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 disclosure relates to a device for establishing an anatomical reference point of an intervertebral disc for the attachment of at least one instrument Intended for the implantation, through a posterior or posterolateral approach, of a disc prosthesis or osteosynthesis cage as a replacement for the intervertebral disc. The device includes at least two means for bone anchorage each intended to be attached to a vertebra adjacent to the disc, a coupling element for the instrument and elements for adjusting the position of the coupling element relative to the position of the disc.

Abstract: The disclosure relates to a device for establishing an anatomical reference point of an intervertebral disc for the attachment of at least one instrument Intended for the implantation, through a posterior or posterolateral approach, of a disc prosthesis or osteosynthesis cage as a replacement for the intervertebral disc. The device includes at least two means for bone anchorage each intended to be attached to a vertebra adjacent to the disc, a coupling element for the instrument and elements for adjusting the position of the coupling element relative to the position of the disc.

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: The present invention relates to a vertebral osteosynthesis plate to maintain relative vertebral orientation correction using a correction instrument. The osteosynthesis plate has an overall rectangular shape and comprises at least four slots to insert, in each, fixation devices, wherein at least two of the slots opens onto a lateral edge of the osteosynthesis plate to enable positioning and fixation of the plate with no prior removal of the relative vertebral orientation correction instrument. The edge of the plate is defined by an edge located in the same direction as the longitudinal direction of the plate. The longitudinal direction of the plate is roughly identical to that of the direction of the spinal column.

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 connecting assembly for spinal osteosynthesis has a bone anchoring element including a connection zone designed to co-operate with a connecting device. The connecting device comprises in its lower part a spherical shape designed to enable the connecting device to be freely positioned in a connector or in a linking element having a cavity with matching shape, the spherical shape forming a stop element for longitudinal positioning with the connector or with the linking element.

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: A connection assembly for spinal osteosynthesis has a bone-anchor having a connection zone intended to cooperate with a connection device, in which the connection device has, in its lower part, a spherical shape in order to permit a free positioning of the connection device in connector. The connector has a cavity of complementary shape to the spherical shape. This spherical shape forms a limit of longitudinal positioning with the connector.

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: A device to monitor penetration of an instrument in an anatomical structure including at least two electrodes, a source of current supplying the at least two electrodes, and means for measuring impedance between the electrodes, wherein the electrodes are located on the penetration instrument, wherein the first electrode has a contact surface coinciding with a distal surface of the penetration instrument and the second electrode has a contact surface coinciding with a lateral surface of the penetration instrument, and wherein the contact surfaces are dimensioned to have a coinciding and constant contact surface as a function of a degree of penetration of the penetration instrument in the anatomical structure.

Abstract: The disclosure relates an implant for placement in an anatomical structure including at least two electrodes separated by an insulator, the electrodes being flush with the surface of the implant to allow the implant to be followed up and guided during insertion in the anatomical structure.

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: A connector for an osteosynthesis system is intended to provide a connection between a rigid correction rod of circular cross section and a transverse connection element of a spinal osteosynthesis system. The connector comprises a hook having a first semicylindrical seat oriented substantially along a first axis to receive the correction rod in a sliding manner. The connector also having a second seat having an axis substantially perpendicular to the first axis. The second seat opening into the first seat to receive a substantially spherical end of a transverse rod of the transverse connection element. The second seat comprises a tapped hole with an axis oriented substantially perpendicular to the axis of the second seat in order to receive a clamping screw which will exert pressure on the spherical end of the transverse rod, the spherical end coming to bear on the correction rod.

Abstract: The invention concerns an osteosynthesis system, comprising at least a linking element in the form of a rod, at least two fixing elements each capable of being anchored in a vertebra, and a locking screw. The invention is characterized in that the base of the head has a general horse-saddle shape, and the head has guide means for an independent closure component designed to be fixed on the head after the linking element has been positioned in the fork of the head, said closure component being generally U-shaped whereof the branches are urged to co-operate with the branches of-the fork-shaped part of the head and whereof the base comprises an internal thread for co-operating with the locking screw and the guide means provided on the head is formed by an arc-shaped shoulder on the outer side surfaces of the fork-shaped part. The invention also concerns an ancillary and an element for fixing such a system.

Abstract: The present invention concerns a method and equipment for drilling bone, in particular for setting a pedicle screw using a manual or motorized drilling tool. The equipment includes a drilling instrument, a source of electric impulses and a connector for connecting the electric impulse source to the drilling instrument. The equipment includes at least one sensor for detecting a muscle signal either implanted in a muscle or placed on the skin in the vicinity of a muscle before and during drilling. An alert is produced in the event of detection by at least one sensor of a muscle signal correlated with the source of electric impulses connected to the drilling instrument.