Abstract：
The femoral neck system (FNS) was recently introduced for treatment of femoral neck fractures. A novel feature is an anti-rotation screw with a diverging design from the neck bolt to provide rotational stability. Using the 4 Nm torque limiting screwdriver might cause the incomplete insertion of the screw specifically in dense or sclerotic bone. A nontorque limiting manual screwdriver should be used to complete the insertion and locking of the screw to prevent this error. We present series of seven cases with incomplete insertion of the anti-rotation screw in patient with femoral neck fractures treated with the FNS.
摘要：
股骨颈系统（FNS）最近被引入用于治疗股骨颈骨折。新颖的特征是具有从颈部螺栓发散的设计以提供旋转稳定性的防旋转螺钉。使用4Nm的扭矩限制螺丝刀可能会导致螺钉不完全插入，特别是在致密或硬化骨中。应使用无扭矩限制的手动螺丝刀完成螺钉的插入和锁定，以防止此错误。我们介绍了用FNS治疗的股骨颈骨折患者的7例防旋转螺钉未完全插入的病例。
