{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T21:15:46Z","timestamp":1777929346242,"version":"3.51.4"},"reference-count":27,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"name":"Changsha Central Hospital","award":["YNKY202511"],"award-info":[{"award-number":["YNKY202511"]}]},{"name":"Changsha Science and Technology Fund Project","award":["kq2014023"],"award-info":[{"award-number":["kq2014023"]}]},{"name":"Changsha Science and Technology Fund Project","award":["kzd21081"],"award-info":[{"award-number":["kzd21081"]}]},{"name":"Hunan Province Health Commission Research Program","award":["D202304076350"],"award-info":[{"award-number":["D202304076350"]}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Orthop Surg (Hong Kong)"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To evaluate the feasibility of applying balloon dilation technique in the eggshell procedure via pedicle subtraction osteostomy (PSO) for thoracolumbar kyphosis secondary to ankylosing spondylitis (AS).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Prospective randomized controlled study. A total of 35 AS patients with thoracolumbar kyphosis admitted to the Department of Spinal Surgery, Changsha Central Hospital from October 2021 to October 2023 were enrolled and divided into two groups: the balloon group (\n                      <jats:italic toggle=\"yes\">n<\/jats:italic>\n                      = 16) and the non-balloon group (\n                      <jats:italic toggle=\"yes\">n<\/jats:italic>\n                      = 19). Both groups underwent spinal wedge osteotomy combined with pedicle screw fixation. The balloon group utilized balloon dilation to remove cancellous bone, while the non-balloon group employed the conventional eggshell technique. Surgical duration, intraoperative blood loss, complications, hospital stay, postoperative functional recovery, and degree of spinal deformity correction were assessed and compared.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Significant differences were observed between the two groups in surgical duration, intraoperative blood loss, and hospital stay (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      &lt; 0.001). No complications such as poor wound healing or surgical site infection occurred in either group. All 35 patients were followed up for an average of 18.5\u00a0months. Both groups showed significant improvements in VAS and ODI scores at 1\u00a0week postoperatively and final follow-up compared to preoperative values (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      &lt; 0.05), with statistically significant differences between the two groups at 1\u00a0week postoperatively (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      &lt; 0.05). Radiographic parameters (TLK, LL, SVA, PT) significantly improved in both groups at 1 week postoperatively and final follow-up (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      &lt; 0.05), except for TK, which showed no significant change (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      &gt; 0.05). No significant differences were found in radiographic parameters between the two groups at 1 week postoperatively or final follow-up (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      &gt; 0.05).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The application of balloon dilation technique in PSO eggshell procedures offers advantages such as reduced intraoperative blood loss, shorter surgical duration, and enhanced safety. It represents a valuable surgical technique worthy of promotion in the correction of thoracolumbar kyphosis secondary to AS.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10225536261439409","type":"journal-article","created":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T21:55:46Z","timestamp":1774562146000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Balloon-assisted eggshell procedure via pedicle subtraction osteotomy for thoracolumbar kyphosis in ankylosing spondylitis: A randomized controlled trial"],"prefix":"10.1177","volume":"34","author":[{"given":"Jinhui","family":"Bu","sequence":"first","affiliation":[{"name":"Changsha Central Hospital Affiliated to University of South China"},{"name":"Affiliated Xuzhou Clinical College of Xuzhou Medical University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Youzhi","family":"He","sequence":"additional","affiliation":[{"name":"Changsha Central Hospital Affiliated to University of South China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Yang","sequence":"additional","affiliation":[{"name":"Changsha Central Hospital Affiliated to University of South China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yongfu","family":"Wang","sequence":"additional","affiliation":[{"name":"Changsha Central Hospital Affiliated to University of South China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"JieWei","family":"Song","sequence":"additional","affiliation":[{"name":"Changsha Central Hospital Affiliated to University of South China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-1355-0270","authenticated-orcid":false,"given":"YuXia","family":"Xu","sequence":"additional","affiliation":[{"name":"Changsha Central Hospital Affiliated to University of South China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2026,3,26]]},"reference":[{"key":"e_1_3_7_2_2","doi-asserted-by":"publisher","DOI":"10.1007\/s10067-017-3660-3"},{"key":"e_1_3_7_3_2","doi-asserted-by":"publisher","DOI":"10.1148\/119.2.293"},{"key":"e_1_3_7_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.iac.2022.10.001"},{"key":"e_1_3_7_5_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-198504000-00019"},{"key":"e_1_3_7_6_2","first-page":"221","volume-title":"Segmental Spinal Instrumentation","author":"Heinig CF","year":"1984","unstructured":"Heinig CF. Eggshell procedure. In: Luque ER (ed). Segmental Spinal Instrumentation. : Slack, 1984, pp. 221\u2013223."},{"key":"e_1_3_7_7_2","first-page":"100516","article-title":"Lumbar pedicle subtraction osteotomy: techniques and outcomes","volume":"19","author":"Bourghli A","year":"2024","unstructured":"Bourghli A, Boissiere L, Obeid I. Lumbar pedicle subtraction osteotomy: techniques and outcomes. 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The impact of ossified anterior longitudinal ligaments surrounding osteotomy vertebra on the lordosing capability of pedicle subtraction osteotomy in thoracolumbar kyphotic deformity secondary to ankylosing spondylitis. 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