Anterior knee pain following total knee arthroplasty (TKA) is associated with patient dissatisfaction. Factors related to postoperative anterior knee pain and its impact on patient outcomes are poorly understood. The following are the aims of this study: (1) to report the prevalence of anterior knee pain before and after TKA using a posterior-stabilized prosthesis with routine patellar resurfacing; (2) to investigate the association of preoperative clinical factors with the presence of anterior knee pain after TKA; and (3) to explore the association of postoperative anterior knee pain with postoperative self-reported function and quality of life. This retrospective study included 506 patients who had undergone elective primary unilateral TKA with a posterior-stabilized prosthesis and patellar resurfacing. Outcome measures prior to and 12 months after TKA included self-reported anterior knee pain, knee function, and quality of life. Prevalence of anterior knee pain was 72% prior to and 15% following TKA. Patients who had preoperative anterior knee pain had twice the risk of experiencing anterior knee pain after TKA than patients who did not have preoperative anterior knee pain (risk ratio: 2.37, 95% CI 1.73-2.96). Greater severity of preoperative anterior knee pain and worse self-reported function were associated with the presence of postoperative anterior knee pain (rho = 0.15, < .01; rho = 0.13, < .01, respectively). Preoperative age, gender, and quality of life were not associated with postoperative anterior knee pain. Greater severity of postoperative anterior knee pain was associated with worse knee function at 12 months postoperative (rho = 0.49, < .01). One in 7 patients reported anterior knee pain 12 months following posterior-stabilized and patella-resurfaced TKA. The presence of preoperative anterior knee pain and worse self-reported function are associated with postoperative anterior knee pain.

中文翻译：

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采用后稳定假体和髌骨表面置换的初次单侧全膝关节置换术后膝前痛：患病率和临床意义

全膝关节置换术 (TKA) 后的膝前痛与患者不满意有关。人们对术后膝前痛的相关因素及其对患者预后的影响知之甚少。本研究的目的如下：（1）报告使用后稳定假体进行常规髌骨表面置换的 TKA 前后膝关节前部疼痛的患病率； (2) 探讨术前临床因素与全膝关节置换术后膝前痛的关系； (3)探讨术后膝前痛与术后自我报告的功能和生活质量的关系。这项回顾性研究纳入了 506 名接受过选择性初次单侧全膝关节置换术（采用后稳定假体和髌骨表面置换术）的患者。 TKA 之前和之后 12 个月的结果测量包括自我报告的膝前疼痛、膝关节功能和生活质量。 TKA 前膝关节前痛的发生率为 72%，术后膝前痛的发生率为 15%。术前有膝前痛的患者在 TKA 后发生膝前痛的风险是术前没有膝前痛的患者的两倍（风险比：2.37，95% CI 1.73-2.96）。术前膝前疼痛的严重程度和自我报告的功能较差与术后膝前疼痛的存在相关（分别为 rho = 0.15，< .01；rho = 0.13，< .01）。术前年龄、性别和生活质量与术后膝前痛无关。术后膝前疼痛越严重，术后 12 个月膝关节功能越差（rho = 0.49，< .01）。七分之一的患者在后稳定和髌骨表面重建 TKA 后 12 个月报告膝关节前部疼痛。术前膝前疼痛的存在和自我报告的功能较差与术后膝前疼痛有关。