{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,5]],"date-time":"2025-08-05T13:11:30Z","timestamp":1754399490128,"version":"3.38.0"},"reference-count":30,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T00:00:00Z","timestamp":1737331200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82072464","82272558"],"award-info":[{"award-number":["82072464","82272558"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2025,3]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>Determining the optimal osteotomy length for patients with unilateral Crowe\u2010IV developmental dysplasia of the hip undergoing subtrochanteric osteotomy remains challenging due to the significant variability in pelvic and spinal alignment. Incorrect osteotomy length, compounded by pelvic or spinal tilt, can adversely affect postoperative gait and long\u2010term outcomes. Therefore, this study could introduce a method to calculate the osteotomy length for patients with unilateral Crowe\u2010IV developmental dysplasia of the hip, correcting spinal and pelvic tilt, and improving patient gait.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This is a retrospective study that included 28 patients with unilateral Crowe\u2010IV developmental dysplasia of the hip collected from June 2019 to June 2020, who underwent total hip arthroplasty with measured subtrochanteric osteotomy technique. The average follow\u2010up period was 4.3\u2009years (last follow\u2010up). Harris scores, pelvic tilt angles represented by iliac obliquity angle (IO) and sacral obliquity angle (SO), and postoperative complications were recorded. Statistical analysis was performed using independent sample <jats:italic>t<\/jats:italic>\u2010tests for normally distributed data and the Mann\u2013Whitney <jats:italic>U<\/jats:italic> test for non\u2010normally distributed data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Postoperatively, pelvic tilt angles improved significantly. The comparison of preoperative and postoperative 3\u2010month IO angles (8.77\u00b0\u2009\u00b1\u20093.31\u00b0 vs. 5.28\u00b0\u2009\u00b1\u20092.29\u00b0, <jats:italic>p<\/jats:italic>\u2009=\u20090.00), and postoperative 3\u2010month and last follow\u2010up (5.28\u00b0\u2009\u00b1\u20092.29\u00b0 vs. 2.88\u00b0\u2009\u00b1\u20091.39\u00b0, <jats:italic>p<\/jats:italic>\u2009=\u20090.00) showed statistically significant differences. Similarly, the comparison of preoperative and postoperative 3\u2010month SO angles (9.56\u00b0\u2009\u00b1\u20093.1\u00b0 vs. 5.81\u00b0\u2009\u00b1\u20092.78\u00b0, <jats:italic>p<\/jats:italic>\u2009=\u20090.00), and postoperative 3\u2010month and last follow\u2010up (5.81\u2009\u00b0\u00b1\u20092.78\u00b0 vs. 3.59\u00b0\u2009\u00b1\u20091.72\u00b0, <jats:italic>p<\/jats:italic>\u2009=\u20090.00) showed statistically significant differences. Harris scores significantly improved from preoperative to 1\u2010year postoperative (47.35\u2009\u00b1\u200912.32 vs. 80.5\u2009\u00b1\u20097.81, <jats:italic>p<\/jats:italic>\u2009=\u20090.00), and from 1\u2010year postoperative to last follow\u2010up (80.5\u2009\u00b1\u20097.81 vs. 90.78\u2009\u00b1\u20092.86, <jats:italic>p<\/jats:italic>\u2009=\u20090.00) with statistical significance. There were no significant differences in adverse event rates between the two groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Total hip arthroplasty combined with measurement subtrochanteric osteotomy technique improves pelvic tilt and Harris scores in Crowe\u2010IV developmental dysplasia patients. This technique may serve as a guideline for determining resection length.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.14330","type":"journal-article","created":{"date-parts":[[2025,1,21]],"date-time":"2025-01-21T00:09:21Z","timestamp":1737418161000},"page":"962-970","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Measure Subtrochanteric Osteotomy in Unilateral Crowe\u2010<scp>IV<\/scp> Dysplasia\u2010Surgical Technique"],"prefix":"10.1111","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3649-9902","authenticated-orcid":false,"given":"Runkai","family":"Zhao","sequence":"first","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1951-3669","authenticated-orcid":false,"given":"Yiming","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Te","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haichao","family":"Ren","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Runzhi","family":"Zhao","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The Army Medical University  Chongqing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zeyu","family":"Feng","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pengcheng","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shuai","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juntao","family":"Lu","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Menglin","family":"Fan","sequence":"additional","affiliation":[{"name":"Harbin Medical University Cancer Hospital  Harbin China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Quanbo","family":"Ji","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guoqiang","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery The General Hospital of the People's Liberation Army  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,1,20]]},"reference":[{"issue":"1","key":"e_1_2_9_2_1","first-page":"55","article-title":"Total Hip Replacement for Coxarthrosis Secondary to Congenital Dysplasia and Dislocation of the Hip. 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