School of Medicine
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Marc R. Safran, MD
Professor of Orthopaedic Surgery
Current Research and Scholarly InterestsDr. Safrans practice focuses on arthroscopic management of hip problems as well as articular cartilage regeneration, shoulder surgery and athletic shoulder and elbow problems. He is actively involved in research in these areas.
Aaron Keith Salyapongse
Clinical Associate Professor, Orthopaedic Surgery
BioDr. Salyapongse is a board-certified, fellowship-trained orthopaedic surgeon. He is the medical director of Interventional Services, medical director of Joint Replacement, and chief of Orthopaedics for Stanford Health Care Tri-Valley. He is also a clinical associate professor at Stanford University School of Medicine.
Dr. Salyapongse performs the full range of orthopaedic surgery procedures to treat injuries and conditions related to the hip and knee. He has extensive training and experience in the diagnosis and use of advanced treatment techniques for disorders of the hip and knee, including meniscus tears, arthritis, avascular necrosis, and post-traumatic injuries.
Dr. Salyapongse does hundreds of knee and hip replacements annually. His goal with each patient is to help them recover quickly and safely, with durable, long-lasting joint replacements as a result. He specializes in tissuesparing techniques, including an anterior approach to hip replacement.
Dr. Salyapongse is a certified instructor of anterior hip replacement. He has performed more than 2,000 procedures and traveled nationwide to teach it to other surgeons. Anterior hip replacement offers the potential for faster recovery, as it involves a small incision that presents less of a disruption to the muscles. Dr. Salyapongse also specializes in techniques such as Anterior PATH, or percutaneous assisted total hip replacements.
For knee replacements, Dr. Salyapongse uses a variety of techniques, including robotic surgery. He also specializes in partial knee replacements for patients who may be experiencing arthritis in a localized area but who might not be ready for a full replacement. Partial replacements enable patients to have a faster recovery and a more natural feeling knee post-surgery.
Dr. Salyapongse welcomes referrals from specialists as well as primary care physicians. He sees patients at every stage of their care journey, but especially when their situation has progressed beyond interim interventions like physical therapy or injections. He views each of his patients as an individual with a unique set of goals and tailors each treatment plan to fit their specific needs. While Dr. Salyapongse will help patients first explore the alternatives, he may recommend surgery once activities of daily living
(like sleep, work, or gait pattern) have been impacted.
In an effort to make outpatient care more accessible, Dr. Salyapongse has helped to pioneer the use of digital technology to prepare patients before, during, and after hip and knee surgery. His passion is to improve patient engagement and thus outcomes by letting patients know what they can expect at every stage of their care journey.
Dr. Salyapongse has co-authored articles on a variety of topics related to techniques, technologies, and outcomes in joint replacement surgery. His work has appeared in the American Journal of Orthopaedics, Journal of Arthroplasty, Current Sports Medicine Reports, and other publications.
He has made presentations on hip and knee replacement planning and surgery at meetings such as the American Association of Hip and Knee Surgeons, American Academy of Orthopaedic Surgeons, and Western Orthopaedic Association.
Dr. Salyapongse has won honors for his work, such as a Physician Champion Award for outstanding patient care. He is a member of the American Academy of Hip and Knee Surgeons and the American Academy of Orthopaedic Surgeons.
Chambers-Okamura Endowed Professor of Pediatric Orthopaedics
BioKevin G. Shea, MD is an orthopaedic surgeon at Stanford University Medical Center and the Lucile Packard Children’s Hospital. Dr. Shea grew up in Montana and California, graduated from the UCLA School of Medicine, and completed his orthopaedic residency at the University of Utah School of Medicine. His advanced training includes pediatric orthopaedics at Rady Children’s Hospital in San Diego, AO Fellowship in Bern Switzerland with Drs. Ganz (Hip), Dr. Diego Fernandez (Trauma), and Dr. Hans Staubli (sports), and Ilizarov Training in Lecco, Italy. He was the AOSSM Traveling Sports Medicine Fellow in 2008, and practiced in Boise, ID prior to joining the Stanford Faculty. Dr. Shea is a founding member of the PRiSM Society (Pediatric Research in Sports Medicine), the ROCK (Research in OsteoChondritis of the Knee) Multi-center Study Group, and the SCORE prospective cohort registry for pediatric sports arthroscopy outcomes, complications. He is a member of the AAOS (American Academy of Orthopaedic Surgeons), POSNA (Pediatric Orthopaedic Society of North America) and the AOSSM (American Orthopedic Society for Sports Medicine). In addition, Dr. Shea has authored more than 240 scientific papers and book chapters.
Seth Lawrence Sherman, MD
Associate Professor of Orthopaedic Surgery
Current Research and Scholarly InterestsMy research focuses on ways to augment tissue healing, improve human performance, and prevent musculoskeletal injuries. Approaching these challenges through parallel basic science and clinical pathways, our team works from the “bedside to the bench and back to the bedside”, identifying areas of clinical need to deliver evidence-based solutions for patients.
We collaborates with orthopaedic surgeons, non-surgical physicians, and researchers within bioengineering, human performance, and musculoskeletal imaging across the Stanford campus. The team is developing novel methods to accurately record human movement (including wearable technology, phone-based systems), rapid MRI imaging protocols, and exploring the use of biomarkers to track injury and recovery. This research builds on my earlier work, which utilized portable, inexpensive software for Microsoft Kinect to detect knee injury risk in youth athletes performing a drop vertical jump test. The team’s multifaceted goal is: 1) develop innovative methods to screen for injury risk (i.e. youth athlete non-contact ACL), 2) create targeted intervention programs to reduce risk, 3) enhance athletic performance; and 4) improve accuracy of return to play testing following injury/surgery (i.e. clinical evaluation, biomarkers, functional tests, imaging analysis for healing).
In the laboratory,our team investigates cellular and molecular deficiencies in tissue types including tendon, ligament, articular cartilage, and meniscus. By understanding aberrant pathways leading to tissue injury, they can identify innovative therapeutic targets for intervention. In collaboration with the Genetic Engineering and Synthetic Biology laboratories, Dr. Sherman’s research has explored the role of orthobiologic agents such as platelet rich plasma (PRP) and bone marrow aspirate concentrate (BMAC) for tissue healing in patella tendinopathy (the breakdown of collagen in a tendon). Our lab is also investigating the use of CBD for musculoskeletal applications as an alternative to commonly used local anesthetics and cortisone derivatives. In my earlier work, we researched the cellular toxicity of such applications.
In addition to basic science research, I have helped to build a Sports Medicine clinical research team that includes several full-time clinical research coordinators, residents, fellows, and students. The team collects prospective outcomes on their patients using a novel data collection platform called Patient IQ. The group is part of the JUPITER study which is the largest, multicenter study ever assembled in patellofemoral instability. They are additionally planning to enroll in FDA-approved clinical studies investigating pioneering strategies for knee cartilage restoration, joint preservation, and orthobiologic injections for osteoarthritis. Recent clinical publications explore outcomes in meniscus preservation and transplantation, medial patellofemoral ligament reconstruction, osteochondral allograft and matrix-induced autologous chondrocyte implantation (MACI), and surgical augmentation using PRP/BMAC. The clinical research team actively reports results of non-surgical and surgical interventions to continue to introduce new knowledge to the field, with the goal of improved patient outcome.