{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T15:56:31Z","timestamp":1778687791596,"version":"3.51.4"},"reference-count":29,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2012,12,1]],"date-time":"2012-12-01T00:00:00Z","timestamp":1354320000000},"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":["Global Spine Journal"],"published-print":{"date-parts":[[2012,12]]},"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Studies document rod fracture in pedicle subtraction osteotomy (PSO) settings where disk spaces were preserved above or adjacent to the PSO. This study compares the multidirectional bending rigidity and fatigue life of PSO segments with or without interbody support.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Twelve specimens received bilateral T12\u2013S1 posterior fixation and L3 PSO. Six received extreme lateral interbody fusion (XLIF) cages in addition to PSO at L2\u2013L3 and L3\u2013L4; six had PSO only. Flexion-extension, lateral bending, and axial rotation (AR) tests were conducted up to 7.5 Newton-meters (Nm) for groups: (1) posterior fixation, (2) L3 PSO, (3) addition of cages (six specimens). Relative motion across the osteotomy (L2\u2013L4) and entire fixation site (T12\u2013S1) was measured. All specimens were then fatigue tested for 35K cycles.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Regardingmultiaxial bending, there was a significant 25.7% reduction in AR range of motion across L2\u2013L4 following addition of cages. Regarding fatigue bending, dynamic stiffness, though not significant ( p\u2009=\u20090.095), was 22.2% greater in the PSO\u2009+\u2009XLIF group than in the PSO-only group.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Results suggest that placement of interbody cages in PSO settings has a potential stabilizing effect, which is modestly evident in the acute setting. Inserting cages in a second-stage surgery remains a viable option and may benefit patients in terms of recovery but additional clinical studies are necessary to confirm this.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1055\/s-0032-1331460","type":"journal-article","created":{"date-parts":[[2012,12,6]],"date-time":"2012-12-06T18:40:50Z","timestamp":1354819250000},"page":"213-220","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":38,"title":["Construct Rigidity after Fatigue Loading in Pedicle Subtraction Osteotomy with or without Adjacent Interbody Structural Cages"],"prefix":"10.1177","volume":"2","author":[{"given":"Vedat","family":"Deviren","sequence":"first","affiliation":[{"name":"Biomechanical Testing Facility, San Francisco General Hospital, San Francisco, California"},{"name":"Department of Orthopaedic Surgery, University of California, San Francisco, California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jessica A.","family":"Tang","sequence":"additional","affiliation":[{"name":"Biomechanical Testing Facility, San Francisco General Hospital, San Francisco, California"},{"name":"Department of Orthopaedic Surgery, University of California, San Francisco, California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Justin K.","family":"Scheer","sequence":"additional","affiliation":[{"name":"Biomechanical Testing Facility, San Francisco General Hospital, San Francisco, California"},{"name":"Department of Orthopaedic Surgery, University of California, San Francisco, California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jenni M.","family":"Buckley","sequence":"additional","affiliation":[{"name":"Biomechanical Testing Facility, San Francisco General Hospital, San Francisco, California"},{"name":"Department of Orthopaedic Surgery, University of California, San Francisco, California"},{"name":"Department of Neurological Surgery, University of California, San Francisco, California"},{"name":"San Francisco Orthopaedic Residency Program, St. Mary's Medical Center, San Francisco, California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Murat","family":"Pekmezci","sequence":"additional","affiliation":[{"name":"Biomechanical Testing Facility, San Francisco General Hospital, San Francisco, California"},{"name":"Department of Orthopaedic Surgery, University of California, San Francisco, California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R. 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