{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T19:02:09Z","timestamp":1789844529493,"version":"4.0.1"},"reference-count":40,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2026,5,25]],"date-time":"2026-05-25T00:00:00Z","timestamp":1779667200000},"content-version":"vor","delay-in-days":54,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T00:00:00Z","timestamp":1775001600000},"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":["J. exp. orthop."],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>Revision following unicompartmental knee arthroplasty (UKA) remains challenging, and optimal revision strategy is still debated. This study analysed failure mechanisms after aseptic medial UKA revision and compared mid\u2010term outcomes between UKA\u2010to\u2010UKA and UKA\u2010to\u2010total knee arthroplasty (TKA) revision procedures.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      A retrospective single\u2010centre study included 113 consecutive aseptic UKA revisions performed between 2001 and 2020. Patients were stratified into UKA\u2010to\u2010UKA (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200938) and UKA\u2010to\u2010TKA (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200975) groups. Progression of lateral osteoarthritis (31%) and aseptic loosening (27%) were the most common indications for revision. Re\u2010revision rates were evaluated and implant survival was assessed using Kaplan\u2013Meier analysis with log\u2010rank testing and Cox regression. Functional outcomes were evaluated using validated patient\u2010reported outcome measures (Oxford Knee Score, Knee Society Scores, UCLA activity score, visual analogue scale) and range of motion.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      During follow\u2010up, re\u2010revision occurred in 8 of 38 UKA\u2010to\u2010UKA revisions (21.1%) and in 3 of 75 UKA\u2010to\u2010TKA revisions (4.0%). Re\u2010revision after UKA\u2010to\u2010TKA revision occurred due to suspected early infection (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20092) and aseptic loosening (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20091), whereas after UKA\u2010to\u2010UKA revision the main causes were aseptic loosening (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20093), unexplained pain (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20093) and bearing dislocation (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20092). Overall, 10\u2010year implant survival was 89.7%. Implant survival at 10 years was higher following UKA\u2010to\u2010TKA revision compared with UKA\u2010to\u2010UKA revision (95.3% vs. 78.6%; log\u2010rank\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.003). PROMs did not differ significantly between groups, whereas range of motion was greater after UKA\u2010to\u2010UKA revision (126\u00b0 vs. 114\u00b0,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Conversion of medial UKA to TKA was associated with lower re\u2010revision rates compared with UKA\u2010to\u2010UKA revision, while patient\u2010reported outcomes were comparable between strategies. UKA\u2010to\u2010UKA revision may remain appropriate in selected cases with surgically addressable failure mechanisms. These findings support an individualised revision strategy based on the underlying cause of failure.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level III, retrospective cohort study.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/jeo2.70778","type":"journal-article","created":{"date-parts":[[2026,5,25]],"date-time":"2026-05-25T14:36:42Z","timestamp":1779719802000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Lower re\u2010revision rates after UKA\u2010to\u2010TKA than UKA\u2010to\u2010UKA revision for failed medial unicompartmental knee arthroplasty at mid\u2010term 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