WALDEMAR LINK GmbH & Co. KG

The present disclosure includes a flexible stem of a medical implant for implantation into a bone. The stem includes a stem shaft having a first stem shaft end and a second stem shaft end; and a plurality of projections, each of the plurality of projections having a first projection end and a second projection end, wherein the first projection end of each of the plurality of projections is connected to the stem shaft.

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.

A prosthesis or implant device for use in joint or bone repair, or restoration of function, with improved surface hardness and depth of hardness and a process comprising treating a biocompatible alloy such that hardness and depth of hardness is improved.

An extracorporeally length-adjustable implant system comprises an implant component to be fastened to a bone to be lengthened and an adjustment device with two fastening parts that are displaceable relative to one another, each of which is intended for arrangement at a part of the bone to be lengthened, wherein the adjustment device is able to distract the two fastening parts and comprises a drive element with a permanent magnet arranged in rotationally fashion and a mechanism which converts a rotational movement of the permanent magnet into a distracting longitudinal movement of the adjustment device; and an extracorporeal drive unit for the drive element of the implant component. The extracorporeal drive unit comprises a rotatably mounted extracorporeal magnetic ring with an interior to receive the bone to be lengthened with the adjustment device, and an actuation device to rotate the extracorporeal magnetic ring in the ring plane thereof.

Graft for a bone defect, in particular a tibial head graft for a knee-joint endoprosthesis. It comprises a sleeve-like inner body ( 2 ) for implantation at one end of a long bone ( 99 ). An outer face of the inner body ( 2 ) is designed as a bone contact face ( 20 ) for bearing on the surrounding bone margin ( 97 ). According to the invention, an outer shell piece ( 3 ) is provided which, as a bone replacement piece, is doubled onto the outside of the inner body ( 2 ) for filling a defect at the cortical bone margin ( 97 ) and is not dimensioned peripherally, such that, in the circumferential direction, it covers only a part of the outer circumference of the inner body ( 2 ). The doubled outer shell piece ( 3 ) forms a filler piece for a bone defect (bone window 96 ) at the bone end. Closure of the bone window ( 96 ) is achieved, and unwanted contact between the graft and surrounding soft-tissue parts is avoided. Moreover, the graft is thus also supported in the region of the bone window ( 96 ). Parts of the bone margin ( 97 ) that are still present can thus remain intact, allowing the greatest possible preservation of naturally present bone substance.

A humeral implant component connectable to another humeral implant component, the humeral implant component comprising: a longitudinal axis, a first end and a second end, the first end and the second end opposing each other along the longitudinal axis of the humeral implant component, and an interface part for connecting the humeral implant component to the other humeral implant component, wherein the interface part is tapered along the longitudinal axis in a direction from the second end to the first end, the interface part being engageable with a tapered interface part of the other humeral implant component to form a tapered connection between the humeral implant component and the other humeral implant component, wherein the humeral implant component further comprises a through hole extending along the longitudinal axis for locking the tapered connection by a longitudinal fastener.

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 for one prosthesis shaft each and comprises a separable coupling region arranged therebetween for connection in such a manner as to resist shear forces and rotation. According to the invention, each receiving bush has, on the side thereof facing the coupling region, one fork of a pair of forks that interact with each other, and a fitting block is arranged on a base of the fork, the lateral surfaces of which fitting block have a distance that corresponds to an inner width of the fork, and the lateral surfaces are designed to contact flanks of the fork in a planar manner, at least one fastening screw being arranged transversely through the fork. The fork connection is simpler to produce than the known wedge connection and yet is sufficiently robust. Unlike in the case of the wedge connection, an exact fit is not required; a clearance fit between the fork and the fitting block is sufficient in principle, excessive play being eliminated by means of the fastening screw.

Graft for a bone defect, in particular a tibial head graft for a knee-joint endoprosthesis. It comprises a sleeve-like inner body ( 2 ) for implantation at one end of a long bone ( 99 ). An outer face of the inner body ( 2 ) is designed as a bone contact face ( 20 ) for bearing on the surrounding bone margin ( 97 ). According to the invention, an outer shell piece ( 3 ) is provided which, as a bone replacement piece, is doubled onto the outside of the inner body ( 2 ) for filling a defect at the cortical bone margin ( 97 ) and is not dimensioned peripherally, such that, in the circumferential direction, it covers only a part of the outer circumference of the inner body ( 2 ). The doubled outer shell piece ( 3 ) forms a filler piece for a bone defect (bone window 96 ) at the bone end. Closure of the bone window ( 96 ) is achieved, and unwanted contact between the graft and surrounding soft-tissue parts is avoided. Moreover, the graft is thus also supported in the region of the bone window ( 96 ). Parts of the bone margin ( 97 ) that are still present can thus remain intact, allowing the greatest possible preservation of naturally present bone substance.

Modular endoprosthesis for at least partial replacement of a tubular bone, including, as module components, a stem for insertion into a bone cavity of the tubular bone, and an end piece including a support body with a neck part arranged on the medial aspect thereof. The module components being able to be coupled to each other and released from each other along a longitudinal axis of the shaft. The end piece has at least two different surface configurations on its support body, namely a closed surface ( 6 ′) on a medial aspect, and a porous configuration of the surface on the opposite, lateral aspect. The latter permits and positions the adhesion of muscle tissue, specifically without suturing. The muscle trauma caused by suturing, and the peak loads that occur at the respective suture points, can thus be avoided by virtue of the invention.

A trial neck piece for a joint endoprosthesis is designed for temporary arrangement on a separate shaft body ( 60 ) that is insertable into a tubular bone ( 9 ). It comprises a fastening region ( 12 ) which can be plugged temporarily onto a head part ( 61 ) of the shaft body ( 60 ) by means of a plug connection (l l), and a neck region (IO) for receiving a joint element ( 19 ) of the joint endoprosthesis. The trial neck piece (I) is designed as a separate, plug-on attachment piece which, with its fastening region ( 12 ), can be plugged with form-fit engagement onto the head part ( 61 ) and locked. A latching device ( 2 ) is provided which comprises a plurality of latching stages for different height stages of the trial neck piece (I). The invention thus makes available an easily attachable trial neck piece which can be arranged in a defined manner in different height positions in order, on the one hand, to obtain a secure and defined arrangement and, on the other hand, to permit the setting of different heights. The invention further relates to an arrangement with a trial neck piece and with an excavating tool, in particular a reamer, and to an instrument set comprising a trial neck piece and an insertion instrument.