Distraction device
AssigneeWittenstein AG
InventorManfred Wittenstein
Life of this patent
Estimating the term…
Abstract
A distraction device for moving a one-part or two-part or separated bone apart in order to extend or bridge a bone gap. The device is optionally provided in the form of an intramedullary pin, which can be inserted into a medullary space of a bone and which has at least two elements that can be axially moved in relation to one another. The first element is joined to the second element via at least one detent device for securing a distraction movement, and a pushing module for distracting the first element is assigned to the second element and is joined to the second element in a manner that enables it to be locked.
Claims10
A distraction device for bridging a bone gap, comprises at least two elements movable relative to one another, wherein the first element (1) is connected to the second element (2) by at least one detent means (3) for securing a distraction movement, and the second element (2) is assigned a pusher module means (12) for distraction of the first element (1) , which is connected to the second element (2) so as to permit locking, a spring element (16) is provided between the pusher module means (12) and the second element (2) and exerts pressure on the pusher module means (12), wherein, in order to move the pusher module means (12) back and to tension the spring element (16) between pusher module (12) and second element (2), a compression rod (9) is provided, together with an actuating device (11) interposed between the compression rod (9) and the push module means (12), the actuating device (11) comprises at least one shape-memory element (17.1, 17.2) and a heating device (18.1, 18.2).
Dependencies are inferred from the claim text.