Abstract: A discontinuously double-threaded bone screw includes a drive head and anchoring body consisting of a cylindro-conical core over which extend at least two cylindro-conical threads, the anchoring body including anchoring portions of different profiles, ensuring an anchoring corresponding to different bone hardnesses and strengths, the anchoring body including, below the drive head, a first anchoring portion with a conical core and two threads with cylindrical profile and identical pitch, a second anchoring portion with a cylindrical core and a single cylindrical thread over ¼ turn, a third anchoring portion with a cylindrical core and two threads with cylindrical profile over ½ turn, a fourth anchoring portion including a cylindrical core and a single thread with cylindrical profile n turn based on total length of the bone screw, and a fifth anchoring portion including a conical core and two threads with conical profile forming the tip of the bone screw.

Abstract: A discontinuously double-threaded bone screw includes a drive head and anchoring body consisting of a cylindro-conical core over which extend at least two cylindro-conical threads, the anchoring body including anchoring portions of different profiles, ensuring an anchoring corresponding to different bone hardnesses and strengths, the anchoring body including, below the drive head, a first anchoring portion with a conical core and two threads with cylindrical profile and identical pitch, a second anchoring portion with a cylindrical core and a single cylindrical thread over ¼ turn, a third anchoring portion with a cylindrical core and two threads with cylindrical profile over ½ turn, a fourth anchoring portion including a cylindrical core and a single thread with cylindrical profile over n turn based on total length of the bone screw, and a fifth anchoring portion including a conical core and two threads with conical profile forming the tip of the bone screw.

Abstract: The immobilization device for a connecting rod (2) in an osseous anchoring element (3) of a rachidian implant (4) comprises an osseous anchoring implant (3) comprising retaining means (14, 15) adapted to deform elastically under a pressure force F and a blocking element (5) comprising on the one hand lugs (33, 34) which coact with the retaining means (14, 15) to permit the securement of the blocking element (5) on the osseous anchoring element (3), and on the other hand, a tightening screw (31) permitting immobilizing in rotation and in translation the connecting rod (2) between the osseous anchoring element (3) and the blocking element (5).

Abstract: A vertebral anchoring device including a polyaxial anchoring screw having a spherical head; a connecting rod; a connection element for receiving portions of the connecting rod; a clip having a pressure screw positionable to engage the connecting rod; and a connector installable on the spherical head for receiving the connecting rod. The connector includes a socket and a ring which co-act with one other about the spherical head of the screw in an installed orientation. The socket includes two portions bridged together at an upper level of the socket so that the two portions are positionable in a spaced apart orientation to enable the socket to be installed on the spherical head. Pressure of the pressure screw against the connecting rod bears the connecting rod against the ring which bears the ring against the spherical head of the screw.

Abstract: The invention relates to a fracture reduction instrument for an osseous body, extending between a distal end (2) and a proximal end, the distal end comprising at least one deformable element (5) suitable for passing from a relaxed position for positioning of the distal end inside the osseous body, to a deformed position for forming a cavity inside the osseous body, the deformable element being stressed by a shift mechanism (6) so that the deformable element may pass from one position to another and vice versa. According to the invention, the deformable element (5) is a blade whereof the two ends are provided with axes of rotation (7, 8) mounted freely in rotation between two assembly supports (9, 10) whereof at least one is stressed by the shift mechanism (6) to be mobile in translation so as to bring together the ends of the blade (5) by rotation of said ends.

Abstract: A surgical instrument for removal of an immobilizing element includes a main body having a guide tube integral with a fixed handle and having elastic elements for securing the surgical instrument on the head, a locking tube sliding on the guide tube and having elements for immobilizing the surgical instrument on the head, a pusher tube sliding inside the guide tube by way of a mobile handle connected to the fixed handle. The pusher tube has first elements for spacing apart the walls of the head and second elements for immobilizing the connection rod in the base of the head of the bone-anchoring element, and a gripper rod sliding inside the pusher tube and including a gripper device for securing and removal of the immobilizing element from the head of the bone-anchoring element.

Abstract: The surgical instrument according to the present invention comprises a main body (101) comprising a horizontal tube (102) extending by a frame (103) that is formed as an integral unit with a fixed handle (104), a movable handle (105) acting on a driving device (108) guided within the frame (103) and allowing, according to the pressure force applied on the movable handle (105), firstly the immobilization of the surgical instrument (100) on the head (8) of the bone anchoring element (2) and secondly the introduction under the pushing force F of an immobilizing element (104), previously positioned and guided within the tube (102), in the head (8) of the bone anchoring element (2).

Abstract: The intersomatic cage includes a body with a curved profile having at each end on the one hand recesses (8, 9) provided over all the height of the cage, and on the other hand in a direction perpendicular to the direction of the recesses (8, 9) a horizontal notch (14) opening into each recess (8, 9) and permitting temporarily connecting the intersomatic cage to a rod (19) of a cage carrying device (15) ensuring freedom of progressive angular rotation of the cage (1) as a function of its position of introduction between the vertebral bodies (26).

Abstract: The immobilization device for a connecting rod (2) in an osseous anchoring element (3) of a rachidian implant (4) comprises an osseous anchoring implant (3) comprising retaining means (14, 15) adapted to deform elastically under a pressure force F and a blocking element (5) comprising on the one hand lugs (33, 34) which coact with the retaining means (14, 15) to permit the securement of the blocking element (5) on the osseous anchoring element (3), and on the other hand, a tightening screw (31) permitting immobilizing in rotation and in translation the connecting rod (2) between the osseous anchoring element (3) and the blocking element (5).

Abstract: The rachidian anchoring device with pedicular hooks (2, 4), permitting the emplacement and securement of a connecting rod (3) at the level of each vertebra (9) of a vertebral column, comprises particular hooks (2, 4) provided with securement means for the reception and blocking of a transverse rod (5) connecting said pedicular hooks (2, 4) together and permitting exerting compression between the two pedicular hooks (2, 4) in the direction of the center of the vertebra (9).

Abstract: The vertebral anchoring device according to the present invention comprises a connector (2), a connecting rod (10) and a polyaxial anchoring screw (3) comprising a spherical head (15) and a screw-threaded body (16) whose external diameter d at a summit of the screw threads (17) is greater than the external diameter a of the spherical head (15), each connector (2) being constituted by a connecting element (4) comprising vertical branches (5, 6) delimiting an opening (7) of U shape, and by a locking clip (8) provided with a pressure screw (9) for blocking in the bottom of the U the connecting rod (10), said connecting element (4) being pierced at its middle with a vertical bore (11) permitting receiving opposite the opening (7) a blocking device (19) formed by a ring (20) and a screw-threaded socket (21) for the emplacement and positioning of the connector (2) on the spherical head (15) of the anchoring screw (3).

Abstract: A device for the attachment to a rod (1) of a member (24) such as a screw, a hook or the like, in particular for spinal instrumentation. The device interacts with a smooth rod (1) and comprises an intermediate socket in the shape of a split ring (22) engageable on said rod. A tightening means (23) is arranged on the ring (22) at the split therein so that when it is tightened, the rod (1) protrudes from the ring while engaging the bottom of a U-shaped body to which the member is secured, whereas the free ends of the ring flanges (221, 222) engage both the rod (1) and the body (21). The device is useful in the field of orthopaedic equipment fitted during spinal surgery.