{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T04:58:41Z","timestamp":1785473921286,"version":"3.56.0"},"reference-count":24,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2025,5,22]],"date-time":"2025-05-22T00:00:00Z","timestamp":1747872000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>Ankylosing spondylitis (AS) often presents with spinal kyphosis, and pedicle subtraction osteotomy (PSO) is a common surgical technique for correcting AS\u2010related kyphosis. However, after PSO, the posterior column lacks rigid bone support, potentially leading to intervertebral disc mobility and loss of correction. This study aims to introduce a novel 3D\u2010printed laminae for the treatment of AS\u2010related kyphosis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This is a retrospective cohort study. A total of 48 patients receiving posterior correction surgeries between December 2021 and January 2022 were included and divided into two groups according to whether they accepted the 3D\u2010printed laminae. We propose a novel approach using 3D\u2010printed laminae to enhance posterior column stability and reduce deformity loss. Sixteen patients receiving 3D\u2010printed laminae and 32 patients who did not receive that device. We collected preoperative and postoperative radiographic parameters, perioperative data, and patient\u2010reported clinical scores. Statistical analysis involved independent sample <jats:italic>t<\/jats:italic> tests or randomization tests for continuous variables and chi\u2010square tests for categorical variables.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In the implanted group, kyphosis was corrected from 75.88\u00b0 preoperatively to 27.06\u00b0 postoperatively, and in the unimplanted group, from 70.98\u00b0 to 28.42\u00b0. At the last follow\u2010up, the \u0394GK (global kyphosis) was 1.76\u00b0 in the implanted group and 2.50\u00b0 in the unimplanted group. PJA was 9.77\u00b0 in the implanted group and 15.45\u00b0 in the unimplanted group, showing significant differences. Two patients in the unimplanted group experienced sagittal reconstruction failure. Health\u2010related quality of life (HRQoL) scores improved in the implanted group, with back pain scores of 2.63 and Oswestry Disability Index (ODI) scores of 13.50.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Our study introduces a novel 3D\u2010printed laminae technique for AS\u2010related kyphosis, aiding in maintaining sagittal balance. Patients reported improved subjective outcomes, including reduced pain and better HRQoL.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.70074","type":"journal-article","created":{"date-parts":[[2025,5,23]],"date-time":"2025-05-23T05:14:38Z","timestamp":1747977278000},"page":"2038-2047","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["<scp>3D<\/scp>\u2010Printed Laminae for Kyphosis in Ankylosing Spondylitis During Pedicle Subtraction Osteotomy"],"prefix":"10.1111","volume":"17","author":[{"given":"Yilin","family":"Lu","sequence":"first","affiliation":[{"name":"Department of Orthopaedics Peking University Third Hospital  Beijing China"},{"name":"Engineering Research Center of Bone and Joint Precision Medicine  Beijing China"},{"name":"Beijing Key Laboratory of Spinal Disease Research  Beijing 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0046-4844","authenticated-orcid":false,"given":"Miao","family":"Yu","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Peking University Third Hospital  Beijing China"},{"name":"Engineering Research Center of Bone and Joint Precision Medicine  Beijing China"},{"name":"Beijing Key Laboratory of Spinal Disease Research  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Peking University First Hospital  Beijing 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