Canadian Spine SocietyLongitudinal changes in comprehensive radiographic parameters following short-segment surgery (1–2 levels) for degenerative lumbar spondylolisthesisMeasuring spinopelvic parameters in patients with 6 lumbar vertebrae: a matched

38.2% v. 13.4%), and the standing DLS-disc angle was greater in the decompression group (6.2° v. 5.0°, p = 0.012).Over time, mean slip percent did not change in the decompression group and improved in the fusion group from 25% to 16%.Lumbar lordosis increased from preoperative values at 3 months and remained higher through 5 years favouring fusion by 2.6° to 3.1° (p ≤ 0.016).Sagittal vertical axis improvement favoured fusion at 3 and 12 months (-13.1 mm and -15.00 mm, p ≤ 0.01) but was not significant at 2 or 5 years.Other parameters showed no significant changes over time or differential trajectories by surgery type.Conclusion: Short-segment fusion produced modest improvements in sagittal alignment compared to decompression alone, but the effect tended to nullify after 24 months.Both techniques maintained mean disc height and adjacent segment stability, as well as slip segment stability for the decompression group up to 5 years.

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Publication Details

Journal
Canadian Journal of Surgery
Published
2026-10-27
DOI
https://doi.org/10.1503/cjs.017726
Primary Topic
Spine and Intervertebral Disc Pathology
Type
article
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article

Canadian Spine SocietyLongitudinal changes in comprehensive radiographic parameters following short-segment surgery (1–2 levels) for degenerative lumbar spondylolisthesisMeasuring spinopelvic parameters in patients with 6 lumbar vertebrae: a matched

Chloe Cadieux, Robert G. Watkins, Sean Christie, Taryn Ludwig et al.
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Canadian Journal of Surgery
Spine and Intervertebral Disc Pathology
article

Canadian Spine SocietyLongitudinal changes in comprehensive radiographic parameters following short-segment surgery (1–2 levels) for degenerative lumbar spondylolisthesisMeasuring spinopelvic parameters in patients with 6 lumbar vertebrae: a matched

Chloe Cadieux, Robert G. Watkins, Sean Christie, Taryn Ludwig, Yoga Raja Rampersaud, Mohamad Bakhaidar, Christopher S. Lozano, Vanessa Giddins, Charlotte Dandurand, Kevin Clesham, Justin S. King, Mark Alexander MacLean, Vishwathsen Karthikeyan, Omar Siddiqi, Aazad Abbas, Karlo Miguel Pedro, Fernando Padilla-Lichtenberger, Renan Jose Rodrigues Fernandes, Jennifer R. Lischynski, Luke J. MacLean, Adeesya Gausper, Lindsay D. Orosz, Christopher J. Nielsen, Kevin M. Smit, Drew Mulhall, Nordan Flaaten, Vishal P. Varshney, Ganesh Swamy, Preston R. Jenkins, Daniel Lobos, Andrew Jack, Jennifer A. Dermott, László Kiss, Shaurya Gupta, Jason Silvestre, Sager Hanna, Pawel P. Jankowski, Shintaro Honda, Eva Yiguan Liu, Bhushan Diwakar Thombre, Abdulrahman Al-Naseem, Ragavan Manoharan, Newton José Godoy Pimenta, Chanelle Montpetit, Rayan Affes, Paolo Brigato, Michael Bond, Stephen J. Lewis, Geneviève Bélanger, Vivien Chan, J. Dufresne, Perrine Coquelet, Nicole Don, Sunny Chaudhary, Drew A. Bednar, Kirill Pustovetov, Hsuan Ming Su, Mouad Elganga, Navid Ghaderi, Daniel Nikitin, José Manuel García Moreno, Xavier Thibault, Mohammad Daher, Andy Hu, Jaskaran Singh, Vivian Huong Hoang Thien Le, Pascal Mputu Mputu, Yan G.M.D. Silva, Ariane LeBlanc Grant, Michael Mulcahy, Daniel Kurtz, Taha F. Chomelawala, Jeremy Bergeron, George X. Zhao, Anne Jinks
article en

Abstract

38.2% v. 13.4%), and the standing DLS-disc angle was greater in the decompression group (6.2° v. 5.0°, p = 0.012).Over time, mean slip percent did not change in the decompression group and improved in the fusion group from 25% to 16%.Lumbar lordosis increased from preoperative values at 3 months and remained higher through 5 years favouring fusion by 2.6° to 3.1° (p ≤ 0.016).Sagittal vertical axis improvement favoured fusion at 3 and 12 months (-13.1 mm and -15.00 mm, p ≤ 0.01) but was not significant at 2 or 5 years.Other parameters showed no significant changes over time or differential trajectories by surgery type.Conclusion: Short-segment fusion produced modest improvements in sagittal alignment compared to decompression alone, but the effect tended to nullify after 24 months.Both techniques maintained mean disc height and adjacent segment stability, as well as slip segment stability for the decompression group up to 5 years.

Canadian Journal of SurgeryVol. 69(5suppl1)
University of New Brunswick (CA), Western University (CA), Cedars-Sinai Medical Center (US), St. Michael's Hospital (CA), Dalhousie University (CA), Providence Health Care (CA), Hoag Memorial Hospital Presbyterian (US), University Health Network (CA), Université de Sherbrooke (CA), University of British Columbia (CA), Medical University of South Carolina (US), University of Ottawa (CA), University of Alberta (CA), Pontificia Universidad Católica de Chile (CL), University of Calgary (CA), University of Pittsburgh (US), Duke University (US), King Abdulaziz University (SA), University of Toronto (CA), Medical College of Wisconsin (US), Trinity College Dublin (IE), Children's Hospital of Eastern Ontario (CA), Toronto Western Hospital (CA), Royal North Shore Hospital (AU), London Health Sciences Centre (CA), Hospital for Sick Children (CA), Alberta Children's Hospital (CA), Centre Hospitalier Universitaire Sainte-Justine (CA), University of Saskatchewan (CA), National Center for Spinal Disorders (HU), University of Pittsburgh Medical Center (US), Hôpital du Sacré-Cœur de Montréal (CA), Centre Hospitalier de l’Université de Montréal (CA), Campus Bio Medico University Hospital (IT), Bone Health and Osteoporosis Foundation (US), BC Children's Hospital (CA), Krembil Research Institute (CA), Schroeder Arthritis Institute (CA), Krembil Brain Institute (CA), Centre intégré universitaire de santé et de services sociaux du Nord-de-l’Île-de-Montréal (CA), London Health Sciences Centre Research Institute (CA), Secretaria da Saúde do Estado da Bahia (BR), CHU Sainte-Justine Research Center (CA), UBC Centre for Health Services and Policy Research (CA), University College London (GB), University of Manitoba (CA), McGill University (CA), Toronto Metropolitan University (CA), Concordia University (CA), Université de Montréal (CA), UConn Health (US), McMaster University (CA)
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