Objective: To summarize the research progress of femoral neck system (FNS) in the treatment of femoral neck fracture in young and middle-aged patients.
Methods: The literature on FNS at home and abroad in recent years was extensively reviewed, and the results of mechanical and clinical studies on FNS were summarized based on clinical experience.
Results: FNS has good mechanical stability, which can reduce complications such as femoral neck shortening, internal fixation failure, and varus caused by mechanical instability. At present, FNS is mainly selected for comparison with cannulated compression screws and dynamic hip screws in clinical research. The results show that FNS has the advantages of minimally invasive, short operation time, less intraoperative fluoroscopy, earlier postoperative weight-bearing and fracture healing, and better hip function recovery.
Conclusion: As a new internal fixator, FNS has achieved satisfactory results in the current research. FNS has good mechanical advantages, which is beneficial to fracture healing and the recovery of hip joint function after operation. However, whether FNS can reduce the incidence of nonunion and osteonecrosis of the femoral head remains to be further clarified.
目的: 总结股骨颈动力交叉钉系统（femoral neck system，FNS）治疗青壮年股骨颈骨折的研究进展。.
方法: 广泛查阅近年来国内外关于FNS的相关文献，结合临床经验对FNS的生物力学研究及临床研究结果进行总结。.
结果: FNS具有较好的力学稳定性，能减少因力学不稳定导致的股骨颈短缩、内固定失效、髋关节内翻等并发症。目前临床研究主要与空心加压螺钉以及动力髋螺钉比较，结果显示FNS具有微创、手术时间短、术中透视次数少、患者术后负重及骨折愈合较早、髋关节功能恢复好等优点。.
结论: FNS作为一种新的内固定物，目前研究显示治疗青壮年股骨颈骨折可取得较满意疗效，有利于骨折愈合及术后髋关节功能恢复。但对于FNS能否减少术后骨不连及股骨头坏死的发生，有待进一步研究明确。.
Keywords: Femoral neck system; femoral neck fracture; internal fixation; young and middle-aged adults.