Patent ID: 8118810

Claim:
An implantation system for a bone stabilizing implant comprising: a bone stabilizing implant having a body portion with a plurality of through holes for anchoring the implant to part of a bone by means of fastening elements and a contour portion having a central opening therein, wherein the central opening is a through hole, and at least one groove having a bottom surface; an aiming device for detachable attachment to the implant; and an adaptor for establishing a spatial orientation between the implant and the aiming device, the adaptor having a form-fit connector at one end thereof for engaging a first groove of the at least one groove on the counter portion, wherein the form-fit connector includes a first protrusion corresponding in shape to the groove for engaging the bottom surface of the first groove; wherein the contour portion comprises a second and a third groove each spaced and angularly offset from the first groove and each having a bottom surface, wherein the first, second and third grooves are arranged in an asymmetric manner with respect to the central opening with at least one angle of an angle between the first and second grooves, an angle between the first and third grooves and an angle between the second and third grooves being unequal to the other two angles, and said adaptor form-fit connector has two further protrusions each for engaging a groove bottom surface of the second and third grooves, so that the aiming device and the implant can be mechanically connected to each other only in one predefined relative angular orientation.