Abstract: The kit of parts comprises a distal shaft part (2) and a neck part (3) which can be equipped with a joint ball (10), with the neck part being supported on the shaft part (2) by approximately rectangular shaped supporting surfaces (2c) and (3c) positioned transverse to the longitudinal axis (L) of the shaft part (2). The shaft part (2) and the neck part (3) are provided with prismatic guide surfaces (2d) and (3d) brought together in a form-fit and orientated parallel to the longitudinal axis (L), and are rigidly connected to each other by an extensible shaft screw (11) which can be elastically prestressed to carry a predetermined bending moment. The guide surfaces (2d) and (3d) are formed at a spigot extension (2b) of the shaft part (2) and at a complementary recess (3b) of the neck part (3), respectively.

Abstract: The kit contains a metal outer shell (1), an inner shell (2) which can be inserted therein, and fastening elements which can be mounted on the outer shell (1) so that they substantially protrude radially, and which include at least one support (4) and two screw connections (5). The fastening elements, which can be designed with varying support lengths, together with the outer shell (1) form a tripod, which positions the outer shell (1) outside the osseous tissue (6). The outer shell (1) is designed all around with through-holes (17) mounted at different angles (14), which permit the mounting of the screw connections (5) in correspondingly different angular positions with respect to the support (4).

Abstract: Bone and cartilage are regenerated in a patient by a process of removing fatty tissue such as omentum tissue from a patient, comminuting the tissue to form small tissue particles, suspending the particles in a liquid to form a suspension, depositing the suspension on a solid carrier to prepare a solid implanting material, implanting the implanting material in a patient in an environment favoring bone or cartilage formation, and regenerating bone or cartilage in the patient. The carrier can be demineralized bone, collagen, mineral material or synthetic polymer material in pulverulent, textile, porous particle or monolith form. A cell adhesion agent may be applied to the carrier or added to the suspension, and a growth factor may be deposited on the carrier. Comminuting is performed by digesting with an enzyme and/by mechanically comminuting. Liquid used to form the suspension may contain a gel precursor which is gelled after the suspension is deposited to the carrier.

Abstract: The invention shows process steps for the production of attachment faces (3) on metal joint implants, which stand at an angle 0<a<90 degrees against the insertion and attachment direction (40) and comprise cupular shoulder portions (14), which are opened for attachment against the insertion and attachment direction (40). In a first step recesses (6) and shoulders (8) are produced by machining, casting or pressing in the attachment faces (3) of a blank (2) at right angles to the insertion and attachment direction (40). The shoulders (8) have an acute-angled cross section, have a height of between 0.3 and 2 mm and a spacing (31) which corresponds roughly to the twice the height (10).

Abstract: An implant consisting of several support members (7), which are produced from an elastic plastic, is provided as a replacement for a part, which is no longer capable of bearing loads, of the core region of an intervertebral disk (3). The support members (7) are inserted one after the other into a central cavity (5) constructed in the core region by means of a tube (6) passing through an outer annular region (4) of the intervertebral disk (3) until said cavity is filled. When the cavity (5) becomes clogged with the filling members (7), they become deposited on the boundary walls of the annular region (4) and against one another and are elastically deformed under stress. Accordingly a universal implant which can be adapted to cavities (5) of any shape, and which forms a relatively compact, elastic support structure, can be achieved.

Abstract: The invention discloses a fastening system for pedicel screws anchorable in different vertebrae. The spherical screw heads lie in spherical shells of apertured counter-bodies. The counter-bodies have planar support surfaces which lie on a supporting link in the region of elongate holes. A screw element is provided in the axial direction of each pedicel screw and is pivotably journalled at the supporting link with a spherical support surface arranged in the region of the elongate hole. The pedicel screws are generally skewed relative to one another and can, when account is taken of the nature of the bone, be rigidly connected to the supporting links via the screw elements due to the fact that the support surfaces can be clamped against one another in a self-locking manner on pedicel screws which are positioned inclined relative to the support surfaces.

Abstract: The element (20) according to the invention comprises a biodegradable body which is before or during the implantation of an orthopaedic prosthesis (1) inserted into a recess (2) in the prosthesis (1) such that the rigidity of the prosthesis is increased. The element (20) provides mechanical connection between the shell segments (1a, 1b, 1c) so that the element (20) performs a supporting function which reduces the elastic properties or the possibilities of movement of the outer shell (1). The ability of the biodegradable element (20) to transfer forces is increasingly reduced after the implantation so that the outer shell (1) of the artificial acetabulum has increasingly more elastic properties depending on the mechanical properties determined by the structure. Some time after the implantation, the biodegradable element (20) degrades so much that it no longer transfers any forces.

Abstract: The element (20) according to the invention comprises a biodegradable body which is, before or during the implantation of an orthopaedic prosthesis (1), inserted into a recess (2) in the prosthesis (1) such that the rigidity of the prosthesis is increased. The element (20) provides mechanical connection between the shell segments (1a, 1b, 1c) so that the element (20) performs a supporting function which reduces the elastic properties of the outer shell (1). The ability of the biodegradable element (20) to transfer forces is increasingly reduced after the implantation so that the outer shell (1) of the artificial acetabulum has increasingly more elastic properties depending on the mechanical properties determined by the structure. Some time after the implantation, the biodegradable element (20) degrades so much that it no longer transfers any forces.

Abstract: The device contains a rasp (2) corresponding to the implant shaft, which comprises a shaft body (4), which can be driven into the osseous tissue, and a neck part (5) protruding therefrom, which can be equipped with a test ball corresponding to the ball-and-socket joint, and a grip part (7) which can be coupled to the rasp (2) for the insertion and withdrawal of the shaft body (4). The grip part (7) contains a guide bush (10), which can be slipped onto the neck part (5), and a slip-on part (14) having a stop face which can be placed on a front support face of the neck part (5). On the grip part (7) is articulated a coupling part (11), which comprises a claw (27) which through a recess in the guide sleeve (10) can engage in a recess of the neck part (5) and can be disengaged from it.

Abstract: The invention relates to an artificial joint shell having an outer shell (2) which is implantable in a bone base and a retro-fittable inner shell (3), the inner and outer shells being fixable to one another via a friction-locked clamping force (5), preferably via a self-locking, conical connection. A tunnel (6) is formed in the partition surface (4) between the two shells (2, 3) and connects two points at the shell edge in an arc (37) that extends towards the shell base (7). A wire (8) is threaded through the tunnel (6), and by applying an extraction force to the wire the inner shell (3) is extracted. The extraction force is uniformly applied to the inner insert along the arc (37) prescribed by the tunnel and does not damage the inner shell.

Abstract: A tubular member (1) made from wire, preferably titanium wire, which is manufactured on a round knitting machine, is inserted into the cavity (3c) of a pressing tool (2) having a pressing mold (3b) and die (3a). The tubular member (1) is plastically deformed by the die (3a) introduced into the cavity (3c), so that the member (1) assumes the shape predetermined by the pressing mold (3b), and thus is transformed to produce a member (4) which can be inserted as a filling member (4) into bone cavities, for example as a medullary space barrier.

Abstract: This invention provides an implant (prosthesis) for the replacement of defective biological tissue part. In particular, the implants of this invention are well suited for the replacement of cartilage, more preferably for the replacement of articular cartilage. In one embodiment, the implants comprise a micromatrix constructed from an upper boundary layer and a lower boundary layer where the upper and said lower boundary layers are connected via an intermediate layer with fibers. The implant also includes a nanomatrix situated within the intermediate layer. The nanomatrix contains elements of a size on the order of magnitude of nanometers. The intermediate layer accommodates the nanomatrix such that, for a growing inner pressure the boundary layers are mutually held at a preset distance from one another.

Abstract: The acetabulum (1) in accordance with the invention comprises a spherically formed outer shell (3) as well as a spherically formed inner shell (4) which is inserted into the outer shell (3). The inner shell (4) can, for example, consist of an oxide-ceramic material, in particular of aluminum oxide. The outer shell (4) can consist of, for example, titanium. The outer surface (4c) of the inner shell (4) is formed such that it has a first partial surface (4c) with increasing outer cross-section from the pole (2a) towards the equatorial opening (4b) to a site (4a) with a largest outer diameter, that a further partial surface (4e) with an outer cross-section decreasing towards the equatorial opening (4b) connects to the partial surface (4c), which goes into a further partial surface (4f) with increasing outer cross-section towards the equatorial opening.

Abstract: An inner shell for insertion into an outer shell to thereby form a hip joint socket. The inner shell includes an outwardly projecting thread spigot located at a pole with the thread spigot defining a rotational axis and being screwable into an inner thread of the outer shell. The inner shell further includes a projection arranged at the outer edge and extends outwardly radially to the rotational axis. The projection includes at least one locking part that acts on the outer shell, when the inner shell is placed within the outer shell, in order to prevent rotation of the inner shell about the rotational axis.

Abstract: The outer shell (5) comprises a plurality of through-holes (12) which are provided for the receipt of fastening elements (14) for the fastening of the outer shell (5) in a bone seat (4) and which are each provided with an inner counter-sink (25). The through-holes (12) which are free of fastening elements (14) are each provided with a sealing plug (15) which is insertable from the inside outwards and designed with a sealing surface supportable in and extending around the counter-sink (25). The sealing plug (15) comprises a number of spiral springs (18) which are insertable into the relevant through-hole (12) and form a snap connection with the wall of the through-hole (12), as well as a hat-like central projection (17) disposed separated from the spiral springs (18) which is provided with an inwardly open blind bore (17a) for the receipt of a placement tool (20) screwable into it.

Abstract: With the invention there is shown a C-shaped clip as a compression member (8) which can be inserted into a pocket (15) of a joint support (4) and which can itself be secured in this pocket against falling out of place by a latched arrangement. In this arrangement the two limbs of the clip act transversely to their spring direction as a spacer between a spring tongue (5) and a shoulder which are formed on the joint support (4). In this way a simple securing device arises which is recessed in the joint support (4) and which prevents springing back of the latched spring tongue (5) and is only loaded in compression. In the installed state the spring tongue (5) is not itself subjected to any alternating bending loads.

Abstract: The acetabulum (1) comprises a semispherical support shell (2d) whose inner surface (20) has at least three retaining means (2b) which protrude into the interior. Furthermore, the acetabulum (1) comprises a semispherical inner shell (3) which can be inserted into the correspondingly dimensioned semispherical support shell (2d). The outer surface (30) of the inner shell (3) has at least one recess (3b) extending in a helical manner, in such a way that the inner shell (3) can be rotated into the support shell (2d) with a screw motion, thereby resulting in operative connection between the protruding retaining means (2b) of the support shell (2d) and the recess (3b) extending in a helical manner of the inner shell (3), so that the inner shell (3) is retained in the support shell (2d).

Abstract: A joint socket (2) for a hip joint prosthesis comprises an outer shell (5) adapted for being anchored into a bone seat and an inner shell (6) adapted for receiving a ball of a joint. A threaded plug (10) is threadably coupled within a threaded bore (8) of the outer shell and a projection (22) extends from the polar region of the inner shell into an axial recess (20) of the threaded plug for centering the inner shell relative to the outer shell. The threaded plug seals off the inner volume of the outer shell, thereby preventing contact between rubbed off particles of the interacting inner and outer shells and the bone tissue. In addition, it allows the surgeon to directly observe the bone tissue lying behind the threaded bore of the implanted outer shell.

Abstract: The invention shows process steps for the production of attachment faces (3) on metal joint implants, which stand at an angle 0<.alpha.<90 degrees against the insertion and attachment direction (40) and comprise cupular shoulder portions (14), which are opened for attachment against the insertion and attachment direction (40). In a first step, recesses (6) and shoulders (8) are produced by machining, casting or pressing in the attachment faces (3) of a blank (2) at right angles to the insertion and attachment direction (40). The shoulders (8) have an acute-angled cross section, have a height of between 0.3 and 2 mm and a spacing (31) which corresponds roughly to the twice the height (10).

Abstract: The metallic inner shell (1) is guidable into the inner hollow volume of an outer shell (2) and fastenable to the outer shell (2) with the fastening element (8). A two-part hip joint socket (3) is thus produced. To achieve this, support regions of the inner shell (1) are approximately positioned into a groove (11) of the outer shell (2) and, from there, the inner shell (1) is moved into the outer shell (2) via a pivotal movement so that the support regions completely seat into the groove (11) and the fastening element (8) adopts the position shown. The intermediate volume between the inner shell (1) and the outer shell (2) thus narrows in the direction of taper (13) so that the fastening element (8), when tightened in the direction (13), wedges itself with its head (9) between the boundary surface (1i) of the inner shell (1) and the groove (11) of the outer shell (2).