The results of 194 consecutive interlocking nailings for 95 fractures in the tibia and 99 fractures in the femur with a median observation time of 22 months are presented. Three fractures were not consolidated radiologically at follow-up; three deep infections were recorded, all of which healed. Shortening greater than 1 cm was recorded in 17 fractures, rotatory malalignment greater than 5 degrees in 21, and angular malalignment greater than 5 degrees occurred in 17. The end result was excellent in 121 fractures, good in 41, fair in 28, and poor in 4.