Abstract: The present invention relates to a femoral prosthesis component for cement-free anchoring and to a method of producing it. The prosthesis component, which can be produced by means of CAD and image-analysis methods, provides for the largest possible surface for the transmission of forces, and its mass and rigidity can be adapted to the individual properties of the bone.

Abstract: The invention relates to a hip joint prosthesis and its use in hip joint surgery. Essentially, the construction of the prosthesis is a laterally open hollow body whose cross-section (31) is horseshoe-shaped. This allows ideal adaption to the lines of load transfer. It is preferable for the prosthesis to comprise a laterally open hollow body as the stem (3), a more solid neck portion (2) and a head (1), which can be multidimensionally adjusted on the neck portion. The prosthesis can also be a complete implant with the construction of a straight-stemmed prosthesis having S-shaped mass distribution.

Abstract: The invention relates to a one-piece or multipiece application system for applying plastic masses out of a receptacle. The application system (10) comprises a funnel-shaped outlet piece (16) adapted to the receptacle and an elongate application part (30), wherein along the inner surfaces of all parts of the application system no shoulder is formed which could impair the application of the plastic mass.

Abstract: The invention relates to a filter with a predeterminably adjustable porosity. The filter can be manufactured by forming a three-dimensional framework made of the filter material around particles, which serve as space retainers for the porosity, and subsequently removing the particles. The filter according to the invention consists of biologically inert material which does not harm the mucous membrane. When used as a nose filter, the filter keeps the breathing air free of particles and harmful gases.

Abstract: The present invention relates to a device for sealing an opened tubular bone, a bone foramen, an osteotomy surface, a bone fenestra or a fracture line. The present invention proposes an elastic membrane (10) which is positioned over the end of a bone and/or pressed against the bone, such that a vacuum can advantageously be generated within the bone.

Abstract: The invention relates to a hip joint prosthesis and its use in hip joint surgery. Essentially, the construction of the prosthesis is a laterally open hollow body whose cross-section (31) is horseshoe-shaped. This allows ideal adaption to the lines of load transfer. It is preferable for the prosthesis to comprise a laterally open hollow body as the stem (3), a more solid neck portion (2) and a head (1), which can be multidimensionally adjusted on the neck portion. The prosthesis can also be a complete implant with the construction of a straight-stemmed prosthesis having S-shaped mass distribution. (FIG. 1).

Abstract: The invention relates to a mixing apparatus comprising a mixing bowl (10) and a lid (70) for vacuum-sealing the mixing bowl (10), which lid is provided with a passage (84) for a mixing rod. The lid (70) is relatively rigid in the axial direction of the mixing bowl (10), whereas at least the portion of the lid (70) which surrounds the passage (84) is radially movable. (FIG. 3.

Abstract: The invention relates to a material in the form of a three-dimensional conglomerate of polymer particles which is used as a starting material for the preparation of bone cement. The conglomerate is a solid with a uniform pore system and is prepared by bonding the polymer particles to one another at their points of contact or connecting them at their surfaces. After addition of the monomer the material is prepared to a self-curing bone cement and mixed.

Abstract: The present invention relates to a prosthesis component for anchoring with or without using bone cement and to a method of producing it. The prosthesis component, which can be produced by CAD and image-analysis methods, provides for the largest possible surface for the transmission of forces, and its mass and rigidity can be adapted to the individual properties of the bone.

Abstract: The invention relates to a bone replacement material consisting of a three-dimensional supporting framework of elementary bodies connected to one another and surrounding defined spaces, and a coating mass of fillers (based on strong calcium compounds) and a binding substance (matrix). The binding substance and the fillers are absorbable and the fillers are highly porous spherical particles with a diameter of between 15 and 50 .mu.m and a pore volume of between 50 to 80%, to which some filamentous material can be added.The bone replacement material of the invention is suited to produce coatings for prostheses, thus serving as an anchoring part for prostheses. It can also be used as a complete implant.

Abstract: The invention relates to a device for sealing the medullary cavity of a bone during the application of bone cement. The device comprises an elastic bottom portion (10) for positive contact with the bone around the medullary cavity and a rigid top portion (30). When the bone cement cartridge (40) is pushed down, the rigid top portion (30) presses the bottom portion (10) against the bone, and the medullary cavity is sealed in a vacuum-tight manner. The device according to the invention makes it easier to fill the medullary cavity with bone cement under vacuum and to carry out drainage at the same time. (FIG. 1).

Abstract: The invention relates to a surgical support or network for anchoring endoprostheses and/or reinforcing the bone cement used for anchoring endoprostheses. The support or network is designed as a prestressable prosthesis quiver (1) made of one or more layers of threads so that when prestressed, for example by means of a bone dowel (2) and a titanium cap (6), it can be anchored in the bony bed.

Abstract: The invention relates to a mixing apparatus comprising a mixing bowl and a lid for vacuum-sealing the mixing bowl, which lid is provided with a passage for a mixing rod. The lid is relatively rigid in the axial direction of the mixing bowl, whereas at least the portion of the lid which surrounds the passage is radially movable.

Abstract: The invention relates to a bone screw (10) which can be anchored in the bone in a firm and vacuum-tight manner, and to the use of the same in arthroplastic surgery and as a drug delivery system. The interior of the bone screw (10) has a continous longitudinal bore (15) through which the medullary canal can be evacuated during the application of bone cement. The use of the bone screw renders it possible to fill the spongiosa honeycombs with bone cement without endangering the life of the patient.

Abstract: The invention relates to an implant (10) to sheath and/or reinforce bone and/or to anchor bone screws. The implant (10) takes the shape of a dowel which is capable of spreading and/or swelling and/or interlocking in bone in some other way. The implant (10) preferably presents ring-like bulges (16) on its outer surface and an internal screw thread (20) on its inner surface to screw in bone screws. Implant (10) improves the tensile strength when anchoring bone screws (Figure 1).

Abstract: The invention relates to a bone screw (10) which can be anchored in the bone in a firm and vacuum-tight manner, and to the use of the same in arthroplastic surgery and as a drug delivery system. The interior of the bone screw (10) has a continuous longitudinal bore (15) through which the medullary canal can be evacuated during the application of bone cement. The use of the bone screw renders it possible to fill the spongiosa honeycombs with bone cement without endangering the life of the patient.

Abstract: The invention relates to an apparatus and a process for mixing a compound comprising at least two components and especially to an apparatus and a process for mixing bone cement and filling it into an applicator (130). The apparatus comprises a mixing bowl (100) and a sealing means (140) which can be connected to the applicator (130). The applicator (130) can be moved within the mixing bowl (100) relative thereto. Due to the relative motion of the applicator (130) and the mixing bowl (100), the bone cement is mixed and filled into the applicator (130).

Abstract: The invention relates to an evacuatable bone cement syringe comprising a container (8) for receiving the bone cement prior to its application, and comprising a pressure generating apparatus for precompressing the bone cement in the container (8). A bell (100) comprising a vacuum tube (110) is placed over the container (8) and held in place by a flange (105) so that the gases which escape during the process of precompression can be sucked off. In this way it is possible to reduce the porosity of the bone cement which is being applied.

Abstract: The invention relates to a bone-grinding instrument, in which the grinding head is joined, releasably via a coupling, to a driving part, wherein the grinding head is designed as a hollow cylinder with a rounded end face and is provided on the outer and/or inner wall with an abrasive coating having a particle size between 30 and 300 .mu.m, and to a hollow removal cylinder which is to be used together with this bone-grinding instrument. In place of an abrasive coating, this hollow removal cylinder has barbs, which penetrate into the bone core.

Abstract: Particles of absorbable filler based on tricalcium phosphate having a particle size between 50 and 300 .mu.m, which predominantly have an approximately spherical shape, are used in materials for implantation, which are based on polyacrylates, for the management of bone defects.