20 cases of tibial fracture were treated with new tibial Blocker interlocking nail system from Apr.1990. to Mar. 1991. The Blocker tibial nail is suited for both reamed and unlearned application.

Obviously, the blood supply is injured with any nail insertion, but because of its unique square design, significant cross-sectional areas are left open to permit rapid reestablishment of the intramedullary circulation.

As for using the Brooker nalis for fractures of distal 1/3 of the tibia, 2 fins prevent rotation while providing optimal fracture stabiliaation. Additionally, the nail provides strong 2 fins for distal fixation, and the danger of radiational damage is decreased due to less O.R. time.

13 of 20 cases were followed up more than 1 year. The time for radiological union was average 16 weeks without rotational deformity or nonunion.

Of the patients with 20 cases, one had a proximal screw breakage ; one, mild knee joint pain ; and one, distal fin protrusion.