Protek Ag

Spinesave Ag

Sulzer Brothers Limited

Sulzer Orthopaedie Ag

Biedermann Technologies Gmbh & Co. Kg

Spinelab Ag

Bird Biedermann Ag

Sulzer Medizinaltechnik Ag

Spinelab Gmbh

Biedermann, Motech Gmbh

Stefan Freudiger

Walter Baumgartner

Rudolf Koch

Hans Fluckiger

Jean-Louis Husson

Lutz Biedermann

Wilfried Matthis

Rolf Diener

Roland P Jakob

For a differentiated treatment of individual motion segments of the spine, a plastic rod () for the dynamic stabilization of the spine has different degrees of stiffness in its longitudinal direction. The different rod segments are interconnected along an oblique plane ().

Elastic rod having different degrees of stiffness for the surgical treatment of the spine

A connection element () for stabilizing vertebral bodies that has a variable stiffness along its longitudinal axis in that particularly the cross-section of the connecting element varies along its longitudinal axis and extends over a plurality of bone screws (). In spite of the varying cross-section (h, h), in a preferred embodiment, the same bone screws () may be used in all locations by inserting clamping elements () of different lengths.

Spinal implant set for the dynamic stabilization of the spine

Plastic rod anchorage for the surgical treatment of the spine where the plastic rod () has at least two plane-parallel surfaces () in order to uniformly clamp the rod () on its entire circumference.

Anchorage arrangement for a connecting rod for the stabilization of the spine

Spinal implant comprising a quick closure () for securing a connecting element () in a bone screw () where the quick closure () is rotatively attachable in the clockwise or counterclockwise direction and lockable such as to be able to take up torques applied to the bone screw () while preserving the bone anchorage from manipulative stress.

Spinal implant set including a quick closure

A Spinal column implant for elastic stabilization of vertebrae includes an elastic rod that is anchored in a non-positive fit fashion in the receptacle of a pedicle screws by means of a mobile filling piece and a clamping element. The non-positive fit is supported additionally by a dynamic form-fit contribution upon exposure to load.

Dynamic clamping device for spinal implant

A bone anchoring device is provided that includes an anchoring element with a shank to be anchored in a bone or a vertebra, a connection element for connecting at least two anchoring elements, the connection element being made of an elastic material, a receiving part being connected to the shank for receiving the connection element and connecting the connection element to the shank, a seat for the connection element the seat being provided in the receiving part, and a locking element being engageable with the receiving part for fixation of the connection element in the seat. At least the portion of the connection element which is received in the recess has a substantially smooth-surface. The locking element has an engagement structure which contacts the surface of the connection element in such a way that a form-fit connection is provided.

Bone anchoring device

A vertebral column implant for the elastic stabilization of motion segments including an elastically bendable connecting element which can be passed through the seats of a number of pedicle screws having offset seat axes and be anchored. The connecting element is bendable elastically about every axis of its cross-section in such a way that the connecting element can be passed through, or inserted in, the seats of the screwheads, one behind the other, even when the seats are not situated on one and the same axis.

Elastic stabilization system for vertebral columns

A spinal column implant for elastic stabilization of vertebrae, includes a pedicle screw and an elastic rod which is anchored in a frictional fashion in a receptacle of pedicle screws by means of a filling piece, and a clamping element. The frictional connection is supported additionally by an indirect form-fit portion.

Frictional screw-rod connection having an indirect form-locking portion

A bone anchoring device includes an anchoring element having a shank to be anchored in a bone or a vertebra, a rod for connecting at least two anchoring elements, the rod being made of an elastic material. The bone anchoring device further includes a receiving part being connected to the shank for receiving the rod, a seat for the rod being provided in the receiving part the seat having a rod contacting surface, and a locking device cooperating with the receiving part for fixation of the rod in the seat. The locking device includes a rod contacting surface, wherein the rod contacting surface of the seat and/or the rod contacting surface of the locking device includes an engagement structure for engaging the rod, the engagement structure having an asymmetric cross section.

A pedicle screw with a closure device including a seat element and a closure cap for quick closure of the seat element of the pedicle screw. An elastic rod element inserted therein in the seat recess, which element serves to stabilize a vertebral column, is held in a form-locking way. The closure cap of the closure device has the function of a cross-brace, and can transfer the forces absorbed by it from the rod element to the pedicle screw. Disposed on the closure cap with a holding recess are engagement elements which, during insertion of the closure cap, automatically lock in place in a stable position in the seat element provided with a U-shaped seat recess. The seat recess and the holding recess preferably have a ridged or grooved structure corresponding to the rod element used.

Pedicle screw with a closure device for the fixing of elastic rod elements

A vertebral column implant for the elastic stabilization of motion segments () comprising an elastically bendable connecting element () which can be passed through the seats () of a number of pedicle screws () having offset seat axes () and be anchored. The connecting element is bendable elastically about every axis of its cross-section in such a way that the connecting element can be passed through, or inserted in, the seats of the screwheads, one behind the other, even when the seats are not situated on one and the same axis. The connecting element and the seat in the screwhead each have wholly, or in part, a structured surface, in such a way that the structured surface of the seat engages the structured surface of the connecting element, and shifting can be prevented in assembled condition.

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.

Intervertebral prosthesis

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.

The invention discloses a fastening system for pedicel screws anchorable in different vertebrae. The spherical screw heads lie in spherical shells of apertured counter-bodies. The counter-bodies have planar support surfaces which lie on a supporting link in the region of elongate holes. A screw element is provided in the axial direction of each pedicel screw and is pivotably journalled at the supporting link with a spherical support surface arranged in the region of the elongate hole. The pedicel screws are generally skewed relative to one another and can, when account is taken of the nature of the bone, be rigidly connected to the supporting links via the screw elements due to the fact that the support surfaces can be clamped against one another in a self-locking manner on pedicel screws which are positioned inclined relative to the support surfaces.

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Bremgarten, Switzerland

Stefan Freudiger