Abstract: A polyaxial bone anchoring system comprises a bone anchoring member provided with a hemispherical head and a tubular barrel comprising a base traversed by an axial channel of which the cross-section is greater than the cross-section of the hemispherical head, the channel having, in the lower part, a frustoconical housing that widens in the direction opposite the hemispherical head and, upstream from the frustoconical housing, a transverse shoulder of which the inner cross-section is substantially equal to the cross-section of the hemispherical head, the system further comprising a conical split ring of which the outer surface matches the inner surface of the frustoconical housing and of which the minimum cross-section when idle is smaller than the nominal cross-section of the hemispherical head, said ring being made from a deformable material.

Abstract: A connecting element for a spinal fixing system that connects at least two implantable connection assemblies including a rod including a flexible part extended at one end at least by a rigid part, the flexible part including a cable at least partly surrounded by a polymer envelope, the cable including at least one elastic strand coaxial with the envelope.

Abstract: The invention relates to a system which is used to fix a part to a bone element. The invention is essentially characterized in that it consists of: at least one hole which is disposed in part; a rigid rod comprising a first end, the rod being wound into a spiral along a first helicoidal curve; and a device for rotating the rod around the axis of the first helicoidal curve, such that the first end of the rod moves alternatively inside and outside the bone element and, during the rotation thereof, the first end of the rod moves at least once into the opening. The invention is particularly suitable for fixing intervertebral disks or fusion cages to the vertebral bodies of two consecutive vertebrae.

Abstract: A dynamic stabilization member for the vertebrae, capable of interacting with at least two implantable connection assemblies is provided. Each connection assembly system including a system for anchoring into a vertebra and adapted for receiving the dynamic stabilization member, and a system for clamping the dynamic stabilization member (on the anchoring system), of the type that comprises a rod extending along a longitudinal axis and a cable provided with a casing made of an elastic material, characterized in that the cable comprises a fastening sheath surrounding the rod and including rigid areas spaced from each other.

Abstract: An intervertebral prosthesis includes at least one core which is positioned between an upper plate and a lower plate, the prosthesis also includes an outer casing. The aforementioned plates comprise respective inner faces which enable the core to move inside the prosthesis.

Abstract: A connecting device for spinal osteosynthesis has an osseous anchoring device, a connector that accommodates a joining shaft and is fixed to one end of the anchoring device, and a tightening device for immobilizing the joining shaft. The connecting device is characterized in that the connector is fixed to the anchoring device with the aid of a pin that penetrates the anchoring device and embodies a pivot joint. Furthermore, the device comprises an arrangement for stabilizing the connector relative to the anchoring device when the device is implanted in the patient, the stabilizing arrangement being located on the plane encompassing the shaft and the anchoring device.

Abstract: A linking element for a spinal fixing system is designed to link at least two implantable connecting assemblies. The linking element is formed at least partly of a support made of polymeric material and of two rods with a first rod, bent or not, substantially coaxial with the support, and a second rod formed of turns surrounding the first rod with the turns being at least partly embedded in the support. A spinal fixing system has at least two implantable connecting assemblies linked by at least one linking element.

Abstract: The invention concerns in particular an invertebral prosthetic disc nucleus (1) in the form of a flexible filament (5) of a biocompatible elastomer. The filling material is adapted for injecting by means of a hollow needle (4) into the cavity (2) of the annulus. The filament winds when contacted with the walls (6) and with its own segments so as to form an entanglement filling the cavity.

Abstract: The invention concerns an instrument for moving a vertebra (1) relative to another (2) comprising: a stem (3) consisting of a substantially horizontal crosspicce (5) and a first arm (4) whereof the lower end (15) has means (24) to be anchored to a first vertebra (2); and a second arm (6) whereof the lower end (10) has means (25) for being anchored to a second vertebra (1), and one upper end has a means (7) for actuating in translation said second arm (6) along a direction substantially perpendicular to the crosspiece (5), said actuating means being associated with the crosspiece (5). The second arm (6) is deformable along at least one degree of freedom between the lower end (10) of the second arm (6) and its actuating means (7).

Abstract: This invention relates to an ancillary for a spinal osteosynthesis system comprising at least one implant that will be implanted in a spine. The implant comprises accommodation means located approximately along a centerline and that will accommodate at least one rod type connecting element. The ancillary comprises holding means that will cooperate with the said implant, and a manipulation means free to move with respect to the said holding means that will be used to manipulate the said connecting element. The said holding means will be arranged on one side of the accommodation means, and the said manipulation means comprises attachment means that will cooperate with the said implant on the side of the centerline of the accommodation means opposite the accommodation means. This invention also relates to a process for implantation of a spinal osteosynthesis system comprising at least one implant, using an ancillary.