Patents Assigned to WALDEMAR LINK
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Patent number: 10813767Abstract: 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.Type: GrantFiled: May 8, 2013Date of Patent: October 27, 2020Assignee: WALDEMAR LINK GmbH & Co. KGInventor: Helmut D. Link
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Publication number: 20200330235Abstract: 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.Type: ApplicationFiled: October 11, 2018Publication date: October 22, 2020Applicant: Waldemar Link GmbH & Co. KGInventors: Eckhard Bauer, Helmut D. Link
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Publication number: 20200306049Abstract: 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.Type: ApplicationFiled: December 11, 2018Publication date: October 1, 2020Applicant: WALDEMAR LINK GmbH & Co. KGInventors: Helmut D. Link, Udo Borchers, Gunnar Erb
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Publication number: 20200179019Abstract: 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.Type: ApplicationFiled: March 9, 2018Publication date: June 11, 2020Applicant: Waldemar Link GmbH & Co. KGInventors: Helmut D. Link, Jan Teuber
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Patent number: 10675097Abstract: 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.Type: GrantFiled: August 28, 2015Date of Patent: June 9, 2020Assignee: Waldemar Link GmbH & Co. KGInventors: Helmut D. Link, Riccardo Signoretti
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Publication number: 20200146828Abstract: 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.Type: ApplicationFiled: March 29, 2018Publication date: May 14, 2020Applicant: Waldemar Link GmbH & Co. KGInventors: Helmut D. Link, Udo Borchers
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Publication number: 20200060832Abstract: 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.Type: ApplicationFiled: December 5, 2017Publication date: February 27, 2020Applicant: Waldemar Link GmbH & Co. KGInventor: Helmut D. Link
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Patent number: 10568748Abstract: The invention relates to a connection device for connecting a first and a second prosthesis part, in particular of a tibial and a femoral trial prosthesis for trial arrangement on the corresponding bones, wherein the connection device has a first connection element and a second connection element. The first connection element has inner walls, serving as a guide, and a mating piece and serves for arrangement on the first prosthesis part, and the second connection element is enclosed at least in part by the inner walls of the connection element and is movable in a displacement direction along the inner walls relative to the first connection element and has a groove for receiving a portion of the second prosthesis part.Type: GrantFiled: February 26, 2015Date of Patent: February 25, 2020Assignee: Waldemar Link GmbH & Co. KGInventors: Dörte Asmus, Klaus Dmuschewsky
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Publication number: 20190380789Abstract: A surgical navigation system for providing computer-aided surgery. The surgical navigation system includes a handheld surgical tool with computer-aided navigation, an imaging device, an alignment module, and a user interface module. The handheld surgical tool includes at least one sensor for measuring a position of the tool in three dimensions, and at least one set key. A processor and at least one display device are associated with the handheld surgical tool and configured to display a target trajectory of the handheld surgical tool for the surgical procedure.Type: ApplicationFiled: June 14, 2019Publication date: December 19, 2019Applicant: Waldemar Link GmbH & Co. KGInventors: Helmut D. Link, Riccardo Signoretti
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Publication number: 20190209330Abstract: The present invention relates to an implant (10) comprising an implant body having a first surface area (A1, A2, A3, A4) configured for contact with soft connective tissue and a second surface area configured for contact with bone tissue, wherein the first surface area is covered with a coating comprising tantalum and the second surface area is formed by a material, which is different than the one forming the coating.Type: ApplicationFiled: August 11, 2017Publication date: July 11, 2019Applicant: Waldemar Link GmbH & Co. KGInventor: Helmut D. Link
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Publication number: 20190099275Abstract: 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.Type: ApplicationFiled: March 6, 2017Publication date: April 4, 2019Applicant: Waldemar Link GmbH & Co. KGInventors: Helmut D. LINK, Jörg EWALD, Günther JENDRO, Andreas DÄNIKE, Udo BORCHERS
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Publication number: 20190070008Abstract: An augment device includes a hollow sleeve surrounding a channel extending through the hollow sleeve from a top to a bottom of the hollow sleeve, the hollow sleeve comprising a wall having an inner face and an outer face. The hollow sleeve includes at least one bending joint, the bending joint being configured for compressing the channel. Thereby the hollow sleeve may be compressed under an external force, leading to a decreased circumference and width of the hollow sleeve. This leads to a gap between the perimeter of the augment device and surrounding bone material, breaking any connections. By virtue of this, a much facilitated removal of the augment device can be achieved. Further, an extraction tool includes grippers for engaging and compressing the augment device, and further instruments, particularly a jig, for achieving an effective removal.Type: ApplicationFiled: June 24, 2016Publication date: March 7, 2019Applicant: WALDEMAR LINK GmbH & Co. KGInventors: Eckhard BAUER, Helmut D. LINK
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Patent number: 10194925Abstract: A medical tool system for providing a trapezoidal recess in a joint surface of a bone, including a milling tool rotatable about a tool axis and having milling edges active on the circumferential side and milling edges that are active at an axial end with respect to the tool axis, and a template part fixable to the joint surface for guiding the milling too. A stop limits a penetration depth of the milling tool. The template part has a base element with a slide guide and a slide which can be moved in the slide guide between two end stops along a guide path lying on a guide plane. A guide channel which runs diagonally to the guide plane and leads to a milling tool receiving area directed transversely to the tool axis is formed in the slide such that the milling tool can rotate freely about the tool axis.Type: GrantFiled: January 16, 2014Date of Patent: February 5, 2019Assignee: Waldemar Link GmbH & Co. KGInventor: Amos Balzarini
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Patent number: 10166029Abstract: A jig for determining a patient-adapted implant size of a femoral implant of a knee endoprosthesis. The jig has a main body, a probe part movable relative to the main body along a measuring direction. The probe part has an arm with a tip placeable on an anterior reference point of the femur's distal end, two contact pieces for placing on and referencing the medial and lateral posterior condyle of the femur's distal end, and at least one scale and pointer for indicating the probe part's position in the measuring direction relative to the contact pieces. The distance of the probe tip from the contact pieces is adjustable such that the distance is different with respect to the two contact pieces and, for each contact piece, a dedicated scale and an associated pointer are provided for the indication of the probe part's position relative to the respective contact piece.Type: GrantFiled: September 24, 2015Date of Patent: January 1, 2019Assignee: Waldemar Link GmbH & Co. KGInventor: Klaus Dmuschewsky
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Publication number: 20180221157Abstract: 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.Type: ApplicationFiled: July 27, 2016Publication date: August 9, 2018Applicant: Waldemar Link GmbH & Co. KGInventors: Helmut D. LINK, Carsten Schöttler
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Publication number: 20180214273Abstract: The present invention provides a joint implant component as well as a method for the implantation thereof. The joint implant component (1), in particular of a hip endoprosthesis, has a proximal joint section (10), a distal anchoring section (30) and a transition section (20) having a fixation structure (21) between the joint section (10) and the anchoring section (30), the fixation structure being arranged in at least one part of the perimeter of the transition section (20) as an elongate recess (22) for guiding suture material.Type: ApplicationFiled: February 2, 2018Publication date: August 2, 2018Applicant: Waldemar Link GmbH & Co. KGInventor: Helmut D. Link
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Publication number: 20180200061Abstract: 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.Type: ApplicationFiled: June 24, 2016Publication date: July 19, 2018Applicant: WALDEMAR LINK GmbH & Co. KGInventors: Eckhard BAUER, Helmut D. LINK
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Publication number: 20180193152Abstract: 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.Type: ApplicationFiled: June 24, 2016Publication date: July 12, 2018Applicant: WALDEMAR LINK GmbH & Co. KGInventor: Eckhard BAUER
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Publication number: 20180008420Abstract: 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.Type: ApplicationFiled: December 11, 2015Publication date: January 11, 2018Applicant: Waldemar Link GmbH & Co. KGInventors: Helmut LINK, Günther JENDRO, Georg GRADL
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Patent number: 9855059Abstract: A holder for a medical instrument having a quick coupling for receiving a connection end of the instrument's shaft. The quick coupling has a first coupling element having a first axial through-hole for the connection end and a second coupling element having a second axial through-hole for the connection end. The second coupling element is movable relative to the first coupling element in a direction crosswise to the axial direction of the through-holes from a locked position, in which the through-holes are offset so that an edge of the second through-hole engages behind an undercut on the shaft's connection end in a locking manner, to a release position, in which the through-holes lie in alignment and the connection end is freely guidable through both through-holes. A spring bridge connects the first and second coupling elements together and preloads the first and second coupling elements into the locked position.Type: GrantFiled: May 24, 2013Date of Patent: January 2, 2018Assignee: Waldemar Link GmbH & Co. KGInventors: Klaus Dmuschewsky, Amos Balzarini, Dörte Freisberg