Abstract: Disclosed is an intervertebral cage for arthrodesis, where at least part of an upper and/or lower contact zone is made of a porous titanium material with a thickness of at least 1 mm and with a porosity of between 50% and 90%, where the diameter of the pores (DP) is between 200 ?m and 1 mm, and where the pores have an aperiodic distribution.

Abstract: Prosthesis holder (1) made of a radiolucent material for a disc prosthesis (2) constituted by at least two parts which are mobile in relation to each another, including, on one side an element (9) for coupling to a sleeve and on the other side, an element for reversible coupling to a disc prosthesis, the reversible coupling element is arranged in order to allow decoupling, by simple traction exerted perpendicularly to a spinal column when the disc prosthesis has been correctly impacted between two vertebrae and the retention force of the reversible coupling element on the disc prosthesis is adjusted so as not to allow decoupling by simple traction when the disc prosthesis has not been correctly impacted, and an assembly including a prosthesis holder and a disc prosthesis.

Abstract: A bone clamping system includes a shaft (3), a first plate (1) integrally attached to the shaft and a second, movable plate (20), wherein a locking leaf (22, 23), penetrating into the shaft (3) or not, locks the second plate (20) on the shaft (3).

Abstract: Intervertebral disc prosthesis includes an upper plateau (16) with an outer surface (16a) bearing on an upper vertebra and with a surface (16b) directed towards the inside of the prosthesis, a lower plateau (18) with an outer surface (18a) bearing on a lower vertebra and with a surface (18b) directed towards the inside of the prosthesis, and a ball-type joint between the upper plateau and the lower plateau, having a bulged convex element (27), cooperating with a complementary recess of the bulged convex element (27) and coming into contact with the bulged convex element (27), the bulged convex element (27) including at least one slot (24, 25, 26, 28) that allows it to deform.

Abstract: A vertebroplastic cementitious composition includes a solid phase including Portland cement and a biocompatible additive which is a plasticizer and a hardening accelerant, wherein the amount of additive is between about 1% and about 15% by weight relative to the Portland cement; and an aqueous liquid phase, wherein the ratio of the solid phase to the liquid phase is between about 3 g/ml and about 6 g/ml. Methods of forming such compositions, treatment methods using such compositions and cementitious implants including such compositions are also described.

Abstract: A synthetic bone substitute, includes a mixture of osteoconductive particles of first and second average particle sizes, suspended in a water-soluble reverse-phase hydrogel carrier in which the first average particle size is less than about 100 ?m, and the second average particle size is about 100-500 ?m. A method of producing the same is also described.

Abstract: A system for gripping spinous processes, includes a first plate (1) and a second plate (20), which are installed face to face, and a shaft (3), which is installed approximately perpendicularly with respect to the two plates and passes at least partially through one of them, the plates including an inner face and an outer face, a surface of the inner face of the plates is provided with raised roughening features (6), the first plate is movable relative to the second plate, the first plate is fixed in translation with respect to the shaft, and the shaft and the second plate form a non-return pawl mechanism including a series of notches that cooperate with the non-return pawl mechanism such that the movement of the plates toward each other is irreversible without external aid, whereby spinous processes can be effectively gripped between the two plates.

Abstract: A pedicle perforator (1) includes a handle (2) and a shaft (3) which ends opposite the handle (2) with an end (4) that has a perforated shape (hereinafter referred to as “tip”), characterized in that the shaft (3) includes a protruding centering device (7) for a cylindrical surface, provided in a region of the shaft (3) opposite the handle (2), a hollow guide tube (11) having an internal diameter of 4 to 20 mm, an external diameter of 5 to 22 mm and a length of 4 to 25 cm, including an end that has reliefs for attachment (12), for use together with the pedicle perforator, and a set including a pedicle perforator (1) and a hollow guide tube (11), wherein the pedicle perforator (1) can slide loosely in this hollow guide tube.

Abstract: The invention relates to an intervertebral disc prosthesis having an upper plate, a lower plate having an essentially-flat support surface, and an intermediate element having a base which is equipped with a rim and which is topped with a spherical cap. The upper plate and the cap define a ball and socket joint therebetween. The base of the intermediate element comes into contact with a support surface of the lower plate. The lower plate is equipped with a guide having two edges which maintain the intermediate element therebetween. The rim of the base comes into contact with the edges, the rim being circular in shape and adapted to enable the intermediate element to roll along the length of the edges.

Abstract: A bridging device for laminoplasty includes a bridge (5) and two attachment arms (7), each attachment arm (7) including a tab ending in a tip and provided with backstop asperities (8), wherein at least one of the attachment arms (7) further includes a blocking device (9) for a cervical blade (2) for clamping the cervical blade (2) between the tab (7) and the blocking device (9), the backstop asperities (8) being provided between the tab (7) and the blocking device (9).

Abstract: A lumbar plate, which can be implanted by a posterior approach in order to partially immobilize adjacent vertebrae, includes two holes (13) which are spaced apart and through which screws (2) can be introduced into adjacent lumbar vertebrae, the lumbar plate (12) including, between the two holes (13), an extensible and compressible zone made of elastic material.

Abstract: Prosthesis holder (1) made of a radiolucent material for a disc prosthesis (2) constituted by at least two parts which are mobile in relation to each another, including, on one side an element (9) for coupling to a sleeve and on the other side, an element for reversible coupling to a disc prosthesis, the reversible coupling element is arranged in order to allow decoupling, by simple traction exerted perpendicularly to a spinal column when the disc prosthesis has been correctly impacted between two vertebrae and the retention force of the reversible coupling element on the disc prosthesis is adjusted so as not to allow decoupling by simple traction when the disc prosthesis has not been correctly impacted, and an assembly including a prosthesis holder and a disc prosthesis.

Abstract: A lumbar inter-spine prosthesis includes a torsion spring with two branches (3, 4) each end of which includes a fixation system (5) for attachment to the apophysis (1) of a vertebra (2).

Abstract: Intervertebral disc prosthesis includes an upper plateau (16) with an outer surface (16a) bearing on an upper vertebra and with a surface (16b) directed towards the inside of the prosthesis, a lower plateau (18) with an outer surface (18a) bearing on a lower vertebra and with a surface (18b) directed towards the inside of the prosthesis, and a ball-type joint between the upper plateau and the lower plateau, having a bulged convex element (27), cooperating with a complementary recess of the bulged convex element (27) and coming into contact with the bulged convex element (27), the bulged convex element (27) including at least one slot (24, 25, 26, 28) that allows it to deform.

Abstract: The invention relates to an intervertebral disc prosthesis consisting of: an upper plate, a lower plate having an essentially-flat support surface, and an intermediate element comprising a base which is equipped with a rim and which is topped with a spherical cap. The upper plate and the cap define a ball and socket joint therebetween. The base of the intermediate element comes into contact with the support surfaces, while the lower plate is equipped with a guide comprising two edges which maintain the intermediate element therebetween.