{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T13:29:32Z","timestamp":1753882172270,"version":"3.41.2"},"reference-count":23,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2024,7,25]],"date-time":"2024-07-25T00:00:00Z","timestamp":1721865600000},"content-version":"vor","delay-in-days":206,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Orthopedics"],"published-print":{"date-parts":[[2024,1]]},"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> Knee osteoarthritis (OA) with extra\u2010articular deformity (EAD) is a rare condition for which achieving accurate alignment with total knee arthroplasty (TKA) is difficult. Extra\u2010articular corrective osteotomy may be necessary for severe deformities.<\/jats:p><jats:p><jats:bold>Case Presentation:<\/jats:bold> A 76\u2010year\u2010old man underwent TKA for knee OA with EAD due to malunion after fractures of the femur and tibia. The femoral varus and the tibial valgus\/recurvatum deformities were mild and corrected by intra\u2010articular osteotomy using navigation (i.e., navigation\u2010assisted standard TKA). However, the femoral antecurvatum deformity was severe, and we performed extra\u2010articular corrective osteotomy simultaneously with TKA. Navigation was used not only for TKA but also for extra\u2010articular corrective osteotomies. The osteotomy site was fixed with a cemented stem and metaphyseal sleeve. The postoperative hip\u2013knee\u2013ankle angle was 1\u00b0 varus, the femoral implant was implanted at 0.5\u00b0 varus\/0.5\u00b0 flexion, and the tibial implant was implanted at 0.5\u00b0 varus\/0\u00b0 posterior slope. Two years after surgery, improvements were obtained in the range of motion from 15\u00b0\u201395\u00b0 to 0\u00b0\u2013110\u00b0, the Knee Society Score from 39 to 92 points, and the functional score from 35 to 100 points.<\/jats:p><jats:p><jats:bold>Conclusions:<\/jats:bold> One\u2010stage TKA with extra\u2010articular corrective osteotomy achieved good clinical results due to accurate alignment using navigation and firm fixation of the osteotomy site using cemented\u2010stem and metaphyseal sleeve without any fixation devices.<\/jats:p>","DOI":"10.1155\/2024\/6699418","type":"journal-article","created":{"date-parts":[[2024,7,25]],"date-time":"2024-07-25T11:33:45Z","timestamp":1721907225000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Navigation\u2010Assisted One\u2010Stage Total Knee Arthroplasty With Extra\u2010Articular Corrective Osteotomy for Knee Osteoarthritis With Femoral and Tibial Extra\u2010Articular Deformity: A Case Report"],"prefix":"10.1155","volume":"2024","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2766-5937","authenticated-orcid":false,"given":"Mitsuhiko","family":"Kubo","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sho","family":"Hirobe","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tsutomu","family":"Maeda","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kosuke","family":"Kumagai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasutaka","family":"Amano","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuki","family":"Nosaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takahide","family":"Hasegawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shinji","family":"Imai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,7,25]]},"reference":[{"key":"e_1_2_10_1_2","first-page":"1769","article-title":"Total knee arthroplasty for arthritis of the knee with extra-articular deformity","volume":"84","author":"Wang J. 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