Abstract: A bone screw is created, with a thread section (1) with a tip (6) at a first end and a head (8) for engaging with a screwdriver at the opposite second end, which serves as traction element to connect shattered or split off parts of bones to one another. So that fusion of the screw with the bones can take place, the thread section (1) is constructed as tubular and its wall has a plurality of recesses.

Abstract: A dynamic anchoring device is described. An element with a shank for anchoring in a bone or a vertebra and with a head connected to the shank is provided with a receiving part for the head and with an elastomeric pressure element acting on the head. The pressure element is formed and located in such a way that, upon a movement of the element from a first angular position of the shank relative to the receiving part into a second angular position, it exerts a return force on the head. Further, a dynamic stabilization device, in particular for vertebrae, is provided. In such a stabilization device, a rod is connected two anchoring devices. At least one of the anchoring devices is constructed as dynamic anchoring element.

Abstract: A shaft for anchoring in a vertebra or bone section is connected to a receiving part which serves to connect to a rod having a pre-determined diameter (D). The receiving part provides a U-shaped recess, forming a channel for the reception of the rod, and two legs. The legs are free on their ends and have a thread that cooperates with a securing element to fix the rod in the receiving part. When inserted into the receiving part, the rod surface facing an end surface is at a pre-determined distance (A) in an axial direction from the end surface. The thread of the legs extends from the end surface a distance that is smaller than or equal to the pre-determined distance (A). Also, an undercut is provided adjacent to the thread whose edge farthest away from the thread is located at a distance (B) from the end surface.

Abstract: An elastic or flexible element for use in a stabilization device for bones or vertebrae is provided. The elastic or flexible element is provided in the form of an essentially cylindrical body with a first end and a second end opposite thereto, wherein at least one of the opposite ends of the cylindrical body comprises a coaxial bore hole with an internal thread for connecting to a shaft and/or a head of a bone screw or for connecting to a rod section. The present invention further provides a bone anchoring element, e.g. a bone screw, with a shaft for the anchoring in a bone, whereby the shaft comprises an elastic or flexible section which is formed integrally with the shaft or as a separate elastic or flexible element. It is preferable for the elastic section to be implemented in the form of a helical spring.

Abstract: A rod-shaped implant element is provided for connecting at least two bone anchoring elements. Each bone anchoring element includes an anchoring section to be anchored in the bone and a receiver member to be connected to the rod-shaped implant element. The rod-shaped implant element includes, a longitudinal axis, at least one first length of a rigid section that is configured to cooperate with and be received in the receiver member, a second length of a flexible section adjacent to the rigid section, a bore coaxial to the longitudinal axis and extending through the rigid section and the flexible section, and a core accommodated in the bore, the core having two opposite ends. At least one end of the core is freely movable in the bore when said flexible section is extended or compressed in a direction of the longitudinal axis.

Abstract: A space keeper for vertebrae or intervertebral disks is provided, which has a tubular section and teeth on the respective ends of the space keeper. On at least one end of the tubular section an element is provided, which has a top plate which is tiltable about an angle to the longitudinal axis of the tubular section.

Abstract: A space keeper for insertion between two vertebrae which has a variable axial length is provided. The space keeper possesses a sleeve-like first member (2) and a second member (3) guided in the latter and movable relative to the first member in the axial direction for adjusting an overall length. In order that adjustability during operating is facilitated the two members (2, 3) are connected to one another by a lever (7, 8), wherein one center of motion (16) of the lever is connected to one member (3) and the other center of motion (18) is connected in terms of action to the other member (2).

Abstract: A bone anchoring device has an anchoring element, a receiving portion, and a pressure element. The anchoring element includes a shank to be anchored in a bone or a vertebra and a head, the head having an exterior surface with a spherical segment-shaped portion. The shank and the head are separate parts. The receiving portion includes a first end, a second end, a longitudinal axis passing through the two ends, a bore coaxial with the longitudinal axis, and a first region adjacent to the second end for receiving a spherical segment-shaped section of the head. The pressure element exerts pressure on the head to lock the head in the receiving portion. The head has a hollow inner portion to receive a free end portion of the shank and wherein the head and the end portion are formed such that the end portion can be elastically clamped by the head.

Abstract: A dynamic anchoring device is described. An element with a shank for anchoring in a bone or a vertebra and with a head connected to the shank is provided with a receiving part for the head and with an elastomeric pressure element acting on the head. The pressure element is formed and located in such a way that, upon a movement of the element from a first angular position of the shank relative to the receiving part into a second angular position, it exerts a return force on the head. Further, a dynamic stabilization device, in particular for vertebrae, is provided. In such a stabilization device, a rod is connected two anchoring devices. At least one of the anchoring devices is constructed as dynamic anchoring element.

Abstract: The present invention concerns a space holder, especially for vertebrae or intervertebral discs for implantation into human or animal organisms, having a cylinder-like body (1) and, at the ends of the cylinder-like body, means (2) provided for connecting to adjacent body parts, said cylinder-like body (1) essentially being formed as a solid cylinder from at least one material that is elastically deformable under the conditions of use, such that the space holder is compressible and extensible in the axial direction and, with reference to means (2) provided at the ends for connecting the space holder to adjacent body parts, can bend about a radial axis of rotation (13).

Abstract: A stabilization device for bones or vertebrae comprises a substantially cylindrical elastic element. The elastic element has a first end and a second end opposite to the first end. An elastic section extends between the first end and the second end. The elastic section includes at least first and second helical coils. The first and second helical coils are arranged coaxially so that the first helical coil extends at least in a portion between the second helical coil. The elastic element may form, for example, a portion of a rod, bone anchoring element, or plate.

Abstract: The present invention concerns a flexible connecting device for implantation into the human or animal body and especially for stabilizing the spine with a first rod, which has at least one flexible middle section and at least two connecting sections. At least one part of the flexible middle section includes an adjustment element, such as a flexible element or a stabilization element, which is arranged outside the cross-section of the first rod and connected to the first rod at a first location.

Abstract: A rod-shaped implant element is provided for connecting at least two bone anchoring elements. Each bone anchoring element includes an anchoring section to be anchored in the bone and a receiver member to be connected to the rod-shaped implant element. The rod-shaped implant element includes, a longitudinal axis, at least one first length of a rigid section that is configured to cooperate with and be received in the receiver member, a second length of a flexible section adjacent to the rigid section, a bore coaxial to the longitudinal axis and extending through the rigid section and the flexible section, and a core accommodated in the bore, the core having two opposite ends. At least one end of the core is freely movable in the bore when said flexible section is extended or compressed in a direction of the longitudinal axis.

Abstract: A stabilization device for bones or vertebrae comprises a substantially cylindrical elastic element. The elastic element has a first end and a second end opposite to the first end. An elastic section extends between the first end and the second end. The elastic section includes at least first and second helical coils. The first and second helical coils are arranged coaxially so that the first helical coil extends at least in a portion between the second helical coil. The elastic element may form, for example, a portion of a rod, bone anchoring element, or plate.

Abstract: A bone screw is provided, with a thread section (2) of tubular construction having a tip (3) at its first end and a second end opposite the latter. The tubular thread section (2) comprises a bone thread (22) on its outer wall, and the wall of the thread section (2) comprises a plurality of recesses (21). The bone screw further includes a holding element (4, 6) with a first section (41, 61) for connection to the thread section (2) and with a rod-like second section (43, 63) which in the inserted state of the holding element (4, 6) protrudes beyond the second end of the thread section (2). A stop is provided for limiting the distance of insertion of the holding element (4, 6) in the thread section (2). The holding element (4, 6) comprises an element (44, 64) at its free end for engagement with a screw-in tool.

Abstract: An instrument for assembling a bone anchoring device includes a shank with a shaft section to be anchored in a bone and a engagement end, a head being separate from the shank and having a through bore, and a receiving part having a first end, a second end and a longitudinal bore extending from the first to the second end, the head being positionable within the bore at the second end. The instrument includes a holding portion arranged to hold a pin, which has a rod section with a length and a diameter suited to fit and extend at least through the bore of the head, and which has a free end portion extending from the rod section such as to project from the bore of the head when the pin is inserted, and configured to engage with the engagement end of the shank.

Abstract: A bone anchoring device, includes a receiving part for receiving a rod-shaped implant element, the receiving part having a first bore coaxial with a longitudinal axis and extending from a first end of the receiving part, and a recess extending from the first end to accomplish insertion of the rod-shaped implant element. The device further includes a bone screw having a threaded section for insertion into the bone and being fixed at or positionable at a second end of the receiving part and a fixation element provided to the first bore to fixate a rigid section of the rod-shaped implant element. The rigid section of the rod-shaped implant element has a first width, and the recess of the receiving part has a second width. The second width is larger than the first width, such that the recess may accommodate a stepped portion of the rod-shaped implant element that has an increased thickness.

Abstract: An expandable intervertebral implant includes a front wall, a back wall spaced apart from the front wall, and two side walls connecting the front wall and the back wall at their respective ends. The walls define a space. The implant further includes a bottom face, a top face, at least one engagement member with an engagement surface for engagement with the end plate of a vertebral body, a first adjusting element and a second adjusting element which are supported by a first support member and a second support member, respectively, and which cooperate with the respective support member such that the engagement member is reciprocally movable between a first end position and a second end position. In the first end position, the engagement surface does not project beyond the bottom face or the top face and in the second end position, the engagement surface at least partially projects outwardly beyond the bottom face or the top face. The first and the second support members are coupled by a coupling mechanism.

Abstract: An elongated implant device for stabilizing the spinal column includes a rod-shaped member having a first end and a second end, the rod-shaped member defining a longitudinal axis of the implant device, a sleeve which is slidably arranged on the rod-shaped member, the sleeve having a free end and a coupled end, the coupled end being connected with an axial dampening element, and the axial dampening element, which is connected between the sleeve and the second end of the rod-shaped member to damp a movement of the sleeve along the longitudinal axis. The first end of the rod-shaped member may be configured to be connected to a first bone anchor and the sleeve may be configured to be connected to a second bone anchor.

Abstract: A bone fixing device and in particular a device for stabilizing cervical vertebrae is provided, (with) a plate (2, 200) with at least one recess (5) for guiding through a section (15, 61, 62) of a bone screw (6, 60), a connecting element (20, 30), displaceable in the recess, for connecting the bone screw to the plate and a securing device (10, 11) for securing the connecting element against falling out of the recess.