System and method of navigation-guided osteotomy

A system of attachment of a first bony segment in relation with a second bony segment, both segments belonging to a same bone, wherein the system comprises:

• two trackers, each tracker being configured for attaching to a respective segment prior to said segments being maintained together by a hinge to be formed by a partial cut of said bone;
• a navigation system adapted to acquire three-dimensional positions and orientations of said trackers;
• a processing system adapted to compute, from the data given by said navigation system, three dimensional alignment angles of the two said segments;
• a display unit adapted to show information to the surgeon;
• reaming guides of different sizes, wherein each reaming guide defines a bone volume to be removed from each segment on both sides of the hinge;
• implants of different sizes, wherein a shape of each implant coincides with a shape of the bone volume defined by a correspondingly sized one of said reaming guides, said implant being configured to be inserted into a global volume comprising the bone volumes removed from each segment and a distraction volume separating said bone volumes;
• two bases, each configured to be attached to a respective segment on both sides of the hinge;
• said reaming guides configured to be fixed to each of both bases over the hinge.