{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,9]],"date-time":"2025-06-09T04:10:01Z","timestamp":1749442201906,"version":"3.41.0"},"reference-count":39,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2025,5,1]],"date-time":"2025-05-01T00:00:00Z","timestamp":1746057600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["YG2023ZD15"],"award-info":[{"award-number":["YG2023ZD15"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["31900941"],"award-info":[{"award-number":["31900941"]}],"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":[[2025,6]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>The combined anteversion technique was introduced to guide prosthesis orientation in patients with developmental dysplasia of the hip and has achieved favorable short\u2010term results in a previously published series. However, excessive variations in implant orientation may increase the risk of accelerated polyethylene wear and lead to revision THA. This study aimed to report whether the variation in implant orientation caused by the combined anteversion technique would result in an increased surgical failure rate and the mid\u2010 to long\u2010term clinical outcome in total hip arthroplasty for patients with hip dysplasia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>This retrospective study reviewed patients with hip dysplasia who underwent total hip arthroplasty with the combined anteversion technique between 2007 and 2012 at our center. The surgical protocol prioritized the combined anteversion principle, requiring maintenance of the combined anteversion within the 25\u00b0\u201350\u00b0 range while permitting physiological variation in individual femoral or acetabular component positioning. In total, 55 patients (80 hips) were included, with an average follow\u2010up period of 12.7\u2009years (range, 11 to 16). Ceramic fragmentation, periprosthetic radiolucencies, and osteolysis around the cup and stem were evaluated based on the immediate postoperative pelvic anteroposterior radiographs and the last follow\u2010up. Femoral, acetabular, and combined anteversions pre\u2010and postoperatively were measured using CT\u2010based models. The Harris hip score at the latest follow\u2010up was used for comparison with the score before surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The average Harris hip score increased from 28.3\u2009\u00b1\u200910.1 preoperatively to 91.2\u2009\u00b1\u20096.7 (<jats:italic>p<\/jats:italic> &lt;\u20090.01) at the last follow\u2010up. The mean femoral, acetabular, and combined anteversions were 25.6\u00b0\u2009\u00b1\u200911.1\u00b0 and 23.7\u00b0\u2009\u00b1\u200910.6\u00b0, 23.2\u00b0\u2009\u00b1\u20097.4\u00b0 and 19.8\u00b0\u2009\u00b1\u20098.3\u00b0, and 48.7\u00b0\u2009\u00b1\u200912.9\u00b0 and 43.1\u00b0\u2009\u00b1\u20096.8\u00b0 preoperatively and postoperatively, respectively. By the last follow\u2010up, one patient developed periprosthetic osteolysis 11\u2009years after primary surgery without obvious periprosthetic loosening and migration of the femoral head rotation center. Two patients experienced prosthesis dislocation, one of whom received a revision 4\u2009years after primary surgery, and the other underwent manual reduction under anesthesia 8\u2009years after primary surgery. Two patients underwent revision and internal fixation due to prosthesis loosening caused by a periprosthetic fracture 10\u2009years and 12\u2009years after primary surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The combined anteversion technique in total hip arthroplasty for patients with hip dysplasia yielded reliable mid\u2010to\u2010long\u2010term results. This technique's changes in prosthesis angle did not significantly increase the surgical failure rate.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.70058","type":"journal-article","created":{"date-parts":[[2025,5,2]],"date-time":"2025-05-02T11:59:30Z","timestamp":1746187170000},"page":"1761-1768","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Impact of Prosthetic Angle Variations in Combined Anteversion Technique on Surgical Failure Rates in Developmental Dysplasia of the Hip: A 12\u2010Year Follow\u2010Up Study"],"prefix":"10.1111","volume":"17","author":[{"given":"Hua","family":"Qiao","sequence":"first","affiliation":[{"name":"Shanghai Key Laboratory of Orthopedics Implants, Shanghai Ninth People's Hospital, Department of Orthopaedics Surgery Shanghai Jiaotong University School of Medicine  Shanghai People's Republic of 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