Scientific Advisory Board of Physicians

The Alphatec Spine Scientific Advisory Board of Physicians is a premier board of distinguished physicians that provides strategic clinical guidence to our management.

Stephen H. Hochschuler, M.D. (Chairman)

Dr. Hochschuler is a board certified orthopedic surgeon with outstanding credentials and expertise in the treatment of the spine. Co-Founder of the Texas Back Institute and a Founding Member of the Board of Directors of the Spine Arthroplasty Society, Dr. Hochschuler has been published in a number of prestigious international spine journals, as well as authoring two books for the lay reader, Back in Shape and Treat Your Back Without Surgery. A graduate of Columbia University in New York, Dr. Hochschuler received a medical degree from Harvard Medical School. He completed an internship and general residency at Harvard Surgical Service, Boston City Hospital, Boston, Massachusetts, and an orthopedic surgery residency at the University of Texas Southwestern Medical School and Parkland Memorial Hospital, both in Dallas, Texas.

Bret B. Abshire, M.D.

Dr. Abshire is a member of the neurosurgical faculty at the University of California, San Diego serving as Assistant Clinical Professor of Surgery. He is Vice Chair of the Surgery Department at the Southwest Healthcare System in Southern California. In addition, he maintains a private, general neurological practice performing surgery for brain tumors and cerebrovascular disease. Dr. Abshire's area of special expertise includes disorders of the cervical, thoracic, and lumbar spine, and he is skilled in complex re-operative spine surgeries with spinal instrumentation. He has participated in several clinical studies involving the treatment of spinal disorders and has had a number of papers published in scientific journals. Dr. Abshire received a medical degree from the University of Health Sciences at The Chicago Medical School. He completed a surgical internship and neurosurgery residency at The Cleveland Clinic Foundation and a spine fellowship at the University of South Florida/Tampa General Hospital. Dr. Abshire is a member of the American Association of Neurological Surgeons.

Frank P. Cammisa, Jr., M.D.

Frank P. Cammisa, Jr., M.D. is the Chief of the Spine Service at Hospital for Special Surgery and Associate Professor of Orthopaedic Surgery at Weill Medical College of Cornell University located in New York, NY. In addition, he is an Associate Scientist in the Research Division at the Hospital for Special Surgery. Dr. Cammisa received his medical degree from College of Physicians and Surgeons at Columbia University and completed his surgical residency at The Presbyterian Hospital and Columbia Presbyterian Medical Center, New York, NY. He completed an orthopaedic surgical residency at The Hospital for Special Surgery, New York, NY. Further, Dr. Cammisa completed a fellowship in spine surgery at the University of Miami, Jackson-Memorial Medical Center and The Miami Project to Cure Paralysis in Miami, Florida. Dr. Cammisa has published more than 80 articles in peer-reviewed journals and has led several research studies. He is also a member of numerous organizations including the Scoliosis Research Society, the International Society for the Study of the Lumbar Spine, the North American Spine Society, the American Academy of Orthopedic Surgery, the American Orthopaedic Association, and the Cervical Spine Research Society.

Gregory Carlson, M.D.

Dr. Carlson is a board certified orthopaedic surgeon with subspecialty training in Spine Surgery. He is a general partner of Orthopaedic Specialty Institute of Orange County where his clinical practice is devoted to the treatment of spinal disorders. Dr. Carlson is also a Clinical Assistant Professor of Orthopaedics at the University of California, Irvine. Dr. Carlson completed his Bachelor of Arts in biology at Southern University in Tennessee. He attended medical school at Loma Linda University graduating with Alpha Omega Alpha Honors. Dr. Carlson has published numerous scientific articles on both basic science and clinical topics, and lectured extensively on spinal reconstructive topics. He continues to teach residents and orthopaedic surgeons locally and abroad. He is a member of the American Academy of Orthopaedic Surgeons, the North American Spine Society, the Cervical Spine Research Society, and the American Spinal Injury Association.

Antonio E. Castellvi, M.D.

Dr. Castellvi is an experienced Physician, with over thirty years of surgical experience, specializing in cervical, lumbar, and thorocolumbar procedures, degenerative disease and deformity, scoliosis, reconstruction, spinal cord injury, minimally invasive techniques and motion preservation. Nationally and internationally recognized as an expert, Dr. Castellvi actively participates in several research studies of the spine. He is a published author, and has presented extensively on multiple spine subjects and research findings. He has excellent communication and cross-cultural skills, speaking two languages fluently.

Gary Dix, M.D.

Gary Dix is a Neurosurgeon with the Maryland Brain & Spine LLC and is currently the Medical Director of Spine Services, Anne Arundel Medical Center and Chief, Division of Neurosurgery and Director of Spine Program, Doctors’ Community Hospital. He has extensive experience with complex spine and brain disorders, incorporating the use of the latest minimally invasive procedures, as well as stereotactic radiosurgery to non-invasively treat conditions of the brain and spine. Dr. Dix was born and raised in South Africa where he received his medical degree from the University of Stellenbosch. In 1993, Dr. Dix entered the neurosurgery residency program at the University of Calgary, Canada and then completed a spine surgery fellowship at Foothills Hospital in Calgary, where he served as staff neurosurgeon for two years. He passed the certifying boards in neurosurgery (2006).

Frank J. Eismont, M.D.

Dr. Eismont has been affiliated with the Miller School of Medicine at the University of Miami since 1980. He is currently the Leonard M. Miller Professor and Chairman of the Department of Orthopedic Surgery. He is also the Program Director for the orthopedic residency training program as well as the spine surgery fellowship training program. Dr. Eismont has co-authored over 110 research articles and has served 10 years as a Director of the American Board of Orthopedic Surgery. A graduate of the University of Rochester School of Medicine in New York, Dr. Eismont completed internship and orthopedic residency training at Case-Western Reserve University in Cleveland and completed a spine fellowship at Case-Western University in Cleveland as well as a spine fellowship at Pennsylvania Hospital in Philadelphia. He is also an active member of numerous organizations including the Scoliosis Research Society, the International Society for the Study of the Lumbar Spine, the North American Spine Society, the American Academy of Orthopedic Surgery, the American Orthopaedic Association, and the Cervical Spine Research Society of which he is a past President.

J. Patrick Johnson, M.D.

Dr. Johnson practices and is a Director at Cedars-Sinai Institute for Spinal Disorders and Co-Director at the Cedars-Sinai Hyperhidrosis Center in Los Angeles, California. He served as Co-Director of the UCLA Comprehensive Spine Center for 10 years prior to his current position. Dr. Johnson's research activities include minimally invasive and endoscopic spinal surgery, stem cell research for regeneration of spinal disorders, spinal biomechanics, and spinal implant technology design. He is an active member of many neurological organizations, academic committees and editorial review boards. He has lectured widely and published in numerous peer-reviewed journals and books. Dr. Johnson received a medical degree from Oregon Health Sciences University. He completed a surgical internship and neurosurgical residency at the University of California, Los Angeles and a neurology/neurosurgical fellowship at the National Hospital for Nervous Diseases at Queen Square in London, England. He completed a second fellowship in spinal surgery at the University of Tennessee in Memphis, Tennessee.

Carl Lauryssen, M.D.

Carl Lauryssen is certified by the American and Canadian Board of Neurological Surgery. Dr. Lauryssen received his medical school training at the University of Cape Town, South Africa, followed by his neurosurgical residency at University of Calgary, Alberta, in Canada. He then completed a spinal neurosurgical surgery fellowship at the University of Alabama, under Dr. Mark Hadley, past president of the Congress of Neurological Surgeons. Dr. Lauryssen was on faculty, at Washington University for 7 years, directed the advanced neurosurgical spine program at Barnes-Jewish Hospital and his work at the University of Washington was recognized by both Orthopedic Surgery and Trauma Services. He has twice been awarded the Young Investigator Award from the American Association of Neurological Surgeons for his work on cervical disorders, and stem cell research. In addition, Dr. Lauryssen, was the first neurosurgeon to inject stem cells into a human spinal cord, as part of a FDA trial. As a leading spinal neurosurgeon, he is the co-director of spine research and development at Olympia Medical Center. His research, and surgical interests have focused on minimally invasive surgery and motion preservation. He shares his expertise and vision by writing medical publications, giving presentations and developing surgical devices to improve surgical outcome. He has a number of patents and inventions that are used in spinal surgery throughout the world.

James J. Yue, M.D.

Dr. Yue is an Associate Professor of Orthopedics and Rehabilitation at the Yale University School of Medicine, Co-Director of the Yale Spine Center, and Director of the Combined Yale Spine Fellowship. Dr. Yue has focused his recent clinical and basic science research in the area of non-fusion spinal technology. He has authored numerous peer-reviewed articles and book chapters examining the use of total disc arthroplasty in the lumbar and cervical spine. He is also the lead editor for the landmark text, Motion Preservation Surgery of the Spine: Advanced Techniques and Controversies. After completing an internship and residency in orthopedic surgery at Case Western Reserve University Hospitals in Cleveland, he completed a trauma and spine fellowship at the University of Maryland/RA Cowley Shock Trauma Hospital and an additional spine fellowship at Queen's Medical Centre in Nottingham and London, England.