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Patients included were the Neer\u2013Horowitz (N\u2013H) type 2, 3, and 4 of fracture. The basic information of the patients was recorded, fracture healing and shoulder range of motion were assessed at the last follow-up visit. The disabilities of the arm, hand (DASH) score and Constant\u2014Murley score of the shoulder were performed to observe the occurrence of complications.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The mean age at the time of surgery was 12.41\u00a0years, and all patients completed a median follow-up of 18.18\u00a0months. There were two cases of N\u2013H type 2, 12 cases of N\u2013H type 3, and eight cases of N\u2013H type 4 among the patients. At the last follow-up, all patients were able to achieve pain-free shoulder movement. There was no significant difference in shoulder function between the injured side and the uninjured side. The DASH score mean was 2.43 (95% CI 1.44\u20133.52). The constant score mean was 98.55 (95% CI 97.73\u201399.27). All patients returned to their pre-injury daily life and physical activities, and there was no significant difference in bilateral limb length at the last follow-up (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). The most common complication of double-Schanz screw external fixator combined with anti-rotating Kirschner wire surgery was pin tract infection, which occurred in 5 cases (22.7%). There were no complications such as deep infections, vascular and nerve damage, failure of fixation, secondary fracture displacement, non-union of fracture, osteonecrosis of the humerus, joint stiffness, rotator cuff weakness and limb deformity.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The double-Schanz screw external fixator combined with anti-rotating Kirschner wire is a safe and effective treatment for displaced Salter\u2013Harris type II proximal humerus fractures in skeletally immature patients over the age of 10\u00a0years.\n<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s13018-022-03434-5","type":"journal-article","created":{"date-parts":[[2022,12,16]],"date-time":"2022-12-16T06:02:53Z","timestamp":1671170573000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Efficacy analysis of a double-Schanz screw external fixator combined with anti-rotating Kirschner wire in the treatment of proximal humerus fractures in skeletally immature patients"],"prefix":"10.1186","volume":"17","author":[{"given":"Qian","family":"Wang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huai","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingzhu","family":"Kong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingxin","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"jin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,12,16]]},"reference":[{"key":"3434_CR1","doi-asserted-by":"publisher","first-page":"249","DOI":"10.1097\/01241398-200405000-00002","volume":"24","author":"JC Lucas","year":"2004","unstructured":"Lucas JC, Mehlman CT, Laor T. 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