Meet Our Team

The Total Joint Center is proud to have some of the most well-respected and skilled physicians in the field of orthopedics. The physicians and staff not only work to give the best care, but also the the best possible recovery.
Program Director, Total Joint Center

John A. Froehlich, MD is the program director of the Total Joint Center at The Miriam Hospital. He is a specialist in the areas of adult reconstructive surgery and sports medicine, and he operates on patients of all ages suffering from a variety of shoulder, hip and knee ailments. Many of these procedures are done arthroscopically, which often means less pain, shorter rehabilitation and a quicker return to work. 

Included among the reconstructive procedures are: shoulder surgeries for rotator cuff disease, instability and impingement; knee surgeries for tissue repair; corrective procedures for arthritis, including joint replacement; and hip surgery including hip replacements. He is also involved in research on improving cartilage properties and the quality of joint replacements. 

Froehlich is a member of the American Academy of Orthopaedic Surgeons, American College of Surgeons and the American Board of Orthopaedic Surgeons. He is also a clinical assistant professor of orthopaedics at The Warren Alpert Medical School of Brown University. He is on staff at both Rhode Island Hospital and The Miriam Hospital.

Medical Director of Rehabilitation, Miriam Hospital

Roy Aaron, MD is professor of orthopedics and professor of molecular pharmacology, physiology and biotechnology at Brown University. He completed his orthopedic training in the Harvard Combined Orthopedic Program and a fellowship in joint replacement surgery at the Robert Brigham Hospital. Aaron completed two research fellowships at the National Institutes of Health (NIH), one studying surgical physiology and one in basic cartilage biochemistry. He founded both the orthopedic laboratory and the joint replacement service at The Warren Alpert Medical School of Brown University.

Aaron’s clinical interests focus on joint diseases, particularly on osteoarthritis and avascular necrosis, and conservative therapies for joint preservation. Recent clinical investigations have concerned the role of knee arthroscopy, contrast-enhanced MRI for early diagnosis of osteoarthritis, and the prevalence of coagulopathies in both osteoarthritis and avascular necrosis. In the laboratory, he has been investigating the contributions of circulatory pathology to the initiation and progression of osteoarthritis. 

Aaron has served on 35 national panels, including ten NIH study sections, and committees of the Arthritis Foundation, American Academy of Orthopedic Surgeons and Orthopedic Research Society. He has authored over 100 scientific and clinical papers and three books. Several years ago, he received a Lifetime Achievement Award from the New England Arthritis Foundation.

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Valentin Antoci, MD, PhD is a fellowship-trained orthopedic surgeon who practices adult reconstruction, as well as hip and knee joint replacement, surgery. He has a particular interest in unicompartmental partial knee replacement, minimally invasive surgery, complex reconstructions, failed total joints, preservation techniques, and trauma.

Dr. Antoci earned his medical degree at Thomas Jefferson University in Philadelphia, and undertook extensive training at the Rothman Institute at Jefferson, in the Harvard Combined Orthopaedic Residency Program in Boston, and in the Harris Adult Reconstruction Fellowship Program at Massachusetts General Hospital.

His current research interests focus on joint implant design, tissue engineering, and biological interactions at the implant interface.

Dr. Antoci is a member of the American Academy of Orthopaedic Surgery, American Association of Hip and Knee Surgeons, and the Orthopaedic Research Society. Among his awards are the Infectious Diseases Society of America Edward H. Kass Fellowship and the Musculoskeletal Infection Society Jeannette Wilkins Award.

Julio Defillo-Draiby, MD is lead geriatrician for the Total Joint Center co-management program, and an assistant professor of medicine at The Warren Alpert Medical School of Brown University. He is board certified in internal medicine and geriatric medicine. His interests in geriatrics and orthopedics include the use of an interdisciplinary team for prevention of geriatric syndromes after elective joint replacement, as well as improving pain management and postoperative complications. He has conducted research on delirium education and is actively researching ways to improve outcomes by co-managing the geriatric patient after total joint replacement surgery.

Dr. Defillo-Draiby earned his medical degree from the Medical School at INTEC in Santo Domingo, Dominican Republic, and completed his residency at New York Medical College Metropolitan Hospital Center in New York, New York, where he served as chief resident and instructor of medicine. He subsequently completed a fellowship in geriatric medicine and clinical education at Yale University School of Medicine in New Haven, Connecticut.

Jack Goldstein, MD graduated from the University of California at Davis with a BA in Physiology in 1975. After two years of medical research, and graduate work in mechanical engineering, he received his MD from U.C. Davis in 1982.

His interest in orthopedic surgery developed because of his broad background, which included teaching woodworking and joinery at U.C. Davis, conducting biomedical research, as well as mechanical engineering coursework. After two years of general surgery, he completed an orthopedic surgical residency at Rutgers University in 1988. This fellowship was completed in 1989. He practiced sports medicine and general orthopedics from 1989 through 1991 in Hawaii, and then moved and continued to practice in Providence, Rhode Island.

Goldstein has extensive orthopedic sports medicine experience. He specializes in arthroscopic ligament reconstruction of the knee and shoulder, and arthroscopy of all joints. He also has extensive experience in total joint replacement, fracture care, and reconstructive treatment of deformity and length discrepancy using Ilizaroff techniques. He has a very broad experience because of training and practice in several states. In addition, Hawaii presented an unusual breadth of problems and experiences, including treatment of polio patients, and severe limb deformities referred from the far East.

Andrew Green, MD, is a fellowship-trained specialist in problems of the shoulder, elbow and upper extremity. Each year, he performs over 350 arthroscopic, reconstructive, joint replacement and trauma surgeries for these problems. Most commonly, he treats patients for rotator cuff disorders, dislocations and instability; arthritis; fractures and sports injuries.

As an associate professor of orthopedic surgery and chief of shoulder and elbow surgery at Brown Medical School, he is actively involved in shoulder research and the education of future orthopedic surgeons. He is the author of numerous articles and chapters regarding the shoulder.

Green is board-certified in orthopedic surgery, in addition to being a member in both the American Academy of Orthopaedic Surgeons and the American Shoulder and Elbow Surgeons. He is an internationally recognized expert in shoulder and elbow surgery.

Howard Hirsch, MD, is a 1986 graduate of The Warren Alpert Medical School of Brown University and specializes in adult reconstructive surgery.

Hirsch received his orthopedic surgery training at the University of Oklahoma Health Sciences Center in 1992 and completed his fellowship in joint implant surgery at the University of Pennsylvania in 1993.

Hirsch completed an A/O traumatology fellowship in Neuchatel, Switzerland in 1991. He became board-certified in 1995.

Derek Jenkins, MD, is an orthopedic surgeon and assistant professor at The Warren Alpert Medical School of Brown University. He earned his medical degree from Dartmouth Medical School, and completed his residency in general and orthopedic surgery at Lenox Hill Hospital in Manhattan, and a fellowship in adult reconstructive surgery at the Mayo Clinic in Rochester, Minnesota. He is a member of the American Academy of Orthopedic Surgeons and the American Association of Hip and Knee Surgeons. He specializes in adult reconstruction of the hip and knee, with a special interest in direct anterior total hip replacement, gap balanced total knee replacement, partial knee replacement and revision of failed/ infected joint replacements.


Roald Llado, MD is a fellowship-trained adult reconstruction orthopedic surgeon at The Miriam Hospital and a clinical assistant professor of family medicine at The Warren Alpert Medical School of Brown University.

After graduating from Duke University, he earned his medical degree and completed his residency training at the Drexel University College of Medicine, Philadelphia, PA. He subsequently completed a specialized fellowship in joint preservation and reconstruction at the Rubin Institute for Advanced Orthopedics at the Sinai Hospital of Baltimore, MD.

Llado’s orthopedic interests include minimally invasive primary and complex hip and knee replacement, reconstruction of fractures around prosthetic hip and knee implants and management of general orthopedic conditions and fractures. He has conducted research on periprosthetic joint infections as well as heterotopic ossification in less invasive total knee replacements.

E. Scott Paxton, MD is a member of the division of shoulder and elbow surgery and an assistant professor in the department of orthopaedic surgery at The Warren Alpert Medical School of Brown University.

Dr. Paxton received his medical degree from Washington University School of Medicine in St. Louis and completed his residency in the Orthopaedic Surgery Residency Training Program at Washington University School of Medicine and Barnes-Jewish Hospital.

He completed fellowship training in the treatment of problems of the shoulder and elbow at the renowned Rothman Institute in Philadelphia, where he trained with many of the world's leaders in shoulder and elbow surgery. He is actively involved in research related to shoulder and elbow disorders.

Dr. Paxton evaluates and treats rotator cuff tears and impingement, shoulder and elbow instability and dislocations, shoulder and elbow arthritis, shoulder and elbow fractures, malunions and nonunions of these fractures, tendon injuries of the shoulder and elbow, labral tears, throwing injuries, and other sports injuries of the upper extremity.

Orthopedic Surgeon

Richard Terek, MD is an orthopedic surgeon and musculoskeletal oncologist who specializes in reconstructive surgery and musculoskeletal oncology for adult and pediatric patients. He is an expert in the treatment of patients with bone and soft tissue tumors. He is actively engaged in medical education and is an NIH-funded investigator whose research is focused on understanding how bone cancer grows and spreads to other parts of the body, with the ultimate goal of developing new targeted therapies. He is professor in the department of orthopedic surgery at The Warren Alpert Medical School of Brown University.

Dr. Terek received his medical degree from the University of Chicago Pritzker School of Medicine in Chicago. He completed his orthopedic surgery residency at Loyola University Medical Center in Maywood, Illinois, and was an American Cancer Society Clinical Oncology Fellow in surgical oncology at Memorial Sloan-Kettering Cancer Center in New York, New York.

Dr. Terek is certified by the American Board of Orthopedic Surgery and is a fellow of the American Academy of Orthopedic Surgeons and the American College of Surgeons. He is past president of the Rhode Island Orthopedic Society and president-elect of the Musculoskeletal Tumor Society.

Learn more about the Orthopedics Institute »