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Dr. Ayeni is a Professor and Academic Division Head of Orthopaedic Surgery at McMaster University, Canada. He is also the Second President-Elect of the Canadian Orthopaedic Association, an Adjunct Professor in the Department of Health Research Methodology, Evidence and Impact; Chief of Adult Surgery at McMaster University Medical Centre; Director of the McMaster Arthroscopy Collective Sports Medicine (MACSports) fellowship; and Medical Director for the Hamilton Tiger Cats (Canadian Football League) and Forge FC (Canadian Premier League).

Recently, Dr. Ayeni has been named a Tier 2 Canada Research Chair in Joint Preservation Surgery (2022-2027) and a University Scholar (2022-2026) at McMaster University. He has published over 380 academic publications in sports medicine as well as several textbooks focus on sports medicine/research. Dr. Ayeni is the Deputy Chair for the International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine Scientific Committee (2019), the first non-European appointed to the European Society for Sports Traumatology, Knee Surgery and Arthroscopy Hip Arthroscopy Committee (2020), and is currently Research and Academy Chair of the International Society for Hip Arthroscopy (2021). 

He is considered a leading authority on orthopaedic sports injuries, in particular, hip injuries in the young adult, as this is a substantial portion of his clinical practice. He has spoken widely across the globe on evidence-based approaches to evaluate and treat hip-related syndromes and conditions.

Professional Organizations

  • The Royal College of Physicians and Surgeons of Canada
  • The Canadian Orthopaedic Association
  • Canadian Academy of Sports Medicine
  • Arthroscopy Association of North America
  • American Orthopaedic Society for Sports Medicine
  • American Academy of Orthopaedic Surgeons

Featured Publications

  • Ayeni OR, Chahal M, Tran MN, Sprague S. Pivot shift as an outcome measure for ACL reconstruction: a systematic review. Knee Surg Sports Traumatol Arthrosc. 2012 Jan 5.
  • ISAKOS Scientific Committee, Audigé L, Ayeni OR, Bhandari M, Boyle BW, Briggs KK, Chan K, Chaney-Barclay K, Do HT, Ferretti M, Fu FH, Goldhahn J, Goldhahn S, Hidaka C, Hoang-Kim A, Karlsson J, Krych AJ, LaPrade RF, Levy BA, Lubowitz JH, Lyman S, Ma Y, Marx RG, Mohtadi N, Marcheggiani Muccioli GM, Nakamura N, Nguyen J, Poehling GG, Roberts LE, Rosenberg N, Shea KP, Sohani ZN, Soudry M, Voineskos S, Zaffagnini S; International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine. A practical guide to research: design, execution, and publication. Arthroscopy. 2011 Apr;27(4 Suppl):S1-112.
  • Ayeni OR, Bedi A, Lorich DG, Kelly BT. Femoral neck fracture after arthroscopic management of femoroacetabular impingement: a case report. J Bone Joint Surg Am. 2011 May 4;93(9):e47.
  • Marx RG, Grimm P, Lillemoe KA, Robertson CM, Ayeni OR, Lyman S, Bogner EA, Pavlov H. Reliability of lower extremity alignment measurement using radiographs and PACS. Knee Surg Sports Traumatol Arthrosc. 2011 Oct;19(10):1693-8.
  • Ayeni OR, Busse JW, Bhandari M. Using extracorporeal shock-wave therapy for healing long-bone nonunions. Clin J Sport Med. 2011 Jan;21(1):74-5.
  • Musahl V, Ayeni OR, Citak M, Irrgang JJ, Pearle AD, Wickiewicz TL. The influence of bony morphology on the magnitude of the pivot shift. Knee Surg Sports Traumatol Arthrosc. 2010 Sep;18(9):1232-8..
  • Bhandari M, Busse JW, Hanson BP, Leece P, Ayeni OR, Schemitsch EH. Psychological distress and quality of life after orthopedic trauma: an observational study. Can J Surg. 2008 Feb;51(1):15-22.
  • Bhandari M, Sprague S, Ayeni OR, Hanson BP, Moro JK. A prospective cost analysis following operative treatment of unstable ankle fractures: 30 patients followed for 1 year. Acta Orthop Scand. 2004 Feb;75(1):100-5.
  • Hampson LG, Fried GM, Stets J, Ayeni OR, Bourdon-Conochie F. Common bile duct exploration: indications and results. Can J Surg. 1981 Sep;24(5):455-7.
  • Chiu RC, Ayeni OR, Stets J, Blundell PE, Mulder DS, Scott HJ. Iatrogenic false aneurysms. Can J Surg. 1981 Mar;24(2):160-2.
  • Fried GM, Ayeni OR, Brown RA, Lough J. Recurrent obstipation as a complication of partial pancreatectomy for non-beta cell adenoma of the pancreas. Can J Surg. 1979 Jul;22(4):354-5.


  • B.A., University of Western Ontario
  • M.D., University of Ottawa
  • F.R.C.S.(C)
  • Sports Medicine and Knee Surgery Fellowship, Carleton Sports Medicine Clinic, University of Ottawa
  • Sports Medicine and Shoulder Surgery Fellowship, Hospital for Special Surgery (USA)
  • Hip Preservation and Arthroscopy Fellowship, Schulthess Clinic (Dr Michael Leunig) & Orthopaedic Surgery Munich (Dr Michael Dienst)

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