{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T15:29:41Z","timestamp":1782487781745,"version":"3.54.5"},"reference-count":25,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2023,7,3]],"date-time":"2023-07-03T00:00:00Z","timestamp":1688342400000},"content-version":"vor","delay-in-days":2,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2023,7]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>Finding reliable tools to predict alignment change after medial mobile\u2010bearing unicompartmental knee arthroplasty (UKA) can help surgeons avoid under\u2010 or over\u2010correction. This prospective study aimed to investigate whether the parameters related to medial collateral ligament tension on valgus stress radiograph can predict the alignment change of medial mobile\u2010bearing UKA and establish a prediction model.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This study prospectively included the patients undergoing medial mobile\u2010bearing UKA for knee osteoarthritis from November 2018 and April 2021. Patients took valgus stress radiograph and MRI preoperatively and took full\u2010length weight\u2010bearing anterior\u2013posterior radiograph of the lower extremity preoperatively and postoperatively. The medial joint space width (MJSW) on valgus stress radiograph, area of femoral and tibial osteophyte on MRI, medial extrusion distance (MED) of the meniscus on MRI, and the change in hip\u2010knee\u2010ankle angle (\u2206HKAA) were measured. Factors influencing \u2206HKAA were analyzed by correlation analysis. Univariable and multivariable linear regression analysis was performed to establish a prediction model of \u2206HKAA.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>One hundred and seven knees were included. On average, the preoperative HKAA was 170.84\u00b0\u2009\u00b1\u20093.73\u00b0, and UKA corrected the alignment to 175.16\u00b0\u2009\u00b1\u20093.21\u00b0 postoperatively (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), with \u2206HKAA of 4.33\u00b0\u2009\u00b1\u20091.93\u00b0. Correlation analysis showed that \u2206HKAA correlated with MJSW (<jats:italic>r<\/jats:italic>\u2009=\u20090.628, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), MED (<jats:italic>r<\/jats:italic>\u2009=\u20090.262, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), and tibial osteophyte area (<jats:italic>r<\/jats:italic>\u2009=\u20090.235, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). The prediction model for \u2206HKAA was obtained by multivariable linear regression: \u2206HKAA\u2009=\u2009\u22122.003\u2009+\u20090.947\u2009\u00d7\u2009MJSW(mm)\u2009+\u20091.838\u2009\u00d7\u2009total osteophyte area(cm<jats:sup>2<\/jats:sup>).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Valgus stress radiographic MJSW and osteophyte area are correlated to the alignment change of medial mobile\u2010bearing UKA. The prediction model for HKAA change is: \u2206HKAA\u2009=\u2009\u22122.003\u2009+\u20090.947\u2009\u00d7\u2009MJSW(mm)\u2009+\u20091.838\u2009\u00d7\u2009total osteophyte area(cm<jats:sup>2<\/jats:sup>).<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.13823","type":"journal-article","created":{"date-parts":[[2023,7,3]],"date-time":"2023-07-03T09:20:46Z","timestamp":1688376046000},"page":"1847-1853","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Valgus Stress Radiograph Can Predict Alignment Change of Medial Mobile\u2010Bearing Unicompartmental Knee Arthroplasty"],"prefix":"10.1111","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2469-4030","authenticated-orcid":false,"given":"Xufeng","family":"Jiao","sequence":"first","affiliation":[{"name":"Department of Orthopedics Xuanwu Hospital Capital Medical University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zheng","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Orthopedics Xuanwu Hospital Capital Medical University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mincong","family":"Du","sequence":"additional","affiliation":[{"name":"Department of Orthopedics Xuanwu Hospital Capital Medical University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuai","family":"An","sequence":"additional","affiliation":[{"name":"Department of Orthopedics Xuanwu Hospital Capital Medical University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiang","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Orthopedics Xuanwu Hospital Capital Medical University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8456-9522","authenticated-orcid":false,"given":"Guanglei","family":"Cao","sequence":"additional","affiliation":[{"name":"Department of Orthopedics Xuanwu Hospital Capital Medical University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,7,3]]},"reference":[{"key":"e_1_2_9_2_1","unstructured":"Norwegian National Advisory Unit on Arthroplasty and Hip Fractures.2017."},{"key":"e_1_2_9_3_1","unstructured":"Danish Knee Arthroplasty Register.The Danish Knee Arthroplasty Register Annual Report 2019.2019."},{"key":"e_1_2_9_4_1","unstructured":"New Zealand Orthopedic Association.The New Zealand Joint Registry 19th report January 1999 to December 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