{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T04:29:23Z","timestamp":1790742563242,"version":"4.1.0"},"reference-count":35,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2022,1,29]],"date-time":"2022-01-29T00:00:00Z","timestamp":1643414400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2022,1,29]],"date-time":"2022-01-29T00:00:00Z","timestamp":1643414400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2022,1,29]],"date-time":"2022-01-29T00:00:00Z","timestamp":1643414400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100002839","name":"Charit\u00e9 - Universit\u00e4tsmedizin Berlin","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100002839","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100002839","name":"Charit\u00e9 \u2013 Universit\u00e4tsmedizin Berlin","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002839","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2022,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Purpose of this study was to evaluate the mid\u2010 to long\u2010term outcome after conservatively treated first\u2010time posterior shoulder dislocations and to determine structural defects associated with failure.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this multi\u2010centric retrospective study, 29 shoulders in 28 patients with first\u2010time acute posterior shoulder dislocation (Type A1 or A2 according to the ABC classification) and available cross\u2010sectional imaging were included. Outcome scores as well as radiological and magnetic resonance imaging were obtained at a mean follow\u2010up of 8.3\u2009\u00b1\u20092.7 years (minimum: 5 years). The association of structural defects with redislocation, need for secondary surgery, and inferior clinical outcomes were analysed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Redislocation occurred in six (21%) shoulders and nine shoulders (31%) underwent secondary surgery due to persistent symptoms. The posttraumatic posterior glenohumeral subluxation was higher in the redislocation group compared to the no redislocation group; however, statistical significance was not reached (61.9\u2009\u00b1\u200912.5% vs. 50.6\u2009\u00b1\u20096.4%). Furthermore, a higher adapted gamma angle was observed in the failed conservative treatment group versus the conservative treatment group, similarly without statistically significant difference (97.8\u00b0\u2009\u00b1\u20097.2\u00b0, vs. 93.3\u00b0\u2009\u00b1\u20099.7\u00b0). The adapted gamma angle was higher than 90\u00b0 in all patients of failed conservative therapy and the redislocation group. An older age at the time of dislocation showed a significant correlation with better clinical outcomes (SSV: <jats:italic>r<\/jats:italic>\u2009=\u20090.543, <jats:italic>p<\/jats:italic>\u2009=\u20090.02; ROWE: <jats:italic>r<\/jats:italic>\u2009=\u20090.418, <jats:italic>p<\/jats:italic>\u2009=\u20090.035 and WOSI: <jats:italic>r<\/jats:italic>\u2009=\u20090.478, <jats:italic>p<\/jats:italic>\u2009=\u20090.045). Posterior glenohumeral subluxation after trauma correlated with a worse WOSI (<jats:italic>r<\/jats:italic>\u2009=\u2009\u2212 0.59, <jats:italic>p<\/jats:italic>\u2009=\u20090.02) and follow\u2010up posterior glenohumeral decentring (<jats:italic>r<\/jats:italic>\u2009=\u20090.68, <jats:italic>p<\/jats:italic>\u2009=\u20090.007). The gamma angle (<jats:italic>r<\/jats:italic>\u2009=\u20090.396, <jats:italic>p<\/jats:italic>\u2009=\u20090.039) and depth of the reverse Hill\u2013Sachs lesion (<jats:italic>r<\/jats:italic>\u2009=\u20090.437, <jats:italic>p<\/jats:italic>\u2009=\u20090.023) correlated significantly with the grade of osteoarthritis at follow\u2010up.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Conservative treatment is a viable option in patients with an acute traumatic posterior shoulder dislocation with good outcome after mid\u2010 and long\u2010term follow\u2010up especially in patients with centred joint, low gamma angle, and middle or old age.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>IV.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-022-06883-x","type":"journal-article","created":{"date-parts":[[2022,1,29]],"date-time":"2022-01-29T03:09:37Z","timestamp":1643425777000},"page":"2500-2509","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Conservative treatment of acute traumatic posterior shoulder dislocations (Type A) is a viable option especially in patients with centred joint, low gamma angle, and middle or old age"],"prefix":"10.1002","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0290-3452","authenticated-orcid":false,"given":"Christian","family":"Festbaum","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Shoulder and Elbow Surgery, Center for Musculoskeletal Surgery Charit\u00e9\u2010Universitaetsmedizin Berlin Campus Virchow, Augustenburger Platz 1 13353 Berlin 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