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Purpose: Vascular complications associated with locked intramedullary tibial nailing are rare but always serious. The purpose of this cadaveric study is to deþne the risk of vascular complications after proximal locking in intramedullary tibial nailing. Methods: Seven fresh cadaver legs were obtained from the University Hospital of Ioannina. The Grosse &
Kempf Tibial Locking Nail was used with anterior-posterior locking. Each procedure was performed according to a standard protocol. The insertion point of the tibial nail was just above the level of the tibial tuberosity. The direction of the proximal locking screw was oblique from caudal to cranial and from lateral to medial. For imaging, both the nail and screws were removed and titanium screws were inserted, thereby allowing good visualization. Results: MRI sections combined with CT and 3D-CT have been used to illustrate the þndings, as they clearly demonstrate the relationships between the locking screws and adjacent vascular structures. Analysis of these þndings highlighted the surgical risks associated with this type of proximal locking and its direction. Conclusions: Proximal anteriorposterior locking in intramedullary tibial nailing is a hazardous procedure because of the small distance between tibia and vascular structures. The use of a new direction for proximal anterior-posterior locking is recommended as an alternative procedure to eliminate the potential for iatrogenic lesions.