{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T10:54:51Z","timestamp":1778324091030,"version":"3.51.4"},"reference-count":24,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2024,4,8]],"date-time":"2024-04-08T00:00:00Z","timestamp":1712534400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2024,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>This study aims to identify preoperative risk factors for iliopsoas tendonitis after total hip arthroplasty, a complication typically attributed to acetabular cup position and orientation, using a validated iliopsoas impingement detection simulation. Analyzing CT scans and X\u2010rays of 448 patients using a validated preoperative planning protocol, patients were simulated for iliopsoas impingement and categorized into at\u2010risk and not at\u2010risk groups based on a prior validation study, with a 23% at\u2010risk incidence. Implementing a propensity score matching algorithm to reduce covariate imbalance, we identified factors that may exacerbate risk of iliopsoas tendonitis. Parameters that were investigated included standing pelvic tilt, functional femoral rotation, and the difference between the planned acetabular cup diameter and native femoral head diameter (\u0394C\u2010NFH). Comparing pelvic tilt, we found a significant difference between the groups (at\u2010risk: \u22126.0\u00b0, not at\u2010risk: \u22120.7\u00b0; <jats:italic>p\u2009<\/jats:italic>&lt;&lt;\u20090.01). A similar trend was noted for \u0394C\u2010NFH (at\u2010risk: +5.7\u2009mm, not at\u2010risk: +5.1\u2009mm; <jats:italic>p<\/jats:italic>\u2009=\u20090.01). Additional simulations of at\u2010risk patients indicated increased anteversion of the acetabular cup reduces impingement risk more effectively than medialisation. These findings suggest that spinopelvic parameters may exacerbate iliopsoas irritation risk, underscoring their importance in preoperative planning and patient expectation management. Similar findings of a greater than 6\u2009mm difference between cup size and native femoral head diameter being a significant risk for iliopsoas tendonitis have been observed before, underscoring its potential veracity. These results may provide surgeons with a simple threshold that can be used in determining a cup size to reduce the risk of iliopsoas tendonitis.<\/jats:p>","DOI":"10.1002\/jor.25856","type":"journal-article","created":{"date-parts":[[2024,4,8]],"date-time":"2024-04-08T12:34:37Z","timestamp":1712579677000},"page":"2035-2042","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Determination of preoperative risk factors for iliopsoas tendonitis after total hip arthroplasty: A\u00a0simulation study"],"prefix":"10.1002","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8502-9088","authenticated-orcid":false,"given":"Max","family":"Hardwick\u2010Morris","sequence":"first","affiliation":[{"name":"360 Med Care Sydney New South Wales Australia"},{"name":"Enovis Sydney New South Wales Australia"},{"name":"College of Science and Engineering Flinders University Adelaide South Australia Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0063-0435","authenticated-orcid":false,"given":"Joshua","family":"Twiggs","sequence":"additional","affiliation":[{"name":"360 Med Care Sydney New South Wales Australia"},{"name":"Enovis Sydney New South Wales Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brad","family":"Miles","sequence":"additional","affiliation":[{"name":"360 Med Care Sydney New South Wales Australia"},{"name":"Enovis Sydney New South Wales Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6412-6057","authenticated-orcid":false,"given":"Rami M. A.","family":"Al\u2010Dirini","sequence":"additional","affiliation":[{"name":"College of Science and Engineering Flinders University Adelaide South Australia Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7842-6472","authenticated-orcid":false,"given":"Mark","family":"Taylor","sequence":"additional","affiliation":[{"name":"College of Science and Engineering Flinders University Adelaide South Australia Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3822-167X","authenticated-orcid":false,"given":"Jitendra","family":"Balakumar","sequence":"additional","affiliation":[{"name":"Melbourne Orthopaedic Group Melbourne Victoria Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9413-0871","authenticated-orcid":false,"given":"William L.","family":"Walter","sequence":"additional","affiliation":[{"name":"Institute of Bone and 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