Intervertebral prosthesis
AssigneeSulzer Orthopaedie AG
InventorsJean-Louis Husson, Walter Baumgartner, Stefan Freudiger
Life of this patent
Estimating the term…
Abstract
An implant, in particular an intervertebral prosthesis, which consists of an elongated elastic body which is form-elastic and takes on the form of a spiral S in the force-free state. The spiral can be drawn by a reverse winding up into an insertion instrument which is only insubstantially larger in the insertion region than the cross-section of the elongated elastic body in order to reach the inner space of an intervertebral disc through a small opening in the annulus fibrosus and to push in and sever off the self-winding spiral when the interior is filled. This has the advantage that inner spaces of differing sizes can be filled with the same spiral.
Claims13
An intervertebral prosthesis for replacement of the nucleus of an intervertebral disc, the prosthesis having an elongated elastic body, which is form-elastic and which rolls up by itself into the form of at least one plane spiral in the force-free state, wherein the spiral has an approximately cylindrical middle piece at its center to which the form-elastic body is joined at the side via a transition member of small width, in order to produce a form-fitted spiral essentially without intervening spaces in the force-free state.
Dependencies are inferred from the claim text.