{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,30]],"date-time":"2026-10-30T00:29:27Z","timestamp":1793320167862,"version":"4.5.0"},"reference-count":38,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2021,9,13]],"date-time":"2021-09-13T00:00:00Z","timestamp":1631491200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2021,9,13]],"date-time":"2021-09-13T00:00:00Z","timestamp":1631491200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2021,9,13]],"date-time":"2021-09-13T00:00:00Z","timestamp":1631491200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2022,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Lateral compartment osteoarthritis progression (LOP) is a major complication after Oxford mobile\u2010bearing unicompartmental knee arthroplasty (OUKA). This study aimed to identify the association between tibiofemoral subluxation (TFS) and LOP after OUKA. Patients whose TFS was uncorrectable according to preoperative stress radiographs were hypothesised to develop residual TFS even after surgery, and thought to be more likely to develop LOP.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The study included 201 patients who underwent medial OUKA. Fifteen patients showed increases in LOP of at least two Kellgren\u2013Lawrence grades after surgery [progression (P) group], while the others had no progression (N group, <jats:italic>n<\/jats:italic>\u2009=\u2009186). TFS was measured on preoperative full leg weight\u2010bearing radiographs, valgus stress radiographs and postoperative plain radiographs. Valgus stress radiographs were obtained using a firm manual valgus force with the knee flexed at 20\u00b0. Leg alignment, Oxford knee score (OKS), and revision rates were assessed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The <jats:italic>P<\/jats:italic> group had significantly higher TFS values on preoperative valgus stress (6.8\u00b0\u2009\u00b1\u20092.2\u00b0 vs. 4.5\u00b0\u2009\u00b1\u20092.0\u00b0; <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001) and postoperative radiographs (6.6\u00b0\u2009\u00b1\u20092.3\u00b0 vs. 4.6\u00b0\u2009\u00b1\u20092.9\u00b0; <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001) than the N group. Patients with postoperative residual TFS and postoperative valgus alignment were more likely to have LOP, but 9 of the 15\u00a0LOP patients did not show postoperative valgus alignment. The P group had significantly poorer postoperative OKS (33.0\u2009\u00b1\u200910.2 vs. 37.4\u2009\u00b1\u20096.5, <jats:italic>P<\/jats:italic>\u2009=\u20090.017) and a higher rate of revision (6\/15 vs 6\/186; odds ratio\u2009=\u200919.16; 95% CI\u2009=\u20094.98\u201376.05, <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>OA progression in the lateral compartment after medial OUKA might be associated with postoperative residual TFS, but does not always coexist with postoperative valgus alignment. Preoperative assessment of TFS with valgus stress could be a potential predictor of postoperative residual TFS and LOP.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>Level III.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-021-06729-y","type":"journal-article","created":{"date-parts":[[2021,9,12]],"date-time":"2021-09-12T22:02:48Z","timestamp":1631484168000},"page":"3236-3243","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Lateral osteoarthritis progression is associated with a postoperative residual tibiofemoral subluxation in Oxford UKA"],"prefix":"10.1002","volume":"30","author":[{"given":"Tomoyuki","family":"Kamenaga","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopedic Surgery and Joint Surgery Centre Takatsuki General Hospital 1\u20103\u201013, Kosobe\u2010cho 569\u20101192 Takatsuki Osaka 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