{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T02:05:43Z","timestamp":1783649143612,"version":"3.55.0"},"reference-count":33,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2021,9,26]],"date-time":"2021-09-26T00:00:00Z","timestamp":1632614400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JPM"],"abstract":"<jats:p>The risk of non-union and prolonged periods of protected weight-bearing still remain unsolved issues after distal femur osteotomy (DFO). To improve the stability, we developed the double chevron-cut technique, which is a modified medial closing-wedge DFO guided by a patient-specific instrument. The purpose of this study was to investigate the feasibility and outcome of this operative approach. Twenty-five knees in twenty-three consecutive patients with genu valgum and lateral compartment osteoarthritis that received double chevron-cut DFO were included. The target of correction was 50% on the weight-bearing line (WBL) ratio. Patient-reported outcomes included the Oxford Knee Score (OKS) and the 2011 Knee Society Score (KSS). The mean of the WBL ratio was corrected from 78.7% \u00b1 12.0% to 48.7% \u00b1 2.9% postoperatively. The mean time to full weight bearing was 3.7 \u00b1 1.4 weeks. Union of the osteotomy was achieved at 11.3 \u00b1 2.8 weeks. At a mean follow-up of 17 months, the OKS improved from a mean of 27.6 \u00b1 11.7 to 39.1 \u00b1 7.5 (p = 0.03), and the KSS from a mean of 92.1 \u00b1 13.0 to 143.9 \u00b1 10.2 (p &lt; 0.001). Three patients developed complications, including one case of peri-implant fracture, one of loss of fixation, and one of non-union. The double chevron-cut DFO followed by immediate weight-bearing as tolerated is effective in treating genu valgum deformity and associated lateral compartment osteoarthritis.<\/jats:p>","DOI":"10.3390\/jpm11100959","type":"journal-article","created":{"date-parts":[[2021,9,27]],"date-time":"2021-09-27T04:55:33Z","timestamp":1632718533000},"page":"959","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Patient-Specific Instrument Guided Double Chevron-Cut Distal Femur Osteotomy"],"prefix":"10.3390","volume":"11","author":[{"given":"Yen-Chun","family":"Huang","sequence":"first","affiliation":[{"name":"School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3530-0604","authenticated-orcid":false,"given":"Kuan-Jung","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan"},{"name":"Department of Orthopedics and Traumatology, Taipei Veterans General Hospital, Taipei 112, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kuan-Yu","family":"Lin","sequence":"additional","affiliation":[{"name":"Department of Orthopedics, Kaohsiung Veterans General Hospital, Kaohsiung 813414, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oscar Kuang-Sheng","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Taipei Veterans General Hospital, Taipei 112, Taiwan"},{"name":"Department of Orthopedics, China Medical University Hospital, Taichung 114, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9301-8116","authenticated-orcid":false,"given":"Jesse Chieh-Szu","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan"},{"name":"Department of Orthopedics and Traumatology, Taipei Veterans General Hospital, Taipei 112, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"953","DOI":"10.1016\/j.otsr.2017.03.020","article-title":"Failure of high tibial varus osteotomy for lateral tibio-femoral osteoarthritis with <10\u00b0 of valgus: Outcomes in 19 patients","volume":"103","author":"Mirouse","year":"2017","journal-title":"Orthop. 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