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对断裂的金属接骨螺钉进行了化学成分、硬度、显微组织分析及表面加工质量的检测。对检测结果分析表明,螺钉所使用的材料符合国家标准要求,螺钉的螺纹根部加工刀痕处应力集中,产生多条裂纹,导致螺钉断裂。
The fracture of the metal bone screw chemical composition, hardness, microstructure analysis and surface quality inspection. The test results show that the materials used in the screw meet the requirements of the national standard. The stress at the root of the screw thread is concentrated at the cutting edge, resulting in a number of cracks that lead to the screw fracture.