{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,25]],"date-time":"2026-10-25T18:33:56Z","timestamp":1792953236359,"version":"4.5.0"},"reference-count":31,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T00:00:00Z","timestamp":1792627200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"name":"FORE (Foundation for Research and Teaching in Orthopedics, Sports Medicine, Trauma, and Imaging in the Musculoskeletal System","award":["Grant # FORE 2025-33"],"award-info":[{"award-number":["Grant # FORE 2025-33"]}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Shoulder &amp; Elbow"],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Due to limitations of the original Grammont reverse shoulder arthroplasty (RSA) design, there has been a shift towards more anatomical implants with greater lateralization and distalization. The lateralization shoulder angle (LSA) and distalization shoulder angle (DSA) were introduced as standardized measurements of these parameters. However, their prognostic value remains controversial. This study evaluates whether LSA and DSA are correlated with range of motion (ROM), clinical outcome scores, and complications following RSA.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This systematic review followed Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and was registered with PROSPERO. PubMed, Embase, and Scopus were searched from inception to April 29, 2024. Studies reporting association between LSA and\/or DSA, and post-RSA ROM and\/or clinical outcomes were included. Risk of bias was assessed using QUIPS and quality of evidence using GRADE framework.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Twelve studies comprising 2303 subjects (mean age 71.7 years, 62.6% females) were included. LSA and DSA were significantly correlated with acromial stress, scapular spine fractures, and deltoid stiffness. Neither parameter was significantly associated with ROM or clinical outcome scores. Quality of evidence ranged from \u201clow\u201d to \u201cvery low.\u201d<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Although LSA and DSA are simple and reproducible measures, their prognostic value for post-RSA ROM and clinical outcomes remains inconsistent.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/17585732261497964","type":"journal-article","created":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T13:18:02Z","timestamp":1792675082000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["The impact of lateralization and distalization shoulder angles\u2014A systematic review of range of motion and clinical outcomes following reverse shoulder arthroplasty"],"prefix":"10.1177","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7750-4456","authenticated-orcid":false,"given":"Sean Kean Ann","family":"Phua","sequence":"first","affiliation":[{"name":"Tan Tock Seng Hospital","place":["Singapore"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tse Kiat","family":"Soong","sequence":"additional","affiliation":[{"name":"Ministry of Health Holdings","place":["Singapore"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2797-8936","authenticated-orcid":false,"given":"Alexandre","family":"L\u00e4dermann","sequence":"additional","affiliation":[{"name":"H\u00f4pital de La Tour","place":["Switzerland"]},{"name":"Faculty of Medicine, University of Geneva, Geneva, Switzerland"},{"name":"Division of Orthopaedics and Trauma Surgery, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland"},{"name":"FORE (Foundation for Research and Teaching in Orthopedics, Sports Medicine, Trauma, and Imaging in the Musculoskeletal System), Meyrin, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sean Wei Loong","family":"Ho","sequence":"additional","affiliation":[{"name":"Tan Tock Seng Hospital","place":["Singapore"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,10,22]]},"reference":[{"key":"e_1_3_2_2_2","first-page":"1697","article-title":"The reverse shoulder prosthesis for glenohumeral arthritis associated with severe rotator cuff deficiency: a minimum two-year follow-up study of sixty patients","volume":"87","author":"Frankle M","year":"2005","unstructured":"Frankle M, Siegal S, Pupello D, et al. The reverse shoulder prosthesis for glenohumeral arthritis associated with severe rotator cuff deficiency: a minimum two-year follow-up study of sixty patients. 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Onlay versus inlay humeral stem in reverse shoulder arthroplasty (RSA): clinical and biomechanical study. 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