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Henry Ahn

MD, FRCSC, PhD

Investigator

Email: Henry.Ahn@unityhealth.to
Tel: 416-864-6005

Research Programs

Biography

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. Lefaivre, KA, Slobogean, G, O'Hara, NN, O'Brien, PJ, Canadian Orthopaedic Trauma Society (COTS) Investigators. Far Cortical Locking Versus Standard Constructs for Locked Plate Fixation in the Treatment of Acute, Displaced Fractures of the Distal Femur: A Multicenter Randomized Trial. J Bone Joint Surg Am. 2024;106 (19):1739-1749. doi: 10.2106/JBJS.23.01390. PubMed PMID:39853223 .
  2. Dionne, A, Al-Zakri, M, Labelle, H, Joncas, J, Parent, S, Mac-Thiong, JM et al.. Canadian Spine Society: 24th Annual Scientific Conference, Wednesday, February 28 - Saturday, March 2, Fairmont Chateau Whistler, Whistler, B.C., Canada. Can J Surg. 2024;67 (6suppl1):S17-S76. doi: 10.1503/cjs.011424. PubMed PMID:39537311 PubMed Central PMC11573431.
  3. Hébert, JJ, Bigney, EE, Nowell, S, Wang, S, Wedderkopp, N, Small, C et al.. Outcome prediction following lumbar disc surgery: a longitudinal study of outcome trajectories, prognostic factors, and risk models. J Neurosurg Spine. 2025;42 (1):33-42. doi: 10.3171/2024.6.SPINE24430. PubMed PMID:39366025 .
  4. Bond, M, Charest-Morin, R, Street, J, Fisher, C, Dea, N, Singh, S et al.. The Influence of Wait Time on Surgical Outcomes in Elective Lumbar Degenerative Spine Conditions: A Retrospective Multicentre Cohort Study. Global Spine J. 2024; :21925682241287463. doi: 10.1177/21925682241287463. PubMed PMID:39322408 PubMed Central PMC11559814.
  5. Guerra-Farfan, E, Borges, FK, Bhandari, M, Garcia-Sanchez, Y, Nuñez, JH, Mestre-Torres, J et al.. Mortality, perioperative complications and surgical timelines in hip fracture patients: Comparison of the Spanish with the non-Spanish Cohort of the HIP ATTACK-1 trial. Injury. 2024;55 (11):111827. doi: 10.1016/j.injury.2024.111827. PubMed PMID:39217648 .
  6. Fehlings, MG, Pedro, KM, Alvi, MA, Badhiwala, JH, Ahn, H, Farhadi, HF et al.. Riluzole for Degenerative Cervical Myelopathy: A Secondary Analysis of the CSM-PROTECT Trial. JAMA Netw Open. 2024;7 (6):e2415643. doi: 10.1001/jamanetworkopen.2024.15643. PubMed PMID:38904964 PubMed Central PMC11193126.
  7. Bak, AB, Moghaddamjou, A, Alvi, M, Ahn, H, Farhadi, HF, Shaffrey, CI et al.. Postoperative C5 Palsy after Anterior or Posterior Decompression for Degenerative Cervical Myelopathy: A Subgroup Analysis of the Multicenter, Prospective, Randomized, Phase III, CSM-Protect Clinical Trial. Spine (Phila Pa 1976). 2024;49 (20):1410-1416. doi: 10.1097/BRS.0000000000005007. PubMed PMID:38616732 .
  8. Nguyen, J, Wang, L, Lei, W, Hu, Y, Gulati, N, Chavez-Madero, C et al.. Culture substrate stiffness impacts human myoblast contractility-dependent proliferation and nuclear envelope wrinkling. J Cell Sci. 2024;137 (6):. doi: 10.1242/jcs.261666. PubMed PMID:38345101 PubMed Central PMC11033523.
  9. Abbas, A, Olotu, O, Bhatia, A, Selimovic, D, Tajik, A, Larouche, J et al.. Machine learning models can predict subsequent publication of North American Spine Society (NASS) annual general meeting abstracts. PLoS One. 2023;18 (8):e0289931. doi: 10.1371/journal.pone.0289931. PubMed PMID:37607198 PubMed Central PMC10443859.
  10. Bonello, JP, Koucheki, R, Abbas, A, Lex, J, Nucci, N, Yee, A et al.. Comparison of major spine navigation platforms based on key performance metrics: a meta-analysis of 16,040 screws. Eur Spine J. 2023;32 (9):2937-2948. doi: 10.1007/s00586-023-07865-4. PubMed PMID:37474627 .
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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