{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T04:32:19Z","timestamp":1791433939065,"version":"4.3.3"},"reference-count":38,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2019,11,27]],"date-time":"2019-11-27T00:00:00Z","timestamp":1574812800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2019,11,27]],"date-time":"2019-11-27T00:00:00Z","timestamp":1574812800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2019,11,27]],"date-time":"2019-11-27T00:00:00Z","timestamp":1574812800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/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":[[2020,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The aim of this study was to demonstrate, whether the degree of limb alignment correction in varus knee osteoarthritis correlated with an increase in ankle symptoms and to define a cut\u2010off value concerning the degree of correction above which to expect ankle problems.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Ninety\u2010nine consecutive patients with preoperative intraarticular varus knee deformities who underwent total knee arthroplasty were retrospectively analyzed. Patients were examined clinically (Knee Society Score, Forgotten Joint Score, Foot Function Index, Range of Motion of the knee and ankle joint, pain scales) as well as radiologically. The mean follow\u2010up time was 57\u00a0months.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The degree of operative limb alignment correction strongly correlated with the Foot Function Index (<jats:italic>R<\/jats:italic>\u2009=\u20090.91, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). Given this, higher degrees of knee malalignment corrections were associated with worse postoperative outcomes in the knee and ankle joint\u2014despite postoperative improved joint line orientations. Subsequently, a cut\u2010off value for arthritic varus deformities (14.5\u00b0) could be calculated, above which the prevalence of ankle symptoms increased manifold [OR\u2009=\u200915.6 (3.2\u201377.2 95% CI <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05)]. Furthermore, ROM restrictions in the subtalar joint were associated with a worse outcome in the ankle joint.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>When correcting excessive intraarticular varus knee osteoarthritis, surgeons have to be aware of possible postoperative ankle symptoms and should consider ankle deformities or decreased subtalar ROM before operative procedures.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>III.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-019-05812-9","type":"journal-article","created":{"date-parts":[[2019,11,27]],"date-time":"2019-11-27T11:02:51Z","timestamp":1574852571000},"page":"3758-3765","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Correction of excessive intraarticular varus deformities in total knee arthroplasty is associated with deteriorated postoperative ankle function"],"prefix":"10.1002","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0435-9059","authenticated-orcid":false,"given":"Frank","family":"Graef","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Center for Musculoskeletal Surgery Charit\u00e9\u2010University Medicine Berlin Charit\u00e9platz 1 10117 Berlin Germany"},{"name":"<!--<label>2<\/label>--> Berlin Institute of Health Anna\u2010Louisa\u2010Karsch\u2010Stra\u00dfe 2 10178 Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Falk","sequence":"additional","affiliation":[{"name":"<!--<label>3<\/label>--> Department of Orthopaedics M\u00e4rkisch\u2010Oderland Hospital, Brandenburg Medical School Theodor Fontane Wriezen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Tsitsilonis","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Center for Musculoskeletal Surgery Charit\u00e9\u2010University Medicine Berlin Charit\u00e9platz 1 10117 Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.","family":"Perka","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Center for Musculoskeletal Surgery Charit\u00e9\u2010University Medicine Berlin Charit\u00e9platz 1 10117 Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R. 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