Sébastien Lalonde, MD, is a board-certified orthopaedic surgeon with expertise in treating simple and complex problems of the hand and upper extremity at the Missouri Orthopaedic Institute. He helps patients treat and manage conditions including arthritis pain and stiffness, ligament and tendon issues, deformities and tumors, nerve compression syndromes like carpal and cubital tunnel, and bone fractures or trauma in the forearm, wrist and hand.

The patient is at the center of Dr. Lalonde’s decision-making, and he takes into account their background, values and goals during assessment and treatment to help each patient achieve what success means to them.

Music is Dr. Lalonde’s passion outside of medicine, though he has moved from playing instruments to editing and mixing tracks. He enjoys cooking and baking, particularly his excellent Montreal bagels, and cheering on the Missouri Tigers with his wife and two sons.

Education & Training

Medical School

McGill University

Graduate Institution

Queens University


Family Medicine

  • Queens Universitiy-Ontario GME


Orthopaedic Surgery

  • Queens Universitiy-Ontario GME


Hand Surgery

  • University of Toronto

Hand and Upper Extremity Surgery

  • Queens Universitiy-Ontario GME


Royal College of Physicians & Surgeons Canada


MU Health Care participates with most major managed care organizations. To find out whether MU Health Care is a participating provider in your insurance plan or network, or for information on co-payments and deductibles, please contact your insurance carrier directly.

Academic Information

Assistant Professor of Orthopaedic Surgery


1 Hospital Drive
Columbia, MO 65212
United States

P. 573-884-9037
F. 573-884-1235

Research Profile

Sébastien Lalonde, MD, FAAOS, is an orthopaedic and microvascular surgeon with experience treating all forms of hand and upper extremity disorders, including arthritis, nerve compression syndromes, fractures, ligament and tendon issues, wrist arthroscopy, complex reconstruction and limb preservation. His research interests include improving outcomes in patients that undergo complex soft tissue reconstructions for limb preservation, and he has written a scoping review on the perioperative management of free flap surgery patients.

Research Interests

  • Improving patient outcomes after soft tissue reconstruction

Areas of Expertise

  • Hand and microvascular surgery
  • Limb preservation, soft tissue coverage including free flap surgery

Awards & Honors

  • Queen's University — 100th percentile score on final year Orthopedic in-training exam
  • McGill University — Mark Nickerson Prize of Pharmacology — 2008
  • McGill University — Samuel Rosenfeld Prize — 2008
  • McGill University — Shirley Nancy Endman Prize
  • McGill University — Dean's Honour
  • Graduation Award — 2007-2011
  • J.W. McConnell Scholarship — 2007


  • Lalonde S, Wood GC. Short stay total joint arthroplasty program: patient factors predicting readmission. Can J Surg. 2019. PMID: 30900435.
  • Wood G, Lalonde S, Walsh K, Harper K. Outcomes of Hip and Knee Total Joint Arthroplasty in a Canadian Inmate Population Over a 10-Year Period. Can J Surg. 2018;61(5):350-354.
  • Wood G, Lalonde S, Cudd S. Exploring patients' perceptions of their surgeon based on attire. J Anesthes Surg. 2017;4(1):1-5.
  • Lalonde S, Pichora D, Zakani S. Phenol embalming: A new model for the biomechanical study of flexor tendon repair. Bone Joint J. 2016;98-B (SUPP 21):45.
  • Lalonde S, Lau R, Wood G, Harper K. Outcomes of hip and knee total joint arthroplasty in the Kingston inmate population over a ten-year period. Bone Joint J. 2016;98-B(SUPP 20):23.
  • Paluzzi D, Lalonde S, Wood G. Wii Fit Age in older adults undergoing total hip arthroplasty: a preliminary study. MUMJ 2015;12:7-11.
  • Tessler O, Vorstenbosch J, Jones D, Lalonde S, Zadeh T. Heparin-induced thrombocytopenia and thrombosis as an under-diagnosed cause of flap failure in heparin-naive patient: A case report and systematic review of the literature. Microsurgery. 2014;34(2):157-163.
  • Chevalier S, Adegoke O, Lalonde S, Gougeon R, Morais JA, Marliss EB. Amino acids stimulate protein anabolism and attenuate fed-state glucose uptake in healthy young men. Can J Diabetes. 2009;33(3):226.