{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,15]],"date-time":"2026-03-15T21:40:09Z","timestamp":1773610809991,"version":"3.50.1"},"reference-count":23,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2012,1,28]],"date-time":"2012-01-28T00:00:00Z","timestamp":1327708800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/2.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2012,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Reduction in anterior cruciate ligament (ACL) injuries in young, active individuals continues to be a major goal in sports medicine. The purpose of this study was to determine the head\u2013neck offset, as measured by AP pelvis alpha angles, in patients presenting to a single surgeon with isolated ACL and non\u2010ACL knee injuries.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In a group of 48 patients with complete, primary ACL rupture and 42 controls with non\u2010ACL injury (i.e., meniscus tear, cartilage defect), a single surgeon, blinded to the diagnosis, took radiographic measures of the AP alpha angle of both hips and the weight\u2010bearing line at both knees. All knee pathology was confirmed with knee arthroscopy. Inclusion criteria included no previous hip or knee surgery, and long\u2010leg standing alignment radiographic series completed at index visit.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>There was no difference in gender distribution, height, BMI or age between groups. ACL\u2010injured patients had a significantly higher alpha angle (mean = 84, SD = 14) on the injured side than the controls (mean = 59, SD = 7, <jats:italic>p<\/jats:italic> &lt; 0.0001). Ninety\u2010four percent of the ACL\u2010injured group had alpha angles over 60\u00b0, while only 35% of the non\u2010ACL\u2010injured group had alpha angles over 60\u00b0 (<jats:italic>p<\/jats:italic> = 0.001). Those patients with alpha angle over 60\u00b0 were 27 times more likely (95% CI 6.4\u2013131) to be in the ACL injury group than those patients with alpha angle 60\u00b0 or less (<jats:italic>p<\/jats:italic> = 0.001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Our findings establish an important preliminary correlation between ACL injury and diminished femoral head\u2013neck offset, as characterized by abnormal, elevated alpha angles.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>Prognostic study, Level III.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-012-1881-1","type":"journal-article","created":{"date-parts":[[2012,1,27]],"date-time":"2012-01-27T04:02:54Z","timestamp":1327636974000},"page":"2585-2589","source":"Crossref","is-referenced-by-count":25,"title":["Decreased femoral head\u2013neck offset: a possible risk factor for ACL injury"],"prefix":"10.1002","volume":"20","author":[{"given":"Marc","family":"Philippon","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Steadman Philippon Research Institute Clinical Research, 181 W. Meadow Drive, Suite 1000 81657 Vail CO USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher","family":"Dewing","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Naval Medical Center San Diego CA USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karen","family":"Briggs","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Steadman Philippon Research Institute Clinical Research, 181 W. Meadow Drive, Suite 1000 81657 Vail CO USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. Richard","family":"Steadman","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Steadman Philippon Research Institute Clinical Research, 181 W. Meadow Drive, Suite 1000 81657 Vail CO USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2012,1,28]]},"reference":[{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999\u2010010\u20101624\u2010x"},{"key":"e_1_2_7_3_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546507304141"},{"key":"e_1_2_7_4_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546508328107"},{"key":"e_1_2_7_5_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-199201000-00025"},{"key":"e_1_2_7_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167\u2010010\u20101175\u20104"},{"key":"e_1_2_7_7_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546508319898"},{"key":"e_1_2_7_8_2","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000096804.78689.c2"},{"key":"e_1_2_7_9_2","unstructured":"GiradJ KrantzN BocquetD WavreilleG MiguadH(2011)Femoral head to neck offset after hip resurfacing is critical for range of motion.Clin Biomech (Bristol Avon) PMID:21925779"},{"key":"e_1_2_7_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2008.05.012"},{"key":"e_1_2_7_11_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301\u2010620X.89B10.19405"},{"key":"e_1_2_7_12_2","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.H.01674"},{"key":"e_1_2_7_13_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546506286866"},{"key":"e_1_2_7_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2008.01.010"},{"key":"e_1_2_7_15_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546507308934"},{"key":"e_1_2_7_16_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.clinbiomech.2008.02.009"},{"key":"e_1_2_7_17_2","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000201168.72388.24"},{"key":"e_1_2_7_18_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301\u2010620X.84B4.12014"},{"key":"e_1_2_7_19_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546503261724"},{"key":"e_1_2_7_20_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301\u2010620X.91B1.21329"},{"key":"e_1_2_7_21_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167\u2010007\u20100348\u20102"},{"key":"e_1_2_7_22_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546509346393"},{"key":"e_1_2_7_23_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546509334225"},{"key":"e_1_2_7_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2008.06.019"}],"container-title":["Knee Surgery, Sports Traumatology, Arthroscopy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1007\/s00167-012-1881-1","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T10:45:36Z","timestamp":1760870736000},"score":1,"resource":{"primary":{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/10.1007\/s00167-012-1881-1"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,1,28]]},"references-count":23,"journal-issue":{"issue":"12","published-print":{"date-parts":[[2012,12]]}},"alternative-id":["10.1007\/s00167-012-1881-1"],"URL":"https:\/\/doi.org\/10.1007\/s00167-012-1881-1","archive":["Portico"],"relation":{},"ISSN":["0942-2056","1433-7347"],"issn-type":[{"value":"0942-2056","type":"print"},{"value":"1433-7347","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,1,28]]}}}