| 主权项 |
1. An expandable interbody fusion device for implantation into an intradiscal space between two opposing vertebral bodies of a spine, comprising:
a superior endplate having an outer surface configured to contact one of said vertebral bodies, said outer surface including at least two generally opposite spaced edges, said outer surface defining an anatomic correction surface being inclined downwardly away from a location proximate one of said edges defining a higher edge toward a location proximate the other of said edges defining a lower edge; and an inferior endplate having opposing spaced apart sidewalls and opposing spaced apart distal and proximal endwalls defining therewithin an open interior cavity, said sidewalls, said distal and proximal endwalls each having an upper surface that jointly define an upper surface of said inferior endplate, said superior endplate being received within said interior cavity such that in an unexpanded condition said outer surface of said superior endplate defining said anatomic correction surface lies fully nested within the bounds of said cavity with at least said lower edge being entirely recessed within said cavity below the upper surface of said inferior endplate, said superior endplate being movable in a direction of expansion relative to said inferior endplate toward said one vertebral body such that upon expansion at least the higher edge of said outer surface of said superior endplate projects outwardly above the upper surface of said inferior endplate. |
