{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T19:13:45Z","timestamp":1792782825407,"version":"4.5.0"},"reference-count":33,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2020,8,24]],"date-time":"2020-08-24T00:00:00Z","timestamp":1598227200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2020,8,24]],"date-time":"2020-08-24T00:00:00Z","timestamp":1598227200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2020,8,24]],"date-time":"2020-08-24T00:00:00Z","timestamp":1598227200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Charit\u00e9","id":[{"id":"https:\/\/ror.org\/001w7jn25","id-type":"ROR","asserted-by":"crossref"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2022,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>The aim of this study was to assess the mid\u2010term clinical outcome of the ankle joint after total knee arthroplasty (TKA) in high\u2010grade valgus osteoarthritis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      In this case\u2013control study,\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200936 patients with a preoperative mechanical tibiofemoral angle (mTFA)\u2009\u2265\u200915\u00b0 who underwent TKA between December 2002 and December 2012 were included. The control group (mTFA\u2009&lt;\u200915\u00b0) of\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200960 patients was created using case matching. Radiological [mechanical tibiofemoral angle (mTFA) and ankle joint orientation to the ground (G\u2010AJLO)] and clinical parameters [Foot Function Index (FFI), Knee Society Score, Forgotten Joint Score, and Range of Motion (ROM)] were analysed. The mean follow\u2010up time was 59\u00a0months (IQR [56, 62]).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The degree of correcting the mTFA by TKA significantly correlated with the postoperative FFI (\n                      <jats:italic>R<\/jats:italic>\n                      \u2009=\u20090.95,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05), although the knee and ankle joint lines were corrected to neutral orientations. A cut\u2010off value of 16.5\u00b0 [AUC 0.912 (0.85\u20130.975 95% CI), sensitivity\u2009=\u20090.8, specificity\u2009=\u20090.895] was calculated, above which the odds ratio (OR) for developing ankle symptoms increased vastly [OR 34.0 (9.10\u2013127.02 95% CI)]. ROM restrictions of the subtalar joint displayed a strong significant correlation with the FFI (\n                      <jats:italic>R<\/jats:italic>\n                      \u2009=\u20090.74,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05), demonstrating that decreased ROM of the subtalar joint was associated with aggravated outcomes of the ankle joint.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>In this study, higher degrees of leg axis correction in TKA were associated with increased postoperative ankle symptoms. When TKA is performed in excessive valgus knee osteoarthritis, surgeons should be aware that this might trigger the onset or progression of ankle symptoms, particularly in cases of a stiff subtalar joint.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of evidence<\/jats:title>\n                    <jats:p>III.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00167-020-06246-4","type":"journal-article","created":{"date-parts":[[2020,8,24]],"date-time":"2020-08-24T12:02:36Z","timestamp":1598270556000},"page":"527-535","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Correction of severe valgus osteoarthritis by total knee arthroplasty is associated with increased postoperative ankle symptoms"],"prefix":"10.1002","volume":"30","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"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hagen","family":"Hommel","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Department of Orthopedics, M\u00e4rkisch\u2010Oderland Hospital Brandenburg Medical School Theodor Fontane Wriezen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roman","family":"Falk","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Department of Orthopedics, M\u00e4rkisch\u2010Oderland Hospital Brandenburg Medical School Theodor Fontane Wriezen 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May 2020","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"14 August 2020","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"24 August 2020","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with ethical standards"}},{"value":"All authors declare that they have no conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"This study was approved by the local ethics committee (AS17(bB)\/2015).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Written informed consent of all patients was obtained.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Informed consent"}}]}}