Depuy Synthes Products, Inc.

Ao Technology Ag

Synthes Gmbh

Norbert Suhm

Markus Hänni

Peter Toggwiler

Ronald Schwyn

Armando Gisep

Vanessa Boner

Markus Haenni

The invention relates to an aiming device () for the placement of Kirschner-wires in orthopedics/traumatology. The aiming device () comprises an adjustable aiming block () which is displaceably attached to a forceps (). The fixation of the aiming device at the bone () can be varied by clamping the forceps () more or less strongly. The aiming block () can be displaced to the periost () and be fixed. The aiming device () according to the invention allows the alignment of the guidance () of the Kirschner-wire () about an axis of rotation (). Before the Kirschner-wire () is inserted in the bone () its position and direction can be intraoperatively represented and aligned in at least two non-parallel planes of projection (P, P) by means of fluoroscopy and/or navigation. Repeated drilling and mistaken positioning of the Kirschner-wire () can so be avoided. Thus, allowing to reduce the time of operation and the exposure of the patient to radiation.

Aiming device

An aiming device for insertion of a Kirschner-wire to treat a target bone, comprises an aiming block permitting placement of a Kirschner-wire against the target bone and a forceps connected to the aiming block, the forceps being configured to clamp to the target bone.

A cannula () comprising A) a central axis (), a front end (), a rear end () and a channel () coaxial or parallel to said central axis () and defining a peripheral wall () of said cannula (); B) referencing means () at said rear end (), so that said cannula () can be brought in a desired position relative to a cavity () in a bone; wherein C) said cannula () further comprises at least two perforations () penetrating said peripheral wall () transversely to said central axis (); and D) said at least two perforations () are arranged in a portion () of said peripheral wall () which extends over an arc () orthogonal to said central axis () with a central angle &#x3b1;&#x3c;270&#xb0;. A method for applying bone cement into a bone structure comprising the steps of: A) selecting at least one region in a bone where the trabecular bone structure is to be augmented; B) producing at least one cavity () communicating with said at least one bone region; C) applying a fluid jet lavage towards said at least one bone region, and D) providing bone cement to said at least one bone region.

Cannula

Method and device for determining the local mechanical resistance inside of a porous body having a variable density and/or porosity, in particular inside of a porous bone structure comprising the following steps:

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Davos Wolfgang, Switzerland

Norbert Suhm