Antonelli, Terry, Stout, & Kraus, LLP
Endoprosthesis cutting-off device
 Disclosed is a device for removing a prosthesis having a shaft engaged in a bone cavity. The device includes an elongated chisel blade having a cutting edge at its front end, and slidably disposed and longitudinally supported by a body and extending beyond a front face of the body. A driving-in member which, e.g., can be impacted by a hammer is removably coupled to the chisel blade and has an engaging pin attached thereto, the body having a free space for accepting this engaging pin, which engaging pin can extend through at least one engaging point in the chisel blade, so as to provide the chisel blade stably attached to the body while being easily removable therefrom. Various blades, of different thicknesses, can be utilized as part of the device. The body can have at least one circumferential rib to facilitate holding the device, and can have a handle extending in a direction perpendicular to the direction that the chisel blade extends. The driving-in member can include an impact collar, which can have an impact plate thereon, to be impacted by a hammer. Through use of the device of the present invention, a prosthesis can be removed simply and with little force, while causing as little trauma as possible. 
Ueth & Haug GmbH
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A61B A61F A61F A61F A61B A61F A61F A61B A61N B25D A61F A61F A61B A61B A61B A61B A61B
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Matthias Clemens Thorsten
Grothues-Spork Scholz Ahrens