Waldemar Link Gmbh &co. Kg

Udo Borchers

Helmut D Link

Gunnar Erb

Günther Jendro

Andreas Dänike

Jörg Ewald

The invention relates to an endoprosthesis shaft system for elongate bones, comprising an anchoring part and a shaft, which is formed from module elements that can be coupled by means of a plug-in connection, wherein a mutual rotation of the elements along the shaft is adjustable and is blocked by means of an anti-rotation mechanism. In order to adjust the rotation, a rotation piece is provided as a further module element, which has a self-contained rotation adjustment device and a clamping device as a mechanism for blocking the rotation. The rotation piece comprises two end faces for the plug-in connection and a sleeve. 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.

Modular endoprosthesis shaft system with rotation element

The invention relates to an endoprosthesis shaft system for elongate bones, comprising an anchoring part () and a shaft (), which is formed from module elements that can be coupled by means of a plug-in connection (), wherein a mutual rotation of the elements along the shaft () is adjustable and is blocked by means of an anti-rotation mechanism. In order to adjust the rotation, a rotation piece () is provided as a further module element, which has a self-contained rotation adjustment device () and a clamping device () as a mechanism for blocking the rotation. The rotation piece () comprises two end faces for the plug-in connection () and a sleeve (). 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.

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 ().

Connecting sleeve for anchoring shafts of two oppositely arranged prostheses

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.

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Norderstedt, Germany

Udo Borchers