Patent ID: 6214050
Filing Date: 2001-04-10
Classification: A61F

Abstract:
An expandable intervertebral implant comprising:an anchor structure adapted to be inserted at least partially into vertebrae or between two vertebrae, and adapted to be secured thereto by expansion, said anchor structure having interiorly disposed surfaces and a plurality of radially movable fingers extending axially along said intervertebral implant;a moveable structure having interiorly disposed surfaces and exteriorly disposed surfaces, said exteriorly disposed surfaces engageable with vertebrae, said movable structure being operatively connected to said anchor structure so that movement of said movable structure with respect to said anchor structure causes expansion of the implant and at least partial extrusion of material contained within the implant;said anchor structure cooperating with said movable structure and defining a cavity delimited by said interiorly disposed surfaces of said anchor structure, said interiorly disposed surfaces of said movable structure, and said plurality of fingers; andat least one of said anchor structure and movable structure having an extrusion opening through which said at least partial extrusion of material in said cavity occurs.