{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T10:00:27Z","timestamp":1785405627120,"version":"3.56.0"},"reference-count":27,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T00:00:00Z","timestamp":1785369600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T00:00:00Z","timestamp":1785369600000},"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."],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>Lateral unicompartmental knee arthroplasty (UKA) is an effective treatment for isolated lateral\u2010compartment osteoarthritis, yet detailed evidence\u2010based indication criteria remain poorly defined. Therefore, this study evaluated the association between preoperative medial\u2010compartment osteophytes and reoperation\u2010free survival, implant survivorship, medial\u2010compartment disease progression requiring reoperation, and postoperative functional outcomes following lateral UKA.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      A total of 900 lateral UKAs (830 patients) performed between 2016 and 2021 with a minimum follow\u2010up of 2 years (mean 5.1\u2009\u00b1\u20091.8 years) were retrospectively analysed. Using the OARSI (Osteoarthritis Research Society International) atlas, knee radiographs were stratified into no medial osteophytes (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009601), small osteophytes (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009180) and moderate\/severe osteophytes (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009119). Kaplan\u2013Meier survival analysis estimated 9\u2010year survival for the endpoints reoperation, implant revision and disease progression requiring reoperation. Functional outcomes were assessed using the Oxford Knee Score (OKS) and University of California, Los Angeles (UCLA) Activity Score.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Reoperation\u2010free survival at 9 years was 94.2% (95% confidence interval [CI]: 91.6\u201396.8) for knees without osteophytes, 93.0% (95% CI: 88.5\u201397.5) for small osteophytes, and 91.8% (95% CI: 86.5\u201397.1) for moderate\/severe osteophytes (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.489). Implant survivorship was comparably high across groups (98.3%, 98.1% and 98.0%), respectively (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.972). Medial\u2010compartment disease progression was not associated with radiographic medial osteophyte status (97.6% [95% CI: 96.1\u201398.5], 98.7% [95% CI: 95.0\u201399.7] and 96.9% [95% CI: 93.4\u201398.5];\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.616). Functional outcomes improved significantly across groups without differences between groups (OKS:\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.389; UCLA:\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.353).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Clinically relevant medial\u2010compartment disease progression requiring reoperation after lateral UKA is uncommon at mid\u2010term follow\u2010up and appears to be independent of the presence or severity of medial\u2010compartment osteophytes. These findings suggest that medial\u2010compartment osteophytes alone should not preclude appropriately selected patients from undergoing lateral UKA when indications are based on stress radiographs.<\/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.70558","type":"journal-article","created":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T09:15:54Z","timestamp":1785402954000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Preoperative medial\u2010compartment osteophytes do not adversely affect the outcome of lateral unicompartmental knee arthroplasty"],"prefix":"10.1002","author":[{"given":"Conradin","family":"Schweizer","sequence":"first","affiliation":[{"name":"Orthop\u00e4dische Klinik Paulinenhilfe, Diakonie\u2010Klinikum Stuttgart Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatjana","family":"Krug","sequence":"additional","affiliation":[{"name":"Orthop\u00e4dische Klinik Paulinenhilfe, Diakonie\u2010Klinikum Stuttgart Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Solongo","family":"Abdulai","sequence":"additional","affiliation":[{"name":"Orthop\u00e4dische Klinik Paulinenhilfe, Diakonie\u2010Klinikum Stuttgart Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joachim","family":"Herre","sequence":"additional","affiliation":[{"name":"Orthop\u00e4dische Klinik Paulinenhilfe, Diakonie\u2010Klinikum Stuttgart Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter R.","family":"Aldinger","sequence":"additional","affiliation":[{"name":"Orthop\u00e4dische Klinik Paulinenhilfe, Diakonie\u2010Klinikum Stuttgart Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Merle","sequence":"additional","affiliation":[{"name":"Orthop\u00e4dische Klinik Paulinenhilfe, Diakonie\u2010Klinikum Stuttgart 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":"Orthop\u00e4dische Klinik Paulinenhilfe, Diakonie\u2010Klinikum Stuttgart Stuttgart Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,30]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2006.11.009"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.107B4.BJJ-2024-0977.R1"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.94B12.29416"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/ksa.12785"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.80B1.0800063"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.97B12.36465"},{"key":"e_1_2_12_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-016-4313-9"},{"key":"e_1_2_12_9_1","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.98B10.BJJ-2016-0432.R1"},{"key":"e_1_2_12_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-023-04841-x"},{"key":"e_1_2_12_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2024.05.067"},{"key":"e_1_2_12_12_1","first-page":"1","article-title":"Similar 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