Results The causes of spinal internal fixation broken were stress concentration and abnormal movement of internal fixation, and was mainly relative to poor techniques.

结果椎弓根螺钉内固定折断原因为局部应力集中及异常活动，多为技术因素。

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Results The causes of spinal internal fixation broken were stress concentration and abnormal movement of internal fixation, and was mainly relative to poor techniques.

结果椎弓根螺钉内固定折断原因为局部应力集中及异常活动，多为技术因素。

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