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Internal fixation with AF nail for the management of thoracolumbar fractures and spinal cord ingury;

AF钉治疗胸腰椎骨折合并脊髓神经损伤

Objective To explore and evaluate the clinical effects of AF nail instrument internal fixation treatment for thoracolumbar vertebral fracture.

目的观察AF钉治疗胸腰段椎体骨折的临床疗效。

Objective: To observe the difference in treatment of throat and lumbar vertebral fracture between AF nail and Dick nail.

目的:比较AF钉系统与Dick钉系统治疗胸腰椎骨折的疗效。

Objective To observe the clinical effect of AF screw instrumentation for treatment of thoracolumbar fracture with spinal cord inujry.

目的观察AF钉治疗胸腰椎骨折合并脊髓损伤的临床应用效果。

According to the test data of the fatigue lives under the different af values—the products of the blade tip amplitude and the first-order intrinsic frequencyof the 2th blade in aero-engine low compressor,the relationship between the fatigue life and af value is revealed.

以某型航空发动机低压压气机2级转子叶片一阶弯曲振动时不同af值(叶尖振幅与叶片固有振动频率乘积)及相应的振动疲劳寿命的试验结果为出发点,建立了叶片振动疲劳寿命与af值的关系,所得关系与传统的S-N关系相比,既不是幂函数也不是指数函数。