Abstract: Intervertebral disk prosthesis comprising an external waterproof multilayered deformable casing surrounding a peripheral partition membrane delimiting an outer space and an inner cavity, wherein the inner cavity is partitioned by vertical walls delimiting at least four cavity compartments configured to be filled with a non-toxic saline solution, and wherein the vertical walls comprise orifices and/or porous membranes configured to induce the saline solution to flow from one cavity compartment toward another upon heterogeneous application of a pressure comprised between 0.05 and 3 MPa in a duration comprised between 10 seconds and 60 minutes, and to revert back to its native compartment upon removal of said pressure in a duration comprised between 10 seconds and 180 minutes, and wherein the walls are distributed asymmetrically in the inner cavity so that a posterior part of the inner cavity comprises fewer and/or larger cavity compartments than an anterior part of the inner cavity.

Abstract: A locator-pin for positioning a pedicle screw in a bone, comprising a pin body, a distal portion comprising a trocar tip shaped to penetrate a bone by pressing and/or percussing and a proximal portion equipped with a first fixing member to fix, during use, to an insertion pin-carrier and a second fixing member to fix, during use, to a removal pin-carrier, the two fixing members being different, wherein the first fixing member is able to transmit at least an axial push parallel to an axis of a locator-pin, and the second fixing member is able to transmit at least an axial draw parallel to the axis of the locator-pin and at least one sense of rotation around the axis of the locator-pin. Systems comprising the locator-pin and methods of recovering a positioned locator-pin.

Abstract: Instruments and methods for preparing an intervertebral space for receiving an implant. An adjustable trial implant has an adjustable stop mechanism having a stop member connected thereto to vary the distance that a body portion of the trial implant can move into the intervertebral space. Cutting tools for forming cutouts in the adjacent vertebrae use the trial implant and/or a guide to position a cutting tool which may be a burr or a chisel. The chisel cutting tool can be moveable relative to a selected trial implant or the chisel cutting tools can be fixed onto a trial implant shaped body portion.

Abstract: This invention proposes a system (100) for the insertion and removal of a so-called “locator” pin (110) for very precisely positioning a pedicle screw (170) in a bone (O), enabling the implementation of an affordable and safe procedure that reduces exposure to surgery.

Abstract: An intervertebral implant, alone and in combination with an insertion tool for inserting same and a method for inserting same. The implant has upper and lower parts which have universal movement relative to each other. Each of the upper and lower parts also has a surface engaging an adjacent vertebrae. Each part has a keel extending from said surface into a cutout in the adjacent vertebrae, and each keel has an anterior opening recess therein. An insert tool has a pair of arms which are received in the recess of the keels through the anterior opening to securely hold and insert the implant. Projections and matching indentations in each arm and the base of its recess securely attached each arm within its keel.

Abstract: An intervertebral implant, alone and in combination with an insertion tool for inserting same and a method for inserting same. The implant has upper and lower parts which have universal movement relative to each other. Each of the upper and lower parts also has a surface engaging an adjacent vertebrae. Each part has a keel extending from said surface into a cutout in the adjacent vertebrae, and each keel has an anterior opening recess therein. An insert tool has a pair of arms which are received in the recess of the keels through the anterior opening to securely hold and insert the implant. Projections and matching indentations in each arm and the base of its recess securely attached each arm within its keel.

Abstract: An intervertebral spinal implant, for insertion between two consecutive vertebral bodies, includes a volume, inclined first and second through-holes formed in the volume, and elongated first and second fastening elements for securing the volume. The first and second through-holes have respective ends that open onto a front face and onto lower and upper faces of the volume, respectively. The first fastening element extends through the first through-hole and is implanted in the vertebral body adjacent to the lower face. The second fastening element extends through the second through-hole and is implanted in the vertebral body adjacent to the upper face. The through-holes intersect such that one of the fastening elements secures the other fastening element, once the fastening elements are respectively in place in the through-holes.

Abstract: An intervertebral implant, alone and in combination with an insertion tool for inserting same and a method for inserting same. The implant has upper and lower parts which have universal movement relative to each other. Each of the upper and lower parts also has a surface engaging an adjacent vertebrae. Each part has a keel extending from said surface into a cutout in the adjacent vertebrae, and each keel has an anterior opening recess therein. An insert tool has a pair of arms which are received in the recess of the keels through the anterior opening to securely hold and insert the implant. Projections and matching indentations in each arm and the base of its recess securely attached each arm within its keel.

Abstract: An intervertebral implant comprises first and second parts having outer surfaces engaging adjacent vertebral surfaces. An insert between these parts provides relative movement therebetween. The first and/or second parts may have engagement means in the form of apertures for engagement with insertion instruments. The first and second parts may nest together, in the absence of the insert, for insertion into the intervertebral space. The boundaries of the implant may form a working space which would include insertion instruments therein. A detent and detent recess may be provided for engagement of the insert and one of said first and second parts.

Abstract: The invention relates to the preparation of an intervertebral space with a trial implant (9), the insertion of an implant (5, 6, 7), the inserters (13, 16), and the method for feeding and inserting the implant (5, 6, 7) by means of an oblique anterior approach. In the novel improved method, the associated instruments (13, 16) for inserting an implant (5, 6, 7) into an intervertebral space, in particular for the lumbar spine at an oblique anterior angle of 45° was developed, the left side of the body being preferred for insertion of the implant (5, 6, 7). Either the implant (5, 6, 7) can be inserted all in one, or first the upper part (5) and lower parts (7) and then the inlay (6) may be inserted. By insertion by means of the left oblique anterior approach at 45°, optimum utilization of the area of the intervertebral space is ensured (footprint), and better retention of the implant is guaranteed by the exact chiselling at an angle of 90° normal to the respective intervertebral surface.

Abstract: An intervertebral implant, alone and in combination with an insertion tool for inserting same and a method for inserting same. The implant has upper and lower parts which have universal movement relative to each other. Each of the upper and lower parts also has a surface engaging an adjacent vertebrae. Each part has a keel extending from said surface into a cutout in the adjacent vertebrae, and each keel has an anterior opening recess therein. An insert tool has a pair of arms which are received in the recess of the keels through the anterior opening to securely hold and insert the implant. Projections and matching indentations in each arm and the base of its recess securely attached each arm within its keel.

Abstract: An intervertebral implant, alone and in combination with an insertion tool for inserting same and a method for inserting same. The implant has upper and lower parts which have universal movement relative to each other. Each of the upper and lower parts also has a surface engaging an adjacent vertebrae. Each part has a keel extending from said surface into a cutout in the adjacent vertebrae, and each keel has an anterior opening recess therein. An insert tool has a pair of arms which are received in the recess of the keels through the anterior opening to securely hold and insert the implant. Projections and matching indentations in each arm and the base of its recess securely attached each arm within its keel.

Abstract: An intervertebral implant comprises first and second parts having outer surfaces engaging adjacent vertebral surfaces. An insert between these parts provides relative movement therebetween. The first and/or second parts may have engagement means in the form of apertures for engagement with insertion instruments. The first and second parts may nest together, in the absence of the insert, for insertion into the intervertebral space. The boundaries of the implant may form a working space which would include insertion instruments therein. A detent and detent recess may be provided for engagement of the insert and one of said first and second parts.

Abstract: An intervertebral implant comprises first and second parts having outer surfaces engaging adjacent vertebral surfaces. An insert between these parts provides relative movement therebetween. The first and/or second parts may have engagement means in the form of apertures for engagement with insertion instruments. The first and second parts may nest together, in the absence of the insert, for insertion into the intervertebral space. The boundaries of the implant may form a working space which would include insertion instruments therein. A detent and detent recess may be provided for engagement of the insert and one of said first and second parts.

Abstract: An intervertebral spinal implant, for insertion between two consecutive vertebral bodies, includes a volume, inclined first and second through-holes formed in the volume, and elongated first and second fastening elements for securing the volume. The first and second through-holes have respective ends that open onto a front face and onto lower and upper faces of the volume, respectively. The first fastening element extends through the first through-hole and is implanted in the vertebral body adjacent to the lower face. The second fastening element extends through the second through-hole and is implanted in the vertebral body adjacent to the upper face. The through-holes intersect such that one of the fastening elements secures the other fastening element, once the fastening elements are respectively in place in the through-holes.

Abstract: In an intervertebral implant, having an upper part that has a support face for a vertebra and a lower part that has a support face for an adjacent vertebra, on each of which parts engagement elements, which are accessible from one side of the intervertebral implant, for a manipulation instrument are disposed, in order to minimize the structural height of the intervertebral implant upon insertion into an intervertebral space, it is proposed that the upper part and lower part each have protrusions and recesses aimed at the respectively other part, which are offset laterally from one another in such a way that when the upper part has been brought close to the lower part they mesh with one another; and that the engagement elements on the upper part and on the lower part are each disposed in protrusions of these parts in such a way that the engagement elements of the upper part and lower part are located side by side and at least partly overlap in the direction of the height of the intervertebral implant.

Abstract: In an insertion instrument for a three-piece intervertebral implant that includes an upper part that can be placed against a vertebra, a lower part that can be placed against the adjacent vertebra, and a pivot element that can be inserted between these two parts, the instrument having two arms, disposed side by side and supported pivotably relative to one another on one end, which at their free ends each have one retention device for the upper part and lower part, respectively, of the intervertebral implant, it is proposed that a longitudinal guide for the pivot element is disposed in one of the arms.

Abstract: In an intervertebral implant, having an upper part that has a support face for a vertebra and a lower part that has a support face for an adjacent vertebra, on each of which parts engagement elements, which are accessible from one side of the intervertebral implant, for a manipulation instrument are disposed, in order to minimize the structural height of the intervertebral implant upon insertion into an intervertebral space, it is proposed that the upper part and lower part each have protrusions and recesses aimed at the respectively other part, which are offset laterally from one another in such a way that when the upper part has been brought close to the lower part they mesh with one another; and that the engagement elements on the upper part and on the lower part are each disposed in protrusions of these parts in such a way that the engagement elements of the upper part and lower part are located side by side and at least partly overlap in the direction of the height of the intervertebral implant.

Abstract: Instruments and methods for preparing an intervertebral space for receiving an implant. An adjustable trial implant has an adjustable stop mechanism having a stop member connected thereto to vary the distance that a body portion of the trial implant can move into the intervertebral space. Cutting tools for forming cutouts in the adjacent vertebrae use the trial implant and/or a guide to position a cutting tool which may be a burr or a chisel. The chisel cutting tool can be moveable relative to a selected trial implant or the chisel cutting tools can be fixed onto a trial implant shaped body portion.

Abstract: An intervertebral implant, alone and in combination with an insertion tool for inserting same and a method for inserting same. The implant has upper and lower parts which have universal movement relative to each other. Each of the upper and lower parts also has a surface engaging an adjacent vertebrae. Each part has a keel extending from said surface into a cutout in the adjacent vertebrae, and each keel has an anterior opening recess therein. An insert tool has a pair of arms which are received in the recess of the keels through the anterior opening to securely hold and insert the implant. Projections and matching indentations in each arm and the base of its recess securely attached each arm within its keel.