. The surfaces of the cage which are intended to contact the vertebral endplates have multiple portions cut out of the metal to form sharp barbs. As the cage is expanded to come into apposition with endplates above and below, the sharp barbs protrude into the subcortical bone of the vertebral body thus securing the cage in place. Multiple holes or fenestrations are present on the superior and inferior surfaces of the cage to permit contact of morselized autologous bone and/or an artificial bone matrix material with the prepared endplate surface.
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