PURPOSE Resurfacing the patella in one-stage bilateral total knee arthroplasty (TKA) remains debatable. This study aimed to assess the mid-term outcomes of patients after one-stage bilateral TKA performed with and without patellar resurfacing, respectively, with at least five years of follow-up. METHODS Sixty-six patients (132 knees) scheduled for first-ever one-stage bilateral TKA due to osteoarthritis received patellar resurfacing and retention, respectively, on one knee and the other, randomly selected. All patients received Scorpio NRG knee prostheses and were evaluated by radiology (anteroposterior, lateral, and axial views) pre-operatively and yearly post-operatively, for at least five years. Knee Society Score and Feller Score values were measured. Anterior knee pain, patellar clunk, and patient satisfaction were assessed. RESULTS One patient died within five years of operation and four were lost to follow-up. One patient developed severe dementia and could not be constructively questioned. Therefore, 60 patients (120 knees) were finally analyzed. There were significantly improved Knee Society and Feller scores (P < 0.001) in the resurfacing group compared with the non-resurfacing group post-operatively. Anterior knee pain and patellar clunk rates were lower on the resurfaced side compared with the non-resurfaced side (P < 0.001). Meanwhile, 47% and only 7% patients preferred the resurfaced and non-resurfaced sides, respectively, at final follow-up. No revision was performed for patellofemoral complications, and no significant differences were found between the two groups in radiographic outcomes. CONCLUSIONS Using the Scorpio NRG knee prosthesis, patellar resurfacing is superior to non-resurfacing in patients with osteoarthritis observed for ≥ five years. REGISTRATION TRIALS NUMBER NCT03600922 KEY POINTS: • Findings Patellar resurfacing is superior to non-resurfacing in osteoarthritis (OA) patients undergoing total knee arthroplasty (TKA) with the Scorpio NRG knee prosthesis. • Implications Patellar resurfacing should be performed in OA patients during TKA. • Caution Several prosthesis types should be assessed in the same study setting, and multicenter studies are required before generalizability of the present findings.

中文翻译：

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一阶段双侧全膝关节置换术中versus骨重修与不重塑：骨：一项前瞻性随机临床试验。

目的在一阶段的双侧全膝关节置换术（TKA）中进行sur骨重塑仍然值得商bat。这项研究的目的是评估经过至少五年的随访，分别进行one骨表面置换和不进行pa骨表面置换的一阶段双侧TKA患者的中期结果。方法因骨关节炎而计划进行有史以来首次双阶段TKA的66例患者（132膝）分别在一个膝盖和另一个膝盖上随机选择pa骨重铺和retention留。所有患者均接受Scorpio NRG膝关节假体，并在术前和术后每年进行放射学检查（前后位，侧面和轴向位图），至少五年。测量膝关节社会得分和弗勒得分。评估前膝关节疼痛，pa骨塌陷和患者满意度。结果一名患者在手术五年内死亡，四名失访。一名患者患有严重的痴呆症，无法进行建设性的询问。因此，最终对60例患者（120膝）进行了分析。术后表面置换组与非表面置换组相比，膝关节协会和Feller评分有显着改善（P <0.001）。与未重覆侧相比，重覆侧前膝关节疼痛和pa骨tell陷率更低（P <0.001）。同时，在最后的随访中，分别有47％和仅7％的患者偏爱重铺表面和未重铺表面。revision股并发症未进行修订，两组在影像学结果方面无显着差异。结论使用Scorpio NRG膝关节假体，观察到≥5年的骨关节炎患者，tell骨表面置换优于非表面置换。注册试验编号NCT03600922要点：•结果对于使用Scorpio NRG膝关节假体进行全膝关节置换术（TKA）的骨关节炎（OA）患者，Pat骨表面置换优于非表面置换。•暗示在TKA期间，OA患者应进行Pat骨重铺。•注意应在相同的研究环境中评估几种假体类型，并且在将本研究结果推广之前，需要进行多中心研究。•结果对于采用Scorpio NRG膝关节假体进行全膝关节置换术（TKA）的骨关节炎（OA）患者，Pat骨表面翻修优于非表面翻修。•暗示在TKA期间，OA患者应进行Pat骨重铺。•注意应在相同的研究环境中评估几种假体类型，并且在将本研究结果推广之前，需要进行多中心研究。•结果对于采用Scorpio NRG膝关节假体进行全膝关节置换术（TKA）的骨关节炎（OA）患者，Pat骨表面翻修优于非表面翻修。•暗示在TKA期间，OA患者应进行Pat骨重铺。•注意应在相同的研究环境中评估几种假体类型，并且在将本研究结果推广之前，需要进行多中心研究。