{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,20]],"date-time":"2026-07-20T21:01:51Z","timestamp":1784581311233,"version":"3.55.0"},"reference-count":23,"publisher":"Ovid Technologies (Wolters Kluwer Health)","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Traumatic posterior shoulder dislocation is rare, and the role of posterior acromial morphology in acute traumatic posterior dislocation is unknown. We compared posterior acromial morphology in first-time traumatic posterior versus first-time traumatic anterior dislocations.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>In this retrospective comparative cohort study, 34 consecutive patients with a first-time acute traumatic posterior shoulder dislocation were compared with 34 consecutive patients with a first-time acute traumatic anterior shoulder dislocation. The posterior dislocation cohort included 26 males and 8 females, with a mean age of 43.4 \u00b1 16.5 years, and the anterior dislocation cohort included 29 males and 5 females, with a mean age of 41.3 \u00b1 15.4 years. Posterior acromial tilt (PAT), posterior acromial coverage (PAC), posterior acromial height (PAH), and the critical shoulder angle (CSA) were measured on standardized radiographs. Comparisons between the groups were performed, and logistic regression analyses were used to assess associations between acromial morphology parameters and posterior dislocation. Interobserver and intraobserver reliability were assessed using intraclass correlation coefficients.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Compared with the anterior dislocation group, patients with posterior dislocation demonstrated a significantly higher PAT (65.8\u00b0 \u00b1 6.7\u00b0 versus 58.9\u00b0 \u00b1 8.4\u00b0, p &lt; 0.001), lower PAC (55.6\u00b0 \u00b1 6.6\u00b0 versus 59.5\u00b0 \u00b1 8.4\u00b0, p = 0.038), greater PAH (27.0 \u00b1 4.2 versus 22.0 \u00b1 6.7 mm, p &lt; 0.001), and smaller CSA (32.9\u00b0 \u00b1 4.0\u00b0 versus 35.5\u00b0 \u00b1 4.1\u00b0, p = 0.009). Logistic regression showed that higher PAH and PAT were most strongly associated with posterior dislocation. Measurement reliability was good to excellent for all parameters.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Acute traumatic posterior shoulder dislocation is associated with distinct posterior acromial morphology similar to that described in recurrent posterior instability.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence:<\/jats:title>\n                    <jats:p>\n                      Diagnostic\n                      <jats:underline>Level IV<\/jats:underline>\n                      . See Instructions for Authors for a complete description of levels of evidence.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.2106\/jbjs.26.00036","type":"journal-article","created":{"date-parts":[[2026,7,20]],"date-time":"2026-07-20T20:04:07Z","timestamp":1784577847000},"update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":0,"title":["Traumatic Posterior Dislocation Is Associated with Posterior Acromial Morphology"],"prefix":"10.2106","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1123-1758","authenticated-orcid":false,"given":"Jean-David","family":"Werthel","sequence":"first","affiliation":[{"name":"H\u00f4pital Ambroise Par\u00e9, Boulogne-Billancourt, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9555-3198","authenticated-orcid":false,"given":"Alexander","family":"Vervaecke","sequence":"additional","affiliation":[{"name":"H\u00f4pital Ambroise Par\u00e9, Boulogne-Billancourt, France"},{"name":"Monica Orthopaedic Research (MoRe) Foundation, Antwerp, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-4730-3935","authenticated-orcid":false,"given":"Matteo","family":"Petit","sequence":"additional","affiliation":[{"name":"H\u00f4pital Ambroise Par\u00e9, Boulogne-Billancourt, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4493-5495","authenticated-orcid":false,"given":"Omid","family":"Jamei-Martel","sequence":"additional","affiliation":[{"name":"H\u00f4pital Ambroise Par\u00e9, Boulogne-Billancourt, France"},{"name":"R\u00e9seau Hospitalier Neuch\u00e2telois, Neuch\u00e2tel, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4624-8285","authenticated-orcid":false,"given":"Christian","family":"Gerber","sequence":"additional","affiliation":[{"name":"Balgrist 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