Abstract: Provided is a joint replacement with a joint socket (10) having a concave joint surface (11), and with a joint insert (20) having a concave joint surface (21) and a convex joint surface (22) which are each delimited by a peripheral edge (23, 24). The convex joint surface (22) of the joint insert (20) is designed, in the assembled state, to form a first partial joint with the concave joint surface (11) of the joint socket (10). Moreover, the concave joint surface (21) of the joint insert (20) is designed, in the assembled state, to form a second partial joint with the convex joint surface (32) of a joint head (30). The joint socket (10) and the joint insert (20) each have a securing means (12, 25, 26) for preventing dislocation of the joint replacement.

Abstract: Provided is a joint replacement with a joint socket (10) having a concave joint surface (11), and with a joint insert (20) having a concave joint surface (21) and a convex joint surface (22) which are each delimited by a peripheral edge (23, 24). The convex joint surface (22) of the joint insert (20) is designed, in the assembled state, to form a first partial joint with the concave joint surface (11) of the joint socket (10). Moreover, the concave joint surface (21) of the joint insert (20) is designed, in the assembled state, to form a second partial joint with the convex joint surface (32) of a joint head (30). The joint socket (10) and the joint insert (20) each have a securing means (12, 25, 26) for preventing dislocation of the joint replacement.

Abstract: A finger joint prosthesis includes a joint body 14 having first and second joint elements pivotably connected about an axis of rotation and anchoring bars 30, 32 extend from the joint body for securing to a proximal and a distal phalanx. The anchoring bars 30, 32 include one or more securing eyes 40, 42, 44 with openings for receiving fixing screws therein. To provide improved primary and secondary fixing, an end securing element is provided distally from the axis of rotation on the anchoring bar 30, 32 of at least one joint element.

Abstract: In a finger joint prosthesis comprising a joint body 14 having first and second joint elements which are connected together pivotably about an axis of rotation and from which a respective anchoring bar 30, 32 extends for securing to a proximal and/or distal phalanx, wherein the anchoring bars 30, 32 can have one or more securing eyes 40, 42, 44 with openings for receiving fixing screws. To provide improved primary and secondary fixing it is proposed that an end securing element is provided distally from the axis of rotation on the anchoring bar 30, 32 of at least one joint element.

Abstract: A cervical prosthesis includes a lower cover plate which is configured to be connected to a lower vertebral body, an upper cover plate which is configured to be connected to an upper vertebral body, and a prosthesis core which forms a hinged connection between the upper cover plate and lower cover plate. The bottom surface of the lower cover plate is substantially flat. The top surface of the upper cover plate is convex at least in sagittal section.

Abstract: A hip-joint prosthesis includes a shaft which is configured to be inserted into the femur and whose surface has an osteoinductive finish. This finish is provided exclusively in the metaphyseal portion of the shaft and laterally from the line delineating the maximum antero-posterior dimension of the shaft cross section. This ensures a better involvement of the metaphyseal spongiosa in the flow of forces, without compromising the ability to per-form follow-up surgery on the prosthesis.

Abstract: A cervical intervertebral prosthesis includes lower and upper anchoring plates with a prosthesis core arranged between them to create an articulated connection. The anchoring plates are designed to bear with their anchoring plate surfaces on adjacent vertebral bodies. At least one anchoring plate surface has a rib-like projection thereon which can be used to engage in the vertebral body with a form fit. In order to produce a corresponding recess in the vertebral body, an instrument having a handle, a stem, a head part and an excavating element that can be retracted into the head part may be used. This permits considerably improved securing of the cervical intervertebral prosthesis against unintended movement. The medullary canal running along the posterior margin of the vertebral column is in this way protected from damage.

Abstract: A cervical intervertebral prosthesis includes at least one cover plate that is configured to be connected to one of two adjacent vertebral bodies and an instrument for positioning a fastening device at one of the vertebral bodies in order to secure the intervertebral prosthesis. The instrument is separate from the fastening device and includes a drill gauge and arms with projections for holding the cervical intervertebral prosthesis at a predetermined position relative to the drill gauge. The drill gauge has an orientation pointing towards the cover plates at an oblique angle ?.

Abstract: The invention relates to a prosthesis for facet joints (12) of the spinal column, with a bearing piece (23) and a guide rod (21). The bearing piece (23) comprises a pressure plate (24) for resting on an articular surface (13, 14) of the vertebra (1) and, on the opposite side, a bearing insert (27) which has an articular surface for interacting with an articular surface (13, 14) of an adjacent vertebra (1?). The guide rod (21) is secured on the bearing piece (23) by means of a pivot joint. The bearing forces are transmitted to the vertebra (1) via the pressure plate (24). In this way, the guide rod (21) can have a narrow configuration, such that the slit (18) for receiving the guide rod on the vertebra (1) can also be made narrow. This permits a simple and reliable implantation technique which at the same time is gentle on bone substance.

Abstract: In an intervertebral joint prosthesis for an intervertebral space of the cervical spine, the intervertebral space is delimited by the end plates of the adjacent vertebral bodies. The bearing surfaces of these end plates, when viewed in a frontal plane, have edge zones laterally adjacent to a substantially flat central area that are more strongly curved than the flat central area. These edge zones are also more strongly mineralized than the central area and are therefore particularly stable. At least one of the prosthesis surfaces intended to bear on a vertebral body surface has a lateral extend reaching into the edge zones. The convex curvature of this prosthesis surface, when viewed in the frontal plane, is at least as great as the corresponding curvature of the surface of the end plates. This ensures that the prosthesis is also supported on the particularly stable edge zones, and these edge zones do not have to be subjected to any substantial removal of material.

Abstract: The instrument set and the method for preparing a cervical vertebral body (2) to receive an abutment surface (13) of an intervertebral joint prosthesis (11) in the intervertebral space (1) are characterized in that a guide element (3), which is to be inserted into the intervertebral space (1), and a working instrument (10), for working at least one vertebral body (2), have interacting guide surfaces (5, 9a). The working range of the working instrument is limited by the guide surfaces (5, 9a).

Abstract: A cervical intervertebral disk prosthesis has two cover plates, at least one of which is provided with a wedge-shaped connection surface for connection to a vertebral body and which is wider than it is deep. The dorsal edge of the connection surface may be set back from the dorsolateral edge of the cover plate having the connection surface and be connected to the dorsal edge protruding above it via a rounding or bevel.

Abstract: Hip-joint prosthesis with a stem (12) which is to be inserted into the femur and which comprises a part (13) projecting into the trochanteric region (4) of the bone. For the purpose of more intimate contact with the bone, this part (13) is provided with a coating (16) which contains an osteoinductive substance.

Abstract: Cervical intervertebral prosthesis with at least one cover plate (3, 4) to be connected to one of the two adjacent vertebral bodies (1, 2), and with a securing plate (12) which secures this cover plate (3, 4) and is to be fastened to the ventral surface of the vertebral body (1, 2). According to the invention, the securing plate (12) is a separate part unconnected to the cover plate (3, 4). It can be biodegradable.

Abstract: Cervical prosthesis consisting of a lower cover plate (10) which is to be connected to a lower vertebral body, an upper cover plate (11) which is to be connected to an upper vertebral body, and a prosthesis core (12) which forms a hinged connection between the upper cover plate and lower cover plate. The bottom surface of the lower cover plate (10) is substantially flat. The top surface (14) of the upper cover plate (11) is convex at least in sagittal section.

Abstract: Set of cervical intervertebral prostheses which have a hinge with a predefined center (18) of the hinge movement. To permit better adaptation to the different hinge radii of the cervical intervertebral disks, it is provided that the set of cervical intervertebral prostheses comprises at least two different prostheses with different hinge radius.

Abstract: In order to use moved masses which are as small as possible in a machine tool, in particular for the rotary machining of workpieces, comprising a machine frame, a tool carrier, a workpiece carrier, it is proposed to provide a parallel kinematic arrangement, which has three parallelogram guides connected in an articulated manner at one end to a receiving means for one of the carriers and at the other end to a slide and an N/C-controlled linear drive for each slide and by which the carrier arranged on the receiving means is movable relative to the machine frame in a three-dimensional movement space.

Abstract: In order to improve a lathe, in particular, a multiple-spindle lathe, comprising at least one workpiece spindle arranged on a machine frame and rotatable about a spindle axis, this workpiece spindle projecting with its front end into an operating area, and a tool slide with a longitudinal slide element guided for displacement in Z-direction parallel to the spindle axis in a longitudinal guide means located outside the operating area and arranged on a slide stand of the machine frame and with a cross slide arranged in the operating area and displaceable in X-direction transversely to the spindle axis in relation to the longitudinal slide element, this cross slide being guided on a cross slide guide means arranged at a front end of the longitudinal slide element and movable by means of a cross feed gear, such that the tool slide as a whole is constructed in as space-saving a manner as possible and, in particular, requires little space in the operating area in order to create the possibility of using several too

Abstract: In order to improve a multiple-spindle turning machine, comprising a machine frame, a cylinder rotatable around an essentially horizontal rotational axis relative to the machine frame, work piece spindles arranged on the cylinder in respective individual positions with spindle axes, which are aligned essentially parallel to the rotational axis and which during the machining of a work piece are movable relative to the cylinder by means of linear drives in the direction of their spindle axis and independently of one another, and tools arranged on tool supports for machining the work pieces held in the work piece spindles, in such a way as to allow the respective work piece spindle to be positioned as precisely as possible in the direction of its spindle axis, it is proposed that each of the work piece spindles is allocated its own linear drive disposed on the cylinder to move it in the direction of the spindle axis, and that the work piece spindle is constantly coupled to the linear drive.

Abstract: In order to improve a multiple-spindle turning machine comprising a machine frame, two cylinders arranged on opposite sides of an operating area and mounted on the machine frame to be respectively rotatable around an essentially horizontal rotational axis, machining means arranged on the cylinders in respective individual positions with central axes aligned essentially parallel to the rotational axis, and tools for machining work pieces held in at least one portion of the machining means, in such a way that it may also be used as universally as possible for other work pieces, it is proposed that the cylinders are rotatable around their rotational axis independently of one another relative to the machine frame.