交锁髓内钉在治疗股骨干缺损性骨不连中的应用

目的 分析股骨干缺损性骨不连的原因，探讨交锁髓内钉植骨固定治疗股骨干缺损性骨不连短肢畸形的优缺点。方法 采用交锁髓内钉固定，自体髂骨充填骨缺损区的术式治疗股骨干骨不连短肢畸形12例，病例随访平均20个月。结果 12例全部一期愈合，平均愈合时间22个月。肢体延长平均3．2cm。无主钉、锁钉弯曲、折断等内固定失败。结论 股骨干缺损性骨不连的主要原因是骨折固定不牢固造成骨吸收所致。交锁髓内钉植骨固定合理可靠，是治疗股骨干缺损性骨不连短肢畸形的较理想方法，但骨愈合缓慢。植骨应避免遗留骨缺损，负重时间应向后推迟。

Interlocking intramedullary nails to treat defective nonunion of femoral shaft

objective To analyze the causes of defective nonunion of femoral shaft and to evaluate interlocking intramedullary nails in treatment of shortened limb deformity following nonunion of femoral shaft. Methods 12 patients with shortened limb deformity following nonunion of femoral shaft were treated with autograft of ilium to fill up the defects and fixation by interlocking intramedullary nails. The patients were followed up for an average of 20 months. Results All the 12 patients healed by first intention after an average of 22 months. The limbs were lengthened averagely by 3.2cm. No failure occurred due to bent or broken major nails or intramedullary nails. Conclusions The main cause of shortened limb deformity following femoral shaft nonunion is bone resorption due to unreliable fixation. Interlocking intramedullary nails are an ideal device for shortened limb deformity following femoral shaft nonunion, though the union process is slow. In bone graft, care should be taken to avoid the complication of bone defect and weight bearing should be carried out some time later.