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 bone screw having a screw member possessing a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw is provided. The receiving part has on open first bore and a substantially U-shaped cross-section having two free legs provided with a thread. Furthermore, the receiving part has a second bore on the end opposite to the first bore whose diameter is greater than that of the threaded section and smaller than that of the head. On the bottom of the first bore a seat for the head is provided. In order that the screw member can be pivoted to at least one side by an enlarged angle, the edge bounding the free end of the second bore viewed relative to the axis of the first bore is of asymmetric construction.

Abstract: A flexible space holder made of at least one biocompatible, rigid material having a tube-like body, with one or more flexible areas is described. The flexible space holder can be temporarily or permanently inserted into a human or animal. Furthermore, the flexible space holder can be surrounded by an elastomeric sleeve. Alternatively, an elastic core can be inserted into the center of the flexible space holder.

Abstract: An element with a shank (1) and a holding element (2) connected to it for connecting to a rod (100) is provided, wherein the holding element (2) has a recess (3) having a U-shaped cross-section for receiving the rod (100) with two legs (4, 5) open at one end (6) and an inner thread (7) on the open legs (4, 5) and a locking element (9) with an outer thread (8) which cooperates with the inner thread of the legs, wherein the inner thread (7) of the legs and the outer thread (8) of the locking element are constructed with a flat thread in which the two flanks (7a, 7b; 8a, 8b)) enclose an angle of 90° in each case with the screw axis (S, M). This prevents splaying of the open legs when the locking element is screwed in. The flat thread is easy to produce.

Abstract: A stabilization device for bone parts or vertebrae includes two bone anchoring devices for anchoring in the bone parts or vertebrae. At least one of the bone anchoring devices includes an anchoring element with an anchoring section for anchoring in a bone part or a vertebra and a head, and a receiving part for receiving a stabilization rod. The receiving part has a seat for receiving the head so that the head can pivot with respect to the receiving part. The stabilization device includes a first pressure element which is movable in the receiving part so that it can be pressed onto the head to lock the angular position of the head. The stabilization device includes at least two stabilization rod sections, and at least two guiding channels within the receiving part which have a distance from each other for guiding through the at least two stabilization rod sections so that the rod sections do not touch each other.

Abstract: A spacer for insertion between two vertebrae includes a variable axial length and comprises a first member having a hollow interior and a tubular wall and a second member having a hollow interior and a tubular wall the second member being slidable within the first member in an axial direction for adjusting an overall length. At least the first member or the second member comprises an access opening in its wall, the opening having a size which is adapted for inserting bone grafts through the opening into the interior. The spacer further comprises a length adjustment structure being engageable with an expansion tool for telescoping the second member relative to the first member and a locking structure for fixing the axial length. The access opening, the length adjustment structure and the locking structure are arranged so as to be accessible from the same side of the spacer. The spacer allows in situ filling of bone grafts into its interior and an improved handling.

Abstract: An anchoring element for a stabilization device for bones or vertebrae, with which a bone or vertebra can be connected to a rod-shaped element is described. By providing for at least one degree of rotational freedom between the rod and an anchoring element that is firmly connected to the bone or vertebra, the transfer of torque (M) onto the anchoring element and can be prevented as well as loosening or even separation of the bone anchoring element from the bone or vertebra. Moreover, the invention provides a stabilization device, in which such bone anchoring elements are used.

Abstract: A rod-shaped implant element for the connection of bone anchoring elements includes at least one rigid section that is configured to be placed in a receiver member of a bone anchoring element and a flexible section that is adjacent to the rigid section. The flexible section and the rigid section are formed as a continuous one-piece element.

Abstract: A bone screw having a screw member possessing a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw is provided. The receiving part has on open first bore and a substantially U-shaped cross-section having two free legs provided with a thread. Furthermore, the receiving part has a second bore on the end opposite to the first bore whose diameter is greater than that of the threaded section and smaller than that of the head. On the bottom of the first bore a seat for the head is provided. In order that the screw member can be pivoted to at least one side by an enlarged angle, the edge bounding the free end of the second bore viewed relative to the axis of the first bore is of asymmetric construction.

Abstract: An implant for use in stabilizing vertebral bodies or bones includes a first end and a second end, a tubular section between the first end and the second end having a longitudinal axis. The tubular section is flexible in such a way that it is expandable in a radial direction when a force acts in an axial direction which reduces the distance between the first end and the second end.

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 element with a shank (1) and a holding element (2) connected to it for connecting to a rod (100) is provided. The holding element (2) has a recess (3) having a U-shaped cross-section for receiving the rod (100) with two legs (4, 5) open at one end (6) and an inner thread (7) on the open legs (4, 5) and a locking element (9) with an outer thread (8) which cooperates with the inner thread of the legs, wherein the inner thread (7) of the legs and the outer thread (8) of the locking element are constructed with a flat thread in which the two flanks (7a, 7b; 8a, 8b)) enclose an angle of 90° in each case with the screw axis (S, M). This prevents splaying of the open legs when the locking element is screwed in. The flat thread is easy to produce.

Abstract: An intervertebral disk prosthesis is disclosed. The intervertebral disk prosthesis has a base plate, a top plate opposite the base plate, and an intervening core located between the top plate and base plate. One of the plates has a first concave contact face facing the core, which has an adjacent first convex contact face. A groove is provided around one of the contact faces in which an elastic ring is placed. When placed in the groove, the elastic ring is also in contact with the opposite contact face.

Abstract: An anchoring element for a stabilization device for bones or vertebrae, with which a bone or vertebra can be connected to a rod-shaped element is described. By providing for at least one degree of rotational freedom between the rod and an anchoring element that is firmly connected to the bone or vertebra, the transfer of torque (M) onto the anchoring element and can be prevented as well as loosening or even separation of the bone anchoring element from the bone or vertebra. Moreover, the invention provides a stabilization device, in which such bone anchoring elements are used.

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 stabilization device for bone parts or vertebrae includes two bone anchoring devices for anchoring in the bone parts or vertebrae. At least one of the bone anchoring devices includes an anchoring element with an anchoring section for anchoring in a bone part or a vertebra and a head, and a receiving part for receiving a stabilization rod. The receiving part has a seat for receiving the head so that the head can pivot with respect to the receiving part. The stabilization device includes a first pressure element which is movable in the receiving part so that it can be pressed onto the head to lock the angular position of the head. The stabilization device includes at least two stabilization rod sections, and at least two guiding channels within the receiving part which have a distance from each other for guiding through the at least two stabilization rod sections so that the rod sections do not touch each other.

Abstract: A bone anchoring device includes an anchoring element having a shank to be anchored in a bone or a vertebra, a receiving part connected to the shank the receiving part having a first end opposite to the shank and a second end facing the shank, a longitudinal axis passing through the two ends, a bore coaxial with the longitudinal axis extending from the first end through at least a portion of the receiving part and a substantially U-shaped recess for receiving a rod The U-shaped recess forms two free legs extending in the direction of the first end, the legs are provided with an internal thread. A locking device for securing the rod in the receiving part is provided which includes an external thread cooperating with the internal thread.

Abstract: An implant for use in stabilizing vertebral bodies or bones includes a first end and a second end, a tubular section between the first end and the second end having a longitudinal axis. The tubular section is flexible in such a way that it is expandable in a radial direction when a force acts in an axial direction which reduces the distance between the first end and the second end.

Abstract: The present invention refers to a flexible space holder for temporary or permanent introdution into a human or animal body of at least one biocompatible, rigid material having a tube-like body (1), with one or more flexible areas being formed by material recesses mare provided for.

Abstract: A rod-shaped implant element for the connection of bone anchoring elements includes at least one rigid section that is configured to be placed in a receiver member of a bone anchoring element and a flexible section that is adjacent to the rigid section. The flexible section and the rigid section are formed as a continuous one-piece element.