Abstract: The invention relates to a surgical assembly which comprises: a cap (2) comprising an outer thread (2c) and a central recess for inserting a screw bit; a cap-holder in the form of a hollow sleeve (10) comprising a connection end (11) for connecting with the cap (2), and a locking pin (15) slidably mounted in the hollow sleeve (10) between a neutral position and a locking position of the cap; the cap (2) comprises at least two diametrically opposed radial notches (7), arranged away from an outer side wall of said cap (2), each of the notches (7) comprising at least one side groove (8); the connection end (11) is extended longitudinally by two diametrically opposed lugs (12) capable of being inserted into the notches (7) and each including a side shoulder (12a) which complements the groove (8) of the notch (7) capable of being inserted into said groove in order to lock the sleeve (10) axially onto the cap.

Abstract: The surgical assembly includes: a bone anchorage screw having an anchorage portion for anchoring in a vertebral column, and a head in the form of a socket; and an extension device adapted to fit over the socket of the bone anchorage screw for forming a longitudinal extension thereto. The extension device includes a first tubular element referred to as an “inner tube”, of inside diameter greater than or equal to the inside diameter of the socket of the bone anchorage screw, and extended longitudinally by two diametrically opposite branches, forming jaws for clamping onto the outside surface of the socket so as to lock onto the socket, and a second tubular element referred to as an “outer tube”, mounted to slide along said inner tube.

Abstract: The surgical assembly includes: a bone anchorage screw having an anchorage portion for anchoring in a vertebral column, and a head in the form of a socket; and an extension device adapted to fit over the socket of the bone anchorage screw for forming a longitudinal extension thereto. The extension device includes a first tubular element referred to as an “inner tube”, of inside diameter greater than or equal to the inside diameter of the socket of the bone anchorage screw, and extended longitudinally by two diametrically opposite branches, forming jaws for clamping onto the outside surface of the socket so as to lock onto the socket, and a second tubular element referred to as an “outer tube”, mounted to slide along said inner tube.

Abstract: The device includes tubular elements capable of being temporarily fastened at the level of pedicle screw heads arranged to be connected by an implantable curved rod, and at least one rod intended to be movably inserted into slots of each tubular element, to align them for the correction of the spinal column by translation, tilting, and rotation of the vertebrae in the three planes of space. Each tubular element is configured in such a way that it can be coupled with the outside of the pedicle screw heads. The rod forms an alignment and handling rod, being capable of acting, as it moves, on rings for simultaneously displacing the curved rod. Each ring is assembled with the ability to slide along the tubular element, and to be height-adjustable to compensate for dimensional deviations between the alignment and handling rod and the curved rod.

Abstract: Surgical device for correcting deformation of the spinal column includes tubular elements for temporary attachment at pedicle screw heads connected by a curved implantable rod, and rods engaged through the elements to align them corresponding to the correction. Each tubular element has two independent portions coupled to outside of the heads; one end of each part having fittings coupling the portions together. The rods comprise an alignment rod and a handling rod, arranged in openings delimited by the portions to move parallel to an axis of the elements. The handling rod acting, as displaced, to simultaneously displace the curved rod, previously engaged into the openings, towards the heads. The handling rod being removed and then coupled to the outside of the elements arranged in alignment to remove the alignment rod and engage, inside each element, a member actuating a nut for fastening the curved rod in each head.

Abstract: Surgical device for correcting deformation of the spinal column includes tubular elements for temporary attachment at pedicle screw heads connected by a curved implantable rod, and rods engaged through the elements to align them corresponding to the correction. Each tubular element has two independent portions coupled to outside of the heads; one end of each part having fittings coupling the portions together. The rods comprise an alignment rod and a handling rod, arranged in openings delimited by the portions to move parallel to an axis of the elements. The handling rod acting, as displaced, to simultaneously displace the curved rod, previously engaged into the openings, towards the heads. The handling rod being removed and then coupled to the outside of the elements arranged in alignment to remove the alignment rod and engage, inside each element, a member actuating a nut for fastening the curved rod in each head.

Abstract: An extra-discal device for intervertebral stabilization includes at least one rigid part connected to pedicle screws by an element. This rigid part comprises a cylindrical body, each end of which is firmly attached to the element which is flexible and deformable so as to be linked to a part of a corresponding pedicle screw with reduced play to obtain a limited range of multidirectional movement in the sagittal, horizontal and frontal planes, while limiting translational movement to the axis of the screw.

Abstract: An extra-discal device for intervertebral stabilization includes at least one rigid part connected to pedicle screws by an element. This rigid part comprises a cylindrical body, each end of which is firmly attached to the element which is flexible and deformable so as to be linked to a part of a corresponding pedicle screw with reduced play to obtain a limited range of multidirectional movement in the sagittal, horizontal and frontal planes, while limiting translational movement to the axis of the screw.

Abstract: The invention relates to a nucleus or inter-vertebral disc prosthesis that comprises at least two plates capable of movement relative to each other through at least one articulation interface defined by a female surface and a male surface each having an essentially spherical shape and essentially equal diameters. The two articulation surfaces are respectively intersected by surfaces that define between them a relative mobility space for the plates when the articulation surfaces are coapted; the surface intersecting the female surface being contained in the volume defined by an equatorial plane of said sphere except for said equatorial plane itself, the surface intersecting the male surface being planar or convex.