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目的：探讨膝关节骨性关节炎(OA)患者行单侧全膝关节置换术(TKA)后躯体重心位置(GCP)在水平方向上转移情况,并判断其转移程度与患肢功能恢复情况是否存在相关性。方法用重心测量仪对176例接受单侧 TKA 的膝关节 OA 患者进行 GCP 测定,根据 HSS 评分标准对患者术前1周、术后6个月、术后1年的患肢功能情况进行评估；同时记录患者 GCP,量化 GCP 转移程度,并与术侧膝关节 HSS 评分变化程度进行Pearson 分析。结果176例患者在 TKA 术后6个月和术后1年时 HSS 功能评分均较术前有明显改善,且随着术侧关节功能进一步恢复,患者 GCP 由起初的位置逐渐向术侧方向移动。结论术后 GCP 转移程度与同一时期患者 HSS 评分变化程度呈线性相关,患者 GCP 转移程度与同一时期 HSS 评分变化相关系数 R2分别为0．584和0．498。“,”Objective To explore the shifting of the gravity center position (GCP) of patients with osteoarthritis knee who underwent single total knee arthroplasty (TKA) and analyze if there is any relationship between shifting of GCP and recovering of the knee′s function. Methods One hundred and seventy six patients with osteoarthritis knee who underwent single TKA were retrospectively evaluated with HSS score system and measured GCP by corresponding in-strument a week preoperatively, six months and one year postoperatively. Make Pearson′s analysis between shifting degree of GCP and degree of changing HSS score. Results HSS score of 176 cases had significantly improved in 6, 12 months after surgery, as recovering function of the knee, the GCP moved from its initial position to the operative side after TKA. Conclusions There is a direct linear relationship between shifting degree of GCP and degree of changing HSS score at the same period after the surgery, and the adjusted R2 value between them are 0. 584 at six months after surgery and 0. 498 at one year after operation.