Abstract: An augment device for a joint endoprosthesis, the device including a sleeve surrounding a channel extending through the sleeve. The sleeve is formed of porous material for ingrowth of bony material, the sleeve comprising an inner face and an outer face. The sleeve further comprises a wall surrounding the channel, the wall being made of solid material and forming a sandwich structure with the porous material, wherein the wall forms a bulkhead between the inner face and the outer face. Thereby, the bulkhead wall will stop inflow of any cement across the sleeve from its inner to its outer face. The porous material on the outer face will be kept free from cement and its capability to promote bone ingrowth is reliably preserved. The augment devices are preferably provided as a set having different sizes and straight or stepped bottoms for improved versatility and maximum preservation of natural bone matter.

Abstract: The invention relates to a connecting sleeve for anchoring shafts of two oppositely arranged prostheses, preferably on an elongate bone such as a femur or humerus. The reinforcing sleeve comprises two receiving bushes (1, 2) for one prosthesis shaft each and comprises a separable coupling region (3) arranged therebetween for connection in such a manner as to resist shear forces and rotation. According to the invention, each receiving bush (1, 2) has, on the side thereof facing the coupling region, one fork (31, 32) of a pair of forks that interact with each other, and a fitting block (4) is arranged on a base of the fork, the lateral surfaces (44) of which fitting block have a distance that corresponds to an inner width of the fork, and the lateral surfaces (44) are designed to contact flanks of the fork in a planar manner, at least one fastening screw (5) being arranged transversely through the fork. The fork connection is simpler to produce than the known wedge connection and yet is sufficiently robust.

Abstract: The present invention provides a method for treating a polymer workpiece (1) for use in a joint implant. It comprises the steps of placing the polymer workpiece in an explosion chamber, introducing a combustible gas mixture into the explosion chamber and igniting the combustible gas mixture. Igniting the gas mixture in the explosion chamber produces a temperature that lies above the melting point of a polymer of the polymer workpiece.

Abstract: The invention relates to an arthrodesis plate for the stiffening of joints, in particular finger joints, comprising a proximal and distal anchoring region which are connected to one another in a mechanically rigid manner, characterised in that at least one outer contour of one of the two anchoring regions has a cross-section which is undulating, for example roof-shaped, or is provided with alternating crests and troughs by means of coating, and/or has a transversal-sagittal cross-section.

Abstract: A knee joint endoprosthesis set comprising modular knee joint endoprostheses in different sizes. Each knee joint endoprosthesis comprises a tibial component (2). The femoral component (3) comprises a joint element for articulated cooperation with the tibial component and comprises a shaft (5) for anchoring in the femur. The set comprises shafts in different sizes. In the femoral component (3), the shape of the shafts tapers from a distal end (51), facing toward the joint element, to a proximal free end (52) of the shaft. An oval cross section is provided at the distal end (51), and a round cross section is provided at the proximal free end (52) of the shaft. An ovality defined by the oval cross section increases as the size of the shafts increases. The different sizes are preferably graded according to the ovality. The set permits excellent adaptation to the particular medullary canal by means of the different sizes.

Abstract: The invention relates to a revision prosthesis shaft of a revision joint endoprosthesis for anchoring in an elongate bone (9), in particular femur. The surface is designed for adhesive agent-free fastening in the proximal epimetaphysis (91) and the diaphysis (92) of the bone. According to the invention, a distal epimetaphyseal extension (2) is provided at the far end of the shaft (12), the tip of which extension reaches into the distal epimetaphysis (93) of the bone. The extension (2) is designed for fastening in the distal epimetaphysis (93) by means of an adhesive agent (3), in particular bone cement. The invention combines the advantages of cement-free fastening, namely of the shaft in itself in the diaphysis (92), with the advantages of cemented fastening, namely of the extension in the distal epimetaphysis (93). Even in difficult cases in which sufficient hold previously could not be achieved for lack of fastening distance in the diaphysis, stable anchoring can thus be achieved.

Abstract: The present invention discloses an intermediate segment (20) for arrangement between a concave implantation surface (14) of a joint component (10), particularly a femoral prosthesis, and bone tissue. The intermediate segment (20) comprises an intermediate segment body (23) with at least one side (24, 25) facing the joint component (10), wherein one (24) of the at least one side facing the joint component is convex. In addition, the intermediate segment (20) comprises a locking mechanism for attaching the intermediate segment to the joint component with at least a first (21) and a second (32) latching element, wherein at least one of the latching elements (21, 32) is movable. The present invention also relates to a joint component (10) comprising an intermediate segment (20) and a method for securing an intermediate segment (20) to a joint component (10).

Abstract: A bone implant includes a body having a porous structure and having a size and shape configured for fitting to a bone, preferably in a bone defect. The porous structure is comprised of regularly arranged elementary cells whose interior spaces form interconnected pores, the elementary cells are formed by basic elements arranged in layers, wherein the basic elements are shaped like tetrapods, the tetrapods in each layer being arranged in parallel orientation and being positioned in-layer rotated with respect to tetrapods of an adjacent layer. The layers with rotated and non-rotated tetrapods are alternatingly arranged. Thereby a porous structure can be achieved which features improved mechanical characteristics, leading to improved biocompatibility.

Abstract: A coating for an implant component, in particular a component of a spinal implant, is provided. The coating is a ceramic titanium nitride coating comprising an at % content of 5 to 30 At % of Ag in addition to an at % content of Ti and an at % content of N.

Abstract: A joint configuration is proposed for a joint endoprosthesis forming a hinge joint, comprising a joint receptacle, which has a joint receptacle surface and a receptacle locking structure, and a joint body, which is receivable in the joint receptacle and has a joint body surface and a body locking structure. The joint receptacle surface and the joint body surface are movable in relation to one another into a position in which the receptacle locking structure and the body locking structure assume a locked position, in which they can be engaged for a locked state between the joint receptacle and the joint body.

Abstract: The present invention provides an active substance application insert (10, 110) for an implant (30), in particular a joint implant. The active substance application insert has a main body (11), an active substance chamber (12) formed in the main body, an application side (13, 113) which forms a front face of the active substance chamber, wherein the application side has a plurality of application openings (14, 114), and a securing means (15) with which the main body can be detachably secured in the implant. In a state in which the main body is inserted into the implant, the application side faces outwards relative to the implant, such that the application openings connect the active substance chamber to the environment of the implant. Furthermore, within the scope of the present invention an implant (30) with a recess (31) for receiving an active substance application insert (10, 110) is provided.

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: The invention relates to a fastening element for preventing unwanted release of a connection between the fastening element and a counter-piece. The fastening element is designed to come into engagement with the counter-piece through a rotary movement of the fastening element about an axis of rotation in a connection direction. Such fastening elements are suitable for use in a wide range of technical fields, for example the automotive industry, household electronics and medical technology, in particular in the field of instruments for implants or prostheses and modular systems of implants or prostheses.

Abstract: A reinforcing implant anchors shafts of two prostheses which are arranged opposite each other on an elongated bone, in particular a femur. The implant has a generally elongated shaft-like shape and a receiving sleeve at both ends for a respective anchoring shaft and a disconnectable coupling piece lying between the receiving sleeves for a rigid connection. In this manner, a force bridge is formed between the two anchoring shafts so that the bone is no longer subjected to the force transmission in particular in the sensitive intermediate region between the two anchoring shafts.

Abstract: Implantable drug-eluting device (1) comprising a microporous structure (2) having regularly arranged pores (4, 5) in at least two different uniform sizes, and manufacturing method. The pores are configured for receiving a drug (9) and are being connected by interconnections (6, 7). Interconnections (6) originating from pores (4) of a first size have a first elution area and interconnections (7) originating from pores (5) of a second size have a second elution area. The interconnections convey the drug (9) to a surface of the device for elution to surrounding tissue. The ratio between the first and the second elution areas is predefined and selectable. The differently sized elution areas provide for different outflow rates. This allows for simple but reliable dispensing of drugs at positively controlled and well determined rates. Particularly, this enables a single implantable device to dispense drugs over preselectable durations of time, like short-term or long-term.

Abstract: The invention relates to an endoprosthesis shaft system for elongate bones, comprising an anchoring part (10) and a shaft (1), which is formed from module elements that can be coupled by means of a plug-in connection (45), wherein a mutual rotation of the elements along the shaft (1) is adjustable and is blocked by means of an anti-rotation mechanism. In order to adjust the rotation, a rotation piece (5) is provided as a further module element, which has a self-contained rotation adjustment device (6) and a clamping device (7) as a mechanism for blocking the rotation. The rotation piece (5) comprises two end faces for the plug-in connection (45) and a sleeve (77). The invention provides, with the rotation piece, a particular module element for the shaft, which as a structural unit allows both an adjustment of the rotation and a blocking against undesired rotation in a self-contained unit.

Abstract: The invention relates to an arthrodesis plate for the stiffening of joints, in particular finger joints, comprising a proximal and distal anchoring region which are connected to one another in a mechanically rigid manner, characterised in that at least one outer contour of one of the two anchoring regions has a cross-section which is undulating, for example roof-shaped, or is provided with alternating crests and troughs by means of coating, and/or has a transversal-sagittal cross-section.

Abstract: A handheld surgical tool includes a handle, an instrument shaft, and a navigation device, which includes at least one sensor unit for sensing positional data, a computing unit configured to determine a position in space based on signals of the sensor unit, at least one set key and a position memory configured to store a data set for a position upon activation of the at least one set key. A comparator is operatively connected to the position memory for comparing an actual position against a stored position in at least two different operation modes and for generation of a deviation signal, wherein operation modes differ in that a first mode is configured for a reduced comparison only which lacks at least one spatial dimension. A feedback device is provided supplied with the deviation signal and being configured to indicate direction and preferably magnitude of any deviation.

Abstract: The invention relates to a connecting sleeve for anchoring shafts of two oppositely arranged prostheses, preferably on an elongate bone such as a femur or humerus. The reinforcing sleeve comprises two receiving bushes (1, 2) for one prosthesis shaft each and comprises a separable coupling region (3) arranged therebetween for connection in such a manner as to resist shear forces and rotation. According to the invention, each receiving bush (1, 2) has, on the side thereof facing the coupling region, one fork (31, 32) of a pair of forks that interact with each other, and a fitting block (4) is arranged on a base of the fork, the lateral surfaces (44) of which fitting block have a distance that corresponds to an inner width of the fork, and the lateral surfaces (44) are designed to contact flanks of the fork in a planar manner, at least one fastening screw (5) being arranged transversely through the fork. The fork connection is simpler to produce than the known wedge connection and yet is sufficiently robust.

Abstract: The invention relates to a revision prosthesis shaft of a revision joint endoprosthesis for anchoring in an elongate bone (9), in particular femur. The surface is designed for adhesive agent-free fastening in the proximal epimetaphysis (91) and the diaphysis (92) of the bone. According to the invention, a distal epimetaphyseal extension (2) is provided at the far end of the shaft (12), the tip of which extension reaches into the distal epimetaphysis (93) of the bone. The extension (2) is designed for fastening in the distal epimetaphysis (93) by means of an adhesive agent (3), in particular bone cement. The invention combines the advantages of cement-free fastening, namely of the shaft in itself in the diaphysis (92), with the advantages of cemented fastening, namely of the extension in the distal epimetaphysis (93). Even in difficult cases in which sufficient hold previously could not be achieved for lack of fastening distance in the diaphysis, stable anchoring can thus be achieved.