Spokane Joint Replacement Center Inc., Spokane, Washington; Washington State University, Elson S. Floyd College of Medicine, Spokane, Washington.
Spokane Joint Replacement Center Inc., Spokane, Washington.
J Arthroplasty. 2022 Aug;37(8S):S852-S858. doi: 10.1016/j.arth.2022.02.059. Epub 2022 Feb 18.
There is no consensus whether a posterior-stabilized (PS) total knee device is superior to a more congruent, cruciate-substituting, medial-stabilized device (MS). This study compared the clinical outcomes of these devices. The primary hypothesis was that the clinical outcomes would be better in the MS group implanted with kinematic alignment.
This prospective, randomized, single-center Level 1 study compared the outcomes of 99 patients who received a PS device and 101 patients who received an MS device implanted with kinematic alignment. Institutional Review Board approval and informed consent were obtained. Clinical and radiographic assessments were performed preoperatively, 6 weeks, 6 months, and annually.
All subjects reached the minimum follow-up of 2 years. There were no statistically significant differences in demographic characteristics, preoperative scores, or alignment (preoperative or postoperative). Tourniquet time was 7.24% longer for the PS group (40.28 min vs 37.56 min, P < .0086). There were significant differences between groups for the 1-year and 2-year Knee Society scores, Forgotten Joint Score, and ROM; in every case favoring the MS group. The FJS was 68.3 in the MS group at 2 years and 58.3 in the PS group (P = .02). The maximum flexion at 2 years was 132° in the MS group and 124° in the PS group (P < .0001).
The clinical outcomes of the MS group at 1 and 2 years were better. At the minimum 2-year follow-up, the results demonstrate the superiority of the medial-stabilized device in terms of multiple clinical outcomes.
I.
在后稳定（PS）全膝关节装置是否优于更一致、替代交叉韧带、内侧稳定装置（MS），目前尚无共识。本研究比较了这两种装置的临床结果。主要假设是在接受运动学对线植入的 MS 组中，临床结果会更好。
这是一项前瞻性、随机、单中心 1 级研究，比较了 99 例接受 PS 装置和 101 例接受运动学对线植入的 MS 装置的患者的结果。获得了机构审查委员会的批准和知情同意。在术前、6 周、6 个月和每年进行临床和影像学评估。
所有患者均达到了至少 2 年的最低随访时间。两组患者的人口统计学特征、术前评分或对线（术前或术后）均无统计学差异。PS 组的止血带时间长 7.24%（40.28 分钟比 37.56 分钟，P<.0086）。两组患者在 1 年和 2 年的膝关节学会评分、遗忘关节评分和 ROM 方面存在显著差异，所有这些都有利于 MS 组。在 2 年时，MS 组的 FJS 为 68.3，PS 组为 58.3（P=0.02）。MS 组在 2 年时的最大屈曲度为 132°，PS 组为 124°（P<0.0001）。
在 1 年和 2 年时，MS 组的临床结果更好。在至少 2 年的随访中，结果表明内侧稳定装置在多个临床结果方面具有优势。
I。
