Abstract: The present invention relates to an intervertebral disc prosthesis (1) comprising at least three components, namely a first plate, called the upper plate (2), a second plate, called the lower plate (3), and a movable core (4) arranged between said plates (2, 3), characterized in that the movable core (4) comprises a concave upper surface (44) in congruent contact with the convex surface of the upper plate (2) and a convex lower surface (45) in congruent contact with the concave surface of the lower plate (3), each of said surfaces being defined by a distinct radius of curvature, the radius of curvature of the concave surface (44) of the core being less than that of its convex surface (45), the centres of said concave (44) and convex (45) surfaces being situated on the radial axis of symmetry of the central core and being placed on the same side of the prosthesis (1), namely that of the upper plate (2).

Abstract: The intervertebral disk prosthesis comprises first and second parts (2, 3) intended to be attached respectively to two adjacent vertebrae, an intermediate part (4) inserted between the first and second parts (2, 3) and comprising articular surfaces (9, 10) that cooperate with respective articular surfaces (6, 8) of the first and second parts (2, 3), and means (11, 12) for coupling the first part (2) and the intermediate part (4). The coupling means (11, 12) are arranged to leave the intermediate part (4) free relative to the first part (2) during a first phase of a tilting movement of the first part (2) relative to the second part (3), but to displace the intermediate part (4) toward an end (E2) of the prosthesis that is opposite to an end (E1) toward which the first part (2) is displaced by tilting relative to the second part (3), during a second phase of the tilting movement of the first part (2).

Abstract: In a device including an anterior plate for vertebral column support, there is at least one connecting sliding piece which is used to connect an anchoring screw to a securing rod. The securing rod is inserted into a cylindrical bearing and is fixed using a tightening device including a small clamp and a tightening screw. The connecting sliding piece includes at least one tip which extends away from the cylindrical bearing for the securing rod, in a direction which converges with the axis of the anchoring screw. In this way, the connecting sliding piece is provisionally fixed by pressing same against a vertebra, the anchoring screw is subsequently screwed in place and, finally, the securing rod is inserted laterally into the cylindrical bearing before being tightened using the small clamp and the tightening screw. The device is designed for anterior implantation on a vertebral column.

Abstract: The intervertebral disk prosthesis includes first and second parts that are intended to be attached respectively to two adjacent vertebrae, an intermediate part that is inserted between the first and second parts and that includes first articular surfaces that work with respective second articular surfaces of the first and second parts, and elements for coupling the first part and intermediate part. The coupling elements are arranged to leave the intermediate part free relative to the first part during a first phase of a tilting movement of the first part relative to second part, such that the intermediate part is displaced toward one end of the prosthesis that is opposite to an end toward which the first part is displaced by tilting relative to the second part and for entraining the intermediate part with the first part during a second phase of the tilting movement.

Abstract: A vertebral column support device is assembled by means of clamping. The device includes bone screw- or hook-type vertebrae anchoring elements, the elements consisting of a threaded cylindrical part (5) and a stop collar (7). A fixing nut (8) can be screwed on the threaded cylindrical part (5) in order to fix a connecting sliding piece (4) which is mounted on a securing rod (3) having a circular section. In order to insure that the rod (3) and the connecting sliding piece (4) are secure, the securing rod (3) is clamped in a transverse groove (17) in the connecting sliding piece (4) using a clamp screw (21) and a little clamp (22) which is mounted in the corner of the groove. In this way, the inventive device is more rigid and can better support the vertebrae and, moreover, the device can be positioned and adjusted much more easily.

Abstract: An intersomatic implant for insertion in the intervertebral space defined between two adjacent lumbar vertebrae, referred to as an overlying vertebra and an underlying vertebra, reestablishes the anatomical shape of the intervertebral space. The implant includes spacer ramps extending between anterior and posterior transverse walls so as to project above a transverse face for determining a relative spacing between the underlying and overlying vertebrae while the implant is being inserted into the intervertebral space. A profile is presented which is circumscribed inside the intervertebral space in which the implant is to be placed.

Abstract: In a device including an anterior plate for vertebral column support, there is at least one connecting sliding piece which is used to connect an anchoring screw to a securing rod. The securing rod is inserted into a cylindrical bearing and is fixed using a tightening device including a small clamp and a tightening screw. The connecting sliding piece includes at least one tip which extends away from the cylindrical bearing for the securing rod, in a direction which converges with the axis of the anchoring screw. In this way, the connecting sliding piece is provisionally fixed by pressing same against a vertebra, the anchoring screw is subsequently screwed in place and, finally, the securing rod is inserted laterally into the cylindrical bearing before being tightened using the small clamp and the tightening screw. The device is designed for anterior implantation on a vertebral column.

Abstract: An intervertebral implant includes an essentially tubular body which is made from a biocompatible solid material. The body includes a large inner cavity which is defined by upper and lower walls, lateral walls, a front wall, and a rear wall, the rear wall having a tapped axial hole. A replaceable compression plug, which can be adapted by screwing, is inserted into the hole, in order to compress a graft which is disposed in the inner cavity of the implant.

Abstract: The invention relates to a vertebral column support device which is assembled by means of clamping. According to the invention, the device includes bone screw- or hook-type vertebrae anchoring elements, the elements consisting of a threaded cylindrical part (5) and a stop collar (7). A fixing nut (8) can be screwed on the threaded cylindrical part (5) in order to fix a connecting sliding piece (4) which is mounted on a securing rod (3) having a circular section. In order to insure that the rod (3) and the connecting sliding piece (4) are secure, the securing rod (3) is clamped in a transverse groove (17) in the connecting sliding piece (4) using a clamp screw (21) and a little clamp (22) which is mounted in the corner of the groove. In this way, the inventive device is more rigid and can better support the vertebrae and, moreover, the device can be positioned and adjusted much more easily.

Abstract: The invention relates to an intersomatic implant for insertion in the intervertebral space defined between two adjacent lumbar vertebrae, referred to as an overlying vertebra and an underlying vertebra, in order to reestablish the anatomical shape of the intervertebral space.

Abstract: Intervertebral disc endoprosthesis with two prosthesis plates which are to be connected to the end plates of the relevant vertebrae, and with a prosthesis core which cooperates with at least one prosthesis plate via an articular surface permitting a rotational movement around the vertical axis, In order indeed to make possible a rotational movement around the vertical axis but to oppose this movement by a resistance, the articular surface forms curved arches of different average radius in the median section and in the frontal section. The radius of curvature in the sagittal section is expediently less than in the frontal section. To avoid excessive twisting it is possible to provide stops on the prosthesis plates and on the prosthesis core. These are designed, for example, as ribs and grooves which run in the median plane.

Abstract: A consolidation rod and plural members, such as pedicular screws and vertebral claws, have threaded sections extending from a head and fitted with a nut. A rigid fast connection between the rod and a member providing high adhesion is ensured by a fastener for clamping the rod owing to the screwing of the nut. The fastener comprises a first bore sliding on the rod, a slit opening into the first bore and narrowed by nut screwing, and a second bore passing through the slit and passed through by the threaded section. An indented plate, or a bar with threaded ends fitted with hooks transversely stabilizes two consolidation rods. A connector longitudinally stabilizes two consolidation rods.