Waldemar Link Gmbh &Co. Kg

Gunnar Erb

Helmut D Link

Udo Borchers

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

Combination of augment and replacement piece for filling a bone defect

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.

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Hamburg, Germany

Gunnar Erb