Aims: To present the experience of our department in the treatment of the closed shaft tibial fractures using the unreamed nail of Orthoþx. Material- Method: Between 1991–2001 we treated 180 closed fractures. There were162 men and 18 women. The preferred method of stabilization is unreamed nailing. Results: The average follow-up was 38 months. 165 of the fractures that were treated with uiin, healed in the proper time (3–6 months). The rest of them did not have callus signs and we revised the nailing using reamed nails. No screws and nail failure was observed. Three deep venous thrombosis, healed with no further complications. 65% of our patients were able to return to their usual activities within 4 months and the rest between 4–8 months. 15 non-unions and 2 malunions occurred and were treated with correction and reamed interlocking nailing. P.W.B. allowed for fractures type A and B according AO classiþcation from the beginning. F.W.B. allowed at mean 3 months. Conclusions: Immediate stabilization of the close fractures of the tibia using uiin (Orthoþx device): advances the healing of the fractures, decreases hospitalization time, helps early return to social activities, is easier for the surgeon, easier to place the distal locking screws, requires less operative time and less radiation. We did not þnd this method inferior to reamed interlocking nailing.