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Anteroposterior double-limb weight bearing X-ray film of a 57-year-old female patient with medial osteoarthritis of bilateral knees (more severe pain in the left knee, bilateral Kellgren-Lawrence grade Ⅰ)
患者，女，57 岁，双膝关节内侧骨关节炎（左膝疼痛明显，双侧 Kellgren-Lawrence 分级Ⅰ级），双下肢全长负重正位 X 线片
a. 术前；b. 术后 2 个月
a. Before operation; b. At 2 months after operation
