{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,24]],"date-time":"2026-08-24T14:51:54Z","timestamp":1787583114959,"version":"build-2736575974"},"reference-count":33,"publisher":"EDP Sciences","license":[{"start":{"date-parts":[[2024,11,21]],"date-time":"2024-11-21T00:00:00Z","timestamp":1732147200000},"content-version":"vor","delay-in-days":325,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["SICOT-J"],"accepted":{"date-parts":[[2024,10,11]]},"published-print":{"date-parts":[[2024]]},"abstract":"<jats:p>\n<jats:italic>Background<\/jats:italic>: Total knee arthroplasty (TKA) for patients with a large preoperative deformity (more than 10\u00b0 varus or valgus) remains a challenge leading to a high rate of outliers, unsatisfactory functional results, or early prosthetic loosening. Robotic arm-assisted TKA (RATKA) has shown improvements in implant positioning accuracy. This study aimed to assess RATKA implant positioning accuracy and functional results at one year postoperative for patients with a large preoperative deformity. <jats:italic>Methods<\/jats:italic>: From November 2019 to July 2022, 500 RATKA were performed. About 74 patients with more than 10\u00b0 of varus or valgus global deformity were included. Each patient received a semi-constrained implant. The difference between the valgus or varus value planned intra-operatively and the varus or valgus measured on one-year postoperative X-rays has been assessed. Functional outcomes (VAS, range of motion, KOOS) have also been evaluated. <jats:italic>Results<\/jats:italic>: For varus, the mean difference was 0.54\u00a0\u00b1\u00a01.21\u00b0, all patients (100%) had a difference of less than 3\u00b0 at one-year post-operative. For valgus, the mean difference was 0.63\u00a0\u00b1\u00a01.29\u00b0, most patients (92%) had a difference of less than 3\u00b0 at one year postoperative. Overall, 98.6% (<jats:italic>n<\/jats:italic>\u00a0=\u00a073) of cases had a difference of less than 3\u00b0 at one-year postoperative. The mean VAS was 1.6\u00a0\u00b1\u00a01.4 [1;4]. Mean flexion was 132\u00a0\u00b1\u00a07.6\u00b0 [100;145]. A total of 69 patients (93%) had a good or excellent KOOS score (KOOS total\u00a0&gt;\u00a070) at one year post-operative. <jats:italic>Conclusion<\/jats:italic>: For large preoperative deformities, RATKA provides a high degree of accuracy in implant positioning, permitting it to fit the desired alignment without compromising knee stability, and giving the possibility of using semi-constrained implants. At one year postoperative, functional results are encouraging and most patients have recovered an optimal range of motions.<\/jats:p>","DOI":"10.1051\/sicotj\/2024046","type":"journal-article","created":{"date-parts":[[2024,11,21]],"date-time":"2024-11-21T09:18:12Z","timestamp":1732180692000},"page":"50","source":"Crossref","is-referenced-by-count":3,"title":["Does robotic arm-assisted total knee arthroplasty have a role to play in large 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