{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T01:55:15Z","timestamp":1791424515841,"version":"4.3.3"},"reference-count":32,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2025,7,18]],"date-time":"2025-07-18T00:00:00Z","timestamp":1752796800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,7,18]],"date-time":"2025-07-18T00:00:00Z","timestamp":1752796800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["esskajournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2025,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>Limited evidence exists regarding the safety and efficacy of medial unicompartmental knee arthroplasty (UKA) in patients with end\u2010stage medial arthritis following knee osteotomy. This study aims to evaluate survival, functional and radiological outcomes in patients undergoing medial UKA following knee osteotomy.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      A retrospective analysis was conducted evaluating 63 knees (60 patients; 62% men, 38% women; mean age 61\u2009\u00b1\u20098 years; body mass index 28\u2009\u00b1\u20095\u2009kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      ) who underwent medial UKA (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200947 mobile\u2010bearing,\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200916 fixed\u2010bearing) following knee osteotomy. Patients were considered suitable for medial UKA if they met the Oxford criteria and had a preoperative hip\u2013knee\u2013ankle angle (HKAA)\u2009&lt;\u20095\u00b0 valgus and a medial proximal tibial angle (MPTA)\u2009&lt;\u200995\u00b0. Primary outcomes were cumulative revision rates for (1) conversion to total knee arthroplasty (TKA) and (2) any reoperation. Functional outcomes were assessed using the Oxford Knee Score (OKS) and the UCLA Activity Score. HKAA was measured to determine overall limb alignment pre\u2010 and post\u2010operatively.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The average time from osteotomy to UKA was 11\u2009\u00b1\u20098 years, and the mean follow\u2010up after UKA was 5\u2009\u00b1\u20092 years. The cumulative 8\u2010year implant survival rate was 96.3% (95% confidence interval [CI]: 0.912\u20131.0) for revision to TKA and 93.2% (95% CI: 0.899\u20130.965) for any reoperation. Two patients required revision to TKA due to overcorrection and infection. The mean OKS improved from 25.5\u2009\u00b1\u20095.9 preoperatively to 42.8\u2009\u00b1\u20096.0 post\u2010operatively (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). The mean preoperative HKAA of 2.4\u2009\u00b1\u20093.0\u00b0 varus was corrected to 0.0\u2009\u00b1\u20093.1\u00b0.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Medial UKA after knee osteotomy represents a viable treatment option, but it requires a strict preoperative alignment assessment. In the absence of excessive mechanical valgus alignment (HKAA\u2009&lt;\u20093\u00b0 valgus) and severe valgus deformities (MPTA\u2009&lt;\u200995\u00b0) of the proximal tibia, medial UKA provides favourable midterm implant survivorship and excellent functional outcomes. In borderline cases, fixed\u2010bearing implants should be considered to avoid valgus overcorrection.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level IV.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ksa.12779","type":"journal-article","created":{"date-parts":[[2025,7,18]],"date-time":"2025-07-18T13:12:07Z","timestamp":1752844327000},"page":"4303-4311","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Medial unicompartmental knee arthroplasty after knee osteotomy is safe and effective in the absence of excessive valgus overcorrection"],"prefix":"10.1002","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-8377-4775","authenticated-orcid":false,"given":"Conradin","family":"Schweizer","sequence":"first","affiliation":[{"name":"Orthopaedic Clinic Paulinenhilfe Diakonie\u2010Klinikum Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anil","family":"Pulatkan","sequence":"additional","affiliation":[{"name":"Orthopaedic Clinic Paulinenhilfe Diakonie\u2010Klinikum Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatjana","family":"Krug","sequence":"additional","affiliation":[{"name":"Orthopaedic Clinic Paulinenhilfe Diakonie\u2010Klinikum Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joachim","family":"Herre","sequence":"additional","affiliation":[{"name":"Orthopaedic Clinic Paulinenhilfe Diakonie\u2010Klinikum Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter R.","family":"Aldinger","sequence":"additional","affiliation":[{"name":"Orthopaedic Clinic Paulinenhilfe Diakonie\u2010Klinikum Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Merle","sequence":"additional","affiliation":[{"name":"Orthopaedic Clinic Paulinenhilfe Diakonie\u2010Klinikum Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0218-1426","authenticated-orcid":false,"given":"Wenzel","family":"Waldstein","sequence":"additional","affiliation":[{"name":"Orthopaedic Clinic Paulinenhilfe Diakonie\u2010Klinikum Stuttgart Germany"},{"name":"Center for Orthopaedics, Trauma Surgery and Rehabilitation Medicine University Medicine Greifswald Greifswald 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