JOA (Japanse Orthopaedic Association) scout at injury and during follow-up were recorded to make a comparison between A group and B group before and after operation.

• 根据损伤时日本骨科学会(JOA)评分、治疗后随访JOA评分，比较手术治疗前后A、B两组JOA评分增加幅度。