We reviewed 3 cases with humeral shaft fracture treated with TRUE FLEX. All 3 cases were female, with a mean age of 50 years at the time of surgery. According to AO classification, the cases were a 12-A3 fracture, a 12-B2 fracture (delayed union), and a 12-C1 fracture. All were closed fractures. None showed neurological nor vascular complications. ROM exercise began 1 week after postoperative fixation.
All the cases achieved good bone union. 2 out of the 3 cases showed no limitation of motion in the shoulder and elbow joints, while the third case had limitation of motion in the shoulder joint, possibly due to insufficient insertion of the rod cap. In conclusion, TRUE FLEX which achieves bone union without the use of interlocking screws, is an effective device for the fixation of fractures.