Method and implant for stabilizing two bone portions separated by a cut or fracture
In a human or animal patient, two bone portions separated by a cut or fracture are stabilized in a desired position relative to each other by bringing the two bone portions into this desired position, by pulling them against each other, by providing an opening having a mouth on a bone surface and reaching across the cut or fracture and walls in both bone portions, by inserting an implant into the opening and anchoring the implant in the walls of the opening with the aid of a material having thermoplastic properties and energy transmitted into the implant for in situ liquefaction of at least part of the material having thermoplastic properties. One exemplary application of the stabilizing procedure concerns the two tibial bone portions separated by tibial plateau leveling osteotomy in a canine patient suffering from cranial cruciate ligament damage or rupture in a stifle joint.
1. A set of tools for stabilizing two bone portions separated by a cut or fracture in a human or animal patient, the set of tools comprising an implantation tool and mounted or mountable to the implantation tool an implant, wherein the implant comprises a plurality of anchoring pins and at least one bridge portion connecting proximal ends of the anchoring pins and wherein a material having thermoplastic properties is arranged on lateral surfaces of the anchoring pins or in a perforated sheath of at least one anchoring pin, wherein said lateral surfaces of the anchoring pins or said perforated sheath is arranged on the implant for being in contact with bone tissue on implantation, wherein the set of tools further comprises a fixation/guide tool comprising an axial tunnel and resilient outwards flaring distal half portions with distal faces equipped for fixation on a bone surface, wherein the distal half portions flare outwards with respect to a longitudinal axis of the fixation/guide tool.
2. The set of tools according to claim 1 and further comprising means for forcing the distal half portions against each other and locking the distal half portions in a position.
3. The set of tools according to claim 1 and further comprising at least one of a cut finder, a drill guide and a corresponding drill, a cutter guide and a corresponding cutter, the cut finder, the drill guide and the cutter guide having cross sections adapted to a cross section of the axial tunnel of the fixation/guide tool such that the cut finder, the drill guide and the cutter guide can be introduced into the axial tunnel.