{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,15]],"date-time":"2026-03-15T18:04:26Z","timestamp":1773597866388,"version":"3.50.1"},"reference-count":23,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2014,2,1]],"date-time":"2014-02-01T00:00:00Z","timestamp":1391212800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2014,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The purpose of this study was to estimate the radiographic prevalence of CAM\u2010type femoroacetabular impingement (FAI) in elderly patients (\u226550 years) who have undergone internal fixation for femoral neck fracture.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A total of 187 frog\u2010leg lateral radiographs of elderly patients who underwent internal fixation for a femoral neck fracture were reviewed by two independent reviewers. The alpha angle, beta angle, and femoral head\u2013neck offset ratio were calculated. The presence of two abnormal radiographic parameters was deemed to be diagnostic of radiographic CAM\u2010type impingement.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Radiographic CAM\u2010type FAI was identified in 157 out of 187 (84 %) patients who underwent internal fixation for fractures of the femoral neck. Moderate\u2010to\u2010good inter\u2010observer reliability was achieved in the measurement of radiographic parameters. With reference to fracture subtypes and prevalence of radiographic features of CAM\u2010type morphology, 97 (72 %) out of 134 patients were positive for CAM in Garden subtypes I and II, whereas 49 (85.9 %) out of 57 patients had radiographic CAM in Garden III and IV subtypes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>There was a high prevalence of CAM\u2010type FAI in patients that underwent surgical fixation of femoral neck fractures. This is significantly higher than the reported prevalence in non\u2010fracture patient populations. The high prevalence of CAM morphology could be related to several factors, including age, fracture morphology, quality of reduction, type of fixation, and fracture healing.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>IV.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-014-2835-6","type":"journal-article","created":{"date-parts":[[2014,1,31]],"date-time":"2014-01-31T16:57:07Z","timestamp":1391187427000},"page":"793-800","source":"Crossref","is-referenced-by-count":16,"title":["Radiographic prevalence of CAM\u2010type femoroacetabular impingement after open reduction and internal fixation of femoral neck fractures"],"prefix":"10.1002","volume":"22","author":[{"given":"G.","family":"Mathew","sequence":"first","affiliation":[{"name":"Division of Orthopaedic Surgery Department of Surgery McMaster University 1200\u00a0Main Street West, 4E15 L8N 3Z5 Hamilton ON Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Kowalczuk","sequence":"additional","affiliation":[{"name":"Division of Orthopaedic Surgery Department of Surgery McMaster University 1200\u00a0Main Street West, 4E15 L8N 3Z5 Hamilton ON Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B.","family":"Hetaimish","sequence":"additional","affiliation":[{"name":"Orthopaedic Surgery Department College of Medicine Taibah University Al\u2010Madina Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Bedi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery University of Michigan Ann Arbor MI USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. J.","family":"Philippon","sequence":"additional","affiliation":[{"name":"Steadman Philippon Research Institute Vail CO USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Bhandari","sequence":"additional","affiliation":[{"name":"Division of Orthopaedic Surgery Department of Surgery McMaster University 1200\u00a0Main Street West, 4E15 L8N 3Z5 Hamilton ON Canada"},{"name":"Department of Clinical Epidemiology and Biostatistics McMaster University Hamilton ON Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"N.","family":"Simunovic","sequence":"additional","affiliation":[{"name":"Department of Clinical Epidemiology and Biostatistics McMaster University Hamilton ON Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Crouch","sequence":"additional","affiliation":[{"name":"Division of Orthopaedic Surgery Department of Surgery McMaster University 1200\u00a0Main Street West, 4E15 L8N 3Z5 Hamilton ON Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"O. 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