Abstract: The invention relates to a ball draw-off apparatus for shaft prostheses with balls (3) which can be placed onto the prosthesis neck (2). The apparatus has two rotary bodies (5a, 5b) which are rotatably supported in a housing (4), which can in each case be rotated with a lever arm (6a, 6b) and which with their axes of rotation (7a, 7b) lie in a common plane and form an open gap S in the projection onto the plane F for the introduction of the prosthesis neck (2). The rotary bodies have a profile which with increasing rotation decreases the gap S for clamping the prosthesis neck (2) and causes an increase of the distance of its upper edge (9a, 9b) from the plane F in order to produce a draw-off force P at the placed on ball directly or indirectly via an intermediate body.

Abstract: Spreader apparatuses for knee joints are shown which have two parallel support plates (2, 3) which can be inserted between the femur condyles (4, 5) and the tibia (6) and which can be moved apart in connected form by an adjustment mechanism (10). The adjustment mechanism (10) has a housing (10) at which a stroke-extending tappet (17) is supported via an elastically resilient transmission member (7) in order to simultaneously make the effective spreading travel readable on a scale (8) at the housing (1) and the amount of the spreading force readable on a scale (9) at the housing (1).

Abstract: The locking nail for the repair of femur shaft fractures, also in connection with trochanteric femur fractures, comprises a proximal nail section (2) and a distal nail section (3) adjoining the latter, with the nail sections (2, 3) having bores (2e, 2f, 2h, 2i, 3a, 3b, 3c) for the reception of bone screws, and with the distal nail section (3) having a curvature extending in an anterior-posterior plane (apE) and corresponding substantially to the antecurvature of the femur, with the proximal nail section (2) having at least over a partial section (2a, 2b) a continuous curvature, in particular with constant radius of curvature (R2), extending in a lateral-medial plane (lmE).

Abstract: Femur parts of knee prostheses are shown with the invention which have a center part (2) and a condyle part (3) with contact surfaces (4a, 5a, 6a, 6b, 7b, 8a, 9a, 10a, 11a, 11b, 12a, 12b, 13b) with respect to a resectioned femur stump (1), with the center part (2) having guide surfaces (20) for a patella (19) and outer contact surfaces (4a, 5a) which are at an acute angle &agr;≦90° relative to one another, while the condyle part (3) has running surfaces (27, 28) for the articulation movement and outer contact surfaces (6b, 7b) at an acute angle &bgr;≦90° relative to one another. The center part (2) and the condyle part (3) can be pushed onto the femur stump separately from one another at push-on directions pivoted with respect to one another in order to allow a greater flexion, with the center line of the angle &bgr; being pivoted through an angle of 15°≦&ggr;≦60° with respect to the center line of the angle &agr;.

Abstract: The basket-like container (1) contains a reception volume for bone tissue. After the filling in of the bone tissue the container is implanted. The reception volume is located within a wall (2) which is arranged about an axis (10). This peripheral wall consists of a grid, a fabric or a mesh. Transversely to the axis the wall enables an X-ray optical seeing through of the unfilled reception volume. The surface component, which is permeable by X-rays, amounts to at least 30%.

Abstract: A pistol for the pressing out of bone cement (1) comprises an attachable cement syringe (2) which has a cylinder (3) with an ejection piston (4) and a narrower neck (5) which adjoins at the cylinder (3), with a displacer bar (6) being insertable into the pistol in order to additionally eject residual cement with a second advance mechanism (8). A first piston (9) acts via a piston rod (7) on the ejection piston (4). A second piston (11), which is displaceably journalled in the piston rod (7) and can be activated independently of the first piston, acts on the displacer bar (6). A fluid (10) which is under pressure is controlled via a control device (12) in such a manner that the displacer bar (6) moves relative to the first piston (9) only when the latter has reached a predetermined end position.

Abstract: The invention shows an artificial finger joint comprising a convex joint head and comprising a concave joint shell which can be fastened independently of one another with a respective shaft in a bone end and which can be moved in an articulation plane from an extension position with parallel shaft axes into a hyperextension position or into an articulation end position. A guide pin projects out of the joint shell in the direction of its shaft axis and protrudes into a pocket of the joint head, with the pocket having a first abutment for the guide pin in the hyperextension position. A second abutment between the joint shell and the joint head prevents a tilting of the guide pin and shaft of the joint shell about the first abutment in hyperextension position.

Abstract: An artificial knee joint has a meniscus part (1) which is displaceably journalled on a tibia platform (2) and a guiding part (7) which is rotatably journalled on the tibia platform (2) and which engages into a guide (8) of the meniscus part (1), with the guiding part and the meniscus part having lateral guiding surfaces (9a, 10a; 9b, 10b) for guiding the meniscus part (1). In order to limit the surface pressure between the guiding surfaces (9a, 9b; 10a, 10b) the lateral guiding surfaces (9a, 9b; 10a, 10b) have different radii of curvature (R1, R2) which are greater than 10 cm, with the sum of the reciprocals of the radii of curvature 1/R1+1/R2 being less than 0.2 cm−1.

Abstract: A glenoid prosthesis including a bearing shell, the reverse side of which has a plurality of anchoring pins which are arranged to one another. At least one anchoring pin has a coupling element, and at least one sleeve with a fitting securable coupling element and an outer anchoring structure is provided in order to selectively enable a cementing in of the anchoring pin or a mechanical hammering in of the pin together with the sleeve which is fixed to it.

Abstract: A humerus head prosthesis including a head and a shaft. A hollow quiver which has one or more openings in the jacket is arranged at the shaft proximally and below the head. The quiver is located at the level of the anatomical position of the tubercles and laterally at the shaft. The jacket openings are formed as threaded bores for screws.

Abstract: Cartilage tissue and implants comprising tissue are produced in vitro starting from cells having the ability to form an extracellular cartilage matrix. Such cells are brought into a cell space (1) and are left in this cell space for producing an extracellular cartilage matrix. The cells are brought into the cell space to have a cell density of ca. 5×107 to 109 cells per cm3 of cell space. The cell space (1) is at least partly separated from a culture medium space (2) surrounding the cell space by means of a semi-permeable wall (3) or by an open-pore wall acting as convection barrier. The open-pore wall can be designed as a plate (7) made of a bone substitute material and constituting the bottom of the cell space (1). The cells settle on such a plate (7) and the cartilage tissue growing in the cell space (1).

Abstract: In the figures, proximal centering apparatuses (4) for collar-less femur shaft prosthesis (1) which can be cemented in and which can be pushed from the medial onto the shaft (3) in the cemented region are shown. The centering apparatus (4) has at least in the medial region a centering wedge (6) which widens towards the proximal and which is connected via webs (7) to a clamping apparatus (8), with the clamping apparatus (8) being arranged in the cement-less region of the prosthesis neck (2) and being removable when the webs (7) are interrupted.

Abstract: The medical/technical tool holder apparatus (2) with torque limitation comprises a receiver (5) for at least one shear body (7) and a shearing means (10a) which is rotatably connected to the receiver (5) and which is arranged in such a manner with respect to a shear body (7) located in the receiver (5) that the shearing means (10a) contacts the shear body (7) as soon as a torque acts on the shearing means (10a), with the shearing means (10a) and the shear body (7) being mutually matched and arranged in such a manner that the shearing means (10a) at least partly severs the shear body (7) when a specific torque is exceeded.

Abstract: A Bone screw for anchoring a marrow nail with transverse bores in a tubular bone. The bone screw had a thread with a pitch S, a core diameter D1 and outer diameter D3. The screw supports the marrow nail with a middle part and is fixed in the bone with a distal part. The thread has a flat cylindrical thread base with a length l>0.3 S. In addition, a second thread with the same pitch S and with the core diameter D1 is present in a proximal head part, but has a greater outer diameter D2>D3 in order to proximally achieve a fixing with a greater thread profile.

Abstract: The figures show a cementable shaft prosthesis (1) comprising a centering apparatus (2) of plastic which can be pushed on at its distal shaft end (3) and which forms a cavity (4) to the distal shaft end (3). Between the distal shaft end (3) and the centering apparatus (2) there exists a clamping connection which enables a deeper sinking in of the shaft end into the cavity in the distal direction. The clamping connection is achieved by a spigot (7) which is formed on at the centering apparatus (2) in the cavity (4) and which protrudes in into a conical bore (5) of the shaft end (3) in the proximal direction.

Abstract: Modular set of an outer shell (1) for an artificial hip joint pan, comprising a shell-shaped outer part (2) and an anchoring aid (7) which is designed as a lug (3, 4), a spike (5) or a hook (6), with the shell-shaped outer part (2) having an end surface (2a) at its equator with bores (2b), and with each anchoring aid (7) having a securing part (3a, 4a, 5a) which is designed to be matched with respect to the end surface (2a) in such a manner that the securing part (3a, 4a, 5a) can be secured at the shell-shaped outer part (2) by means of a screw (6) which engages in the bore (2b).

Abstract: A bone rasp has an elongate body which tapers in the distal direction with first cutting ribs which extend transversely to the longitudinal axis of the body and are arranged in parallel graduations at a first spacing along the longitudinal axis and with second cutting ribs which are formed in parallel graduations at a second spacing at the body. The first and second cutting ribs have a different depth of cut in order to ablate different amounts.

Abstract: Cartilage tissue and implants comprising tissue are produced in vitro starting from cells having the ability to form an extracellular cartilage matrix. Such cells are brought into a cell space (1) and are left in this cell space for producing an extracellular cartilage matrix. The cells are brought into the cell space to have a cell density of ca. 5×107 to 109 cells per cm3 of cell space. The cell space (1) is at least partly separated from a culture medium space (2) surrounding the cell space by means of a semi-permeable wall (3) or by an open-pore wall acting as convection barrier. The open-pore wall can be designed as a plate (7) made of a bone substitute material and constituting the bottom of the cell space (1). The cells settle on such a plate (7) and the cartilage tissue growing in the cell space (1).

Abstract: The invention shows a pistol for the pressing out of bone cement (1), comprising an attachable cement syringe (2) which has a cylinder (3) with an ejection piston (4) and a narrower neck (5) which adjoins at the cylinder (3), with a displacer bar (6) being insertable into the pistol in order to additionally eject residual cement with a second advance mechanism (8). A first piston (9) acts via a piston rod (7) on the ejection piston (4). A second piston (11), which is displaceably journalled in the piston rod (7), acts on the displacer bar (6). A fluid (10) which is under pressure is controlled via a control device (12) in such a manner that the displacer bar (6) moves relative to the first piston (9) only when the latter has reached a predetermined end position.

Abstract: A kit for a knee joint prosthesis comprises a tibia part (1, 1a), a femur part (4) and a meniscus part (3, 3a) which is to be arranged between the femur part (4) and the tibia part (1, 1a) . The kit enables the assembly of different prosthesis types, namely of prostheses in which the meniscus part (3a) is arranged to be immobile relative to the tibia part (1) and of prostheses in which the meniscus part (3) is arranged so as to be movable relative to the tibia part (1). The kit comprises a plurality of guiding elements (6, 6a, 6b) which are formed in such a manner that the respective guiding element (6, 6a, 6b) is in engagement with the tibia part (1, la) and with the meniscus part (3, 3a) when the prosthesis is assembled and determines the movability of the meniscus part (3, 3a) relative to the tibia part (1, 1a).