[Management of tibial shaft fracture with an unreamed intramedullary nail. A principally changed implant].

Unreamed intramedullary tibial nailing is a "biological" method of osteosynthesis. The unreamed AO tibial nail (UTN) is an implant based on a different principle, which no longer requires tight intramedullary fitting, but, as a loose-fitting nail, does need both proximal and distal interlocking. Our experience shows that the use of the solid UTN results in a shift in indications towards fractures with traumatic soft tissue lesions. For the "classical" nailing indications, the AO universal nail continues to be used.