Henry Ahn




Dr. Henry Ahn is an orthopaedic surgeon and Associate Scientist in the Li Ka Shing Knowledge Institute at St. Michael’s Hospital.  He has a PhD in Clinical Epidemiology from the Institute of Health Policy, Management and Evaluation (IHPME) at the University of Toronto. His clinical practice is focused on the management of polytrauma patients with significant orthopaedic injuries, spinal cord injuries, along with complex adult spinal disorders. Dr. Ahn is a member of the University of Toronto Spine Program and is a Principal Investigator with the Rick Hansen Registry.  He has a research interest in the management of spinal cord injury and the epidemiology of spinal cord injury incorporating large databases, prospective cohort studies, along with randomized control trials.

Recent Publications

  1. Iorio-Morin, C, Fisher, CG, Abraham, E, Nataraj, A, Attabib, N, Paquet, J et al.. Low-back pain after lumbar discectomy for disc herniation: what can you tell your patient?. J Neurosurg Spine. 2021; :1-7. doi: 10.3171/2021.2.SPINE201625. PubMed PMID:34450579 .
  2. Inculet, C, Urquhart, JC, Rasoulinejad, P, Hall, H, Fisher, C, Attabib, N et al.. Factors associated with using an interbody fusion device for low-grade lumbar degenerative versus isthmic spondylolisthesis: a retrospective cohort study. J Neurosurg Spine. 2021; :1-9. doi: 10.3171/2020.11.SPINE201261. PubMed PMID:34214985 .
  3. Glennie, RA, Canizares, M, Perruccio, AV, Abraham, E, Nicholls, F, Nataraj, A et al.. The impact of pathoanatomical diagnosis on elective spine surgery patient expectations: a Canadian Spine Outcomes and Research Network study. J Neurosurg Spine. 2021; :1-8. doi: 10.3171/2020.11.SPINE201490. PubMed PMID:34020418 .
  4. Slobogean, GP, Sprague, S, Bzovsky, S, Scott, T, Thabane, L, Heels-Ansdell, D et al.. Fixation using Alternative Implants for the Treatment of Hip Fractures (FAITH-2): The Exploratory Health-Related Quality of Life and Patient-Reported Functional Outcomes of a Multi-Centre 2 × 2 Factorial Randomized Controlled Pilot Trial in Young Femoral Neck Fracture Patients. Injury. 2021; :. doi: 10.1016/j.injury.2021.02.030. PubMed PMID:33618847 .
  5. Fehlings, MG, Badhiwala, JH, Ahn, H, Farhadi, HF, Shaffrey, CI, Nassr, A et al.. Safety and efficacy of riluzole in patients undergoing decompressive surgery for degenerative cervical myelopathy (CSM-Protect): a multicentre, double-blind, placebo-controlled, randomised, phase 3 trial. Lancet Neurol. 2021;20 (2):98-106. doi: 10.1016/S1474-4422(20)30407-5. PubMed PMID:33357512 .
  6. Würdemann, FS, Poolman, RW, Krijnen, P, Bzovsky, S, Sprague, S, Kaptein, BL et al.. Clockwise Torque of Sliding Hip Screws: Is There a Right Side?. J Orthop Trauma. 2020;34 Suppl 3 :S76-S80. doi: 10.1097/BOT.0000000000001934. PubMed PMID:33027170 .
  7. MacDonald, DRW, Neilly, D, Schneider, PS, Bzovsky, S, Sprague, S, Axelrod, D et al.. Venous Thromboembolism in Hip Fracture Patients: A Subanalysis of the FAITH and HEALTH Trials. J Orthop Trauma. 2020;34 Suppl 3 :S70-S75. doi: 10.1097/BOT.0000000000001939. PubMed PMID:33027169 .
  8. DeAngelis, RD, Minutillo, GT, Stein, MK, Schemitsch, EH, Bzovsky, S, Sprague, S et al.. Who Did the Arthroplasty? Hip Fracture Surgery Reoperation Rates are Not Affected by Type of Training-An Analysis of the HEALTH Database. J Orthop Trauma. 2020;34 Suppl 3 :S64-S69. doi: 10.1097/BOT.0000000000001931. PubMed PMID:33027168 .
  9. Noori, A, Sprague, S, Bzovsky, S, Schemitsch, EH, Poolman, RW, Frihagen, F et al.. Predictors of Long-Term Pain After Hip Arthroplasty in Patients With Femoral Neck Fractures: A Cohort Study. J Orthop Trauma. 2020;34 Suppl 3 :S55-S63. doi: 10.1097/BOT.0000000000001929. PubMed PMID:33027167 .
  10. Blankstein, M, Schemitsch, EH, Bzovsky, S, Poolman, RW, Frihagen, F, Axelrod, D et al.. What Factors Increase Revision Surgery Risk When Treating Displaced Femoral Neck Fractures With Arthroplasty: A Secondary Analysis of the HEALTH Trial. J Orthop Trauma. 2020;34 Suppl 3 :S49-S54. doi: 10.1097/BOT.0000000000001936. PubMed PMID:33027166 .
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Affiliations & Other Activities

  • Assistant Professor, Division of Orthopaedic Surgery, University of Toronto
  • Assistant Professor, University of Toronto Spine Program, University of Toronto