Devices and methods for preventing the migration or expulsion of a nucleus disc replacement implant are provided. In one embodiment, an anti-expulsion device includes a body that is movable between a compressed configuration where it is adapted to fit through an opening in an annulus of a spinal disc, and an expanded configuration where it has a size that is larger than a size of the opening in the annulus of a spinal disc. The body can also include one or more mating features that allow the body to interact with a nucleus disc replacement implant and/or an annular wall of an annulus. As a result, since the body is larger than the opening of the annulus in the expanded configuration, the interlocking connection between the body and the nucleus disc replacement implant and/or annular wall will allow the body to prevent the nucleus disc replacement implant from being expulsed from the opening in the annulus.
申请公布号
WO2008039281(A3)
申请公布日期
2008.08.21
申请号
WO2007US18451
申请日期
2007.08.21
申请人
DEPUY SPINE, INC.;MASTRORIO, BROOKE, W.;HALL, MARK, T.;STAD, SHAWN, D.
发明人
MASTRORIO, BROOKE, W.;HALL, MARK, T.;STAD, SHAWN, D.