{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T18:01:47Z","timestamp":1790013707500,"version":"4.0.1"},"reference-count":28,"publisher":"SAGE Publications","issue":"2","license":[{"start":{"date-parts":[[2026,2,1]],"date-time":"2026-02-01T00:00:00Z","timestamp":1769904000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,2,1]],"date-time":"2026-02-01T00:00:00Z","timestamp":1769904000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Journal of Sports Medicine"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Heterotopic ossification (HO) frequently occurs after treatments for acute acromioclavicular (AC) joint dislocations, and is often considered a complication.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Hypothesis\/Purpose:<\/jats:title>\n                    <jats:p>This study aimed to evaluate and compare HO severity and configuration after single-suture button (SSB) and double-suture button (DSB) stabilization, and nonoperative treatment. It was hypothesized that the extent of HO after Rockwood (RW) type V injuries is associated with increased vertical stability, without substantially impairing clinical results.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Cohort study; Level of evidence, 3.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Patients with acute RW type V dislocations treated with SSB (group 1), DSB (group 2), or nonoperatively (group 3) were analyzed with a 2-year follow-up. The exclusion criteria were previous shoulder surgery or concomitant fractures. HO was evaluated on anteroposterior stress radiographs in the conoid ligament area (CLA) and trapezoid ligament area (TLA), graded by severity and configuration. Radiographic parameters (coracoclavicular difference, RW classification, DPT, and osteoarthritis) and clinical outcomes (Constant Score, Subjective Shoulder Value, Taft score (TF), and Acromioclavicular Joint Instability score were assessed. Group differences were tested using the Kruskal-Wallis test, and associations between HO severity and outcomes were assessed using linear regression.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      A total of 85 patients were included (group 1, n = 36; group 2, n = 28; and group 3, n = 21), with a mean age of 39.3 \u00b1 11 and a mean follow-up of 44 \u00b1 21.5 months. HO occurred in 71.3% of cases (CLA) and 58.7% of cases (TLA), with no group differences (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .390). Severity was predominantly mild across all groups, and the configuration was mostly clavicular. Severity showed no group difference (CLA,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .703; TLA,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .132). Configuration differed for the TLA (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .042), but not for the CLA (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .178). Severity of HO in the CLA correlated with higher TF scores (B = 0.902;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .003), whereas TLA severity correlated negatively (B = \u22120.823;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .034).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>\n                      When present, HO was mostly mild and clavicular, without relevant radiographic or clinical effects. Severity in the CLA correlated with a higher TF, whereas severity in the TLA correlated negatively. Given that the other radiographic and clinical parameters are unaffected, the term\n                      <jats:italic toggle=\"yes\">complication<\/jats:italic>\n                      should be used with caution.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/23259671251408491","type":"journal-article","created":{"date-parts":[[2026,2,27]],"date-time":"2026-02-27T21:58:53Z","timestamp":1772229533000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Heterotopic Ossification After Acute Acromioclavicular Joint Dislocation\u2014Effect on Radiographic and Clinical Outcomes"],"prefix":"10.1177","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1622-3885","authenticated-orcid":false,"given":"Larissa","family":"Eckl","sequence":"first","affiliation":[{"name":"Sports Orthopedics Section, TUM Klinikum rechts der Isar, Munich, Germany"},{"name":"Department of Shoulder and Elbow Surgery, Schulthess Clinic, Zurich, Switzerland"},{"name":"Department of Shoulder and Elbow Surgery, Center for Musculoskeletal Surgery, Charit\u00e9 Universitaetsmedizin Berlin, Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonas","family":"Pawelke","sequence":"additional","affiliation":[{"name":"Department of Shoulder and Elbow Surgery, Center for Musculoskeletal Surgery, Charit\u00e9 Universitaetsmedizin Berlin, Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philipp","family":"Vetter","sequence":"additional","affiliation":[{"name":"Department of Shoulder and Elbow Surgery, Schulthess Clinic, Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Agahan","family":"Hayta","sequence":"additional","affiliation":[{"name":"Department of Shoulder and Elbow Surgery, Center for Musculoskeletal Surgery, Charit\u00e9 Universitaetsmedizin Berlin, Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Doruk","family":"Akg\u00fcn","sequence":"additional","affiliation":[{"name":"Department of Shoulder and Elbow Surgery, Center for Musculoskeletal Surgery, Charit\u00e9 Universitaetsmedizin Berlin, Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Asimina","family":"Lazaridou","sequence":"additional","affiliation":[{"name":"Department of Research Upper Extremities &amp; Hand, Schulthess Clinic, Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Markus","family":"Scheibel","sequence":"additional","affiliation":[{"name":"Department of Shoulder and Elbow Surgery, Schulthess Clinic, Zurich, Switzerland"},{"name":"Department of Shoulder and Elbow Surgery, Center for Musculoskeletal Surgery, Charit\u00e9 Universitaetsmedizin Berlin, Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,2,27]]},"reference":[{"issue":"2","key":"e_1_3_2_2_2","first-page":"34","article-title":"Radiography of the acromioclavicular articulation","volume":"30","author":"Alexander OM.","year":"1954","unstructured":"Alexander OM. Radiography of the acromioclavicular articulation. Med Radiogr Photogr. 1954;30(2):34-39.","journal-title":"Med Radiogr Photogr"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2012.11.023"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2023.05.014"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1186\/s12891-022-05935-0"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jse.2021.12.003"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-197355080-00006"},{"key":"e_1_3_2_8_2","doi-asserted-by":"publisher","DOI":"10.1155\/2013\/171609"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-198701000-00023"},{"key":"e_1_3_2_10_2","doi-asserted-by":"publisher","DOI":"10.1114\/1.1304848"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jseint.2022.04.009"},{"key":"e_1_3_2_12_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-198668030-00019"},{"key":"e_1_3_2_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jse.2007.07.017"},{"key":"e_1_3_2_14_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-017-4717-1"},{"key":"e_1_3_2_15_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11678-018-0469-x"},{"key":"e_1_3_2_16_2","doi-asserted-by":"publisher","DOI":"10.1097\/BOT.0000000000000437"},{"key":"e_1_3_2_17_2","doi-asserted-by":"publisher","DOI":"10.1097\/CM9.0000000000003244"},{"key":"e_1_3_2_18_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11678-019-0506-4"},{"key":"e_1_3_2_19_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-011-1627-5"},{"key":"e_1_3_2_20_2","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.N.01056"},{"key":"e_1_3_2_21_2","first-page":"860","volume-title":"Fractures in Adults","author":"Rockwood CA.","year":"1984","unstructured":"Rockwood CA. Injuries to the acromioclavicular joint. In: Rockwood CA, Green DP, eds. Fractures in Adults. Philadelphia, PA: Lippincott;1984;860-910."},{"key":"e_1_3_2_22_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546511399379"},{"key":"e_1_3_2_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2017.02.003"},{"key":"e_1_3_2_24_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-198769070-00013"},{"key":"e_1_3_2_25_2","doi-asserted-by":"publisher","DOI":"10.1177\/23259671231190411"},{"key":"e_1_3_2_26_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546515615583"},{"key":"e_1_3_2_27_2","doi-asserted-by":"publisher","DOI":"10.2147\/OAJSM.S73211"},{"key":"e_1_3_2_28_2","doi-asserted-by":"publisher","DOI":"10.3389\/fcell.2022.770931"},{"key":"e_1_3_2_29_2","doi-asserted-by":"publisher","DOI":"10.1177\/23259671211060040"}],"container-title":["Orthopaedic Journal of Sports Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/23259671251408491","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/23259671251408491","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/23259671251408491","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:31:54Z","timestamp":1777595514000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/23259671251408491"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,2]]},"references-count":28,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2026,2]]}},"alternative-id":["10.1177\/23259671251408491"],"URL":"https:\/\/doi.org\/10.1177\/23259671251408491","relation":{},"ISSN":["2325-9671","2325-9671"],"issn-type":[{"value":"2325-9671","type":"print"},{"value":"2325-9671","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,2]]},"article-number":"23259671251408491"}}