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HSS Patient Lauren Procaccino



I am thankful every day for
being given the opportunity
to compete and simply walk
without pain daily.

- Lauren Procaccino

Hip Preservation Service

Specialists and researchers are leading the way in diagnosis and treatment of hip disorders that will relieve and preserve.

The Hip Preservation Service brings together the expertise and experience of various specialists who are focused on providing joint-preserving treatment options to young, active adult patients suffering from hip pain to restore a high level of function. Historically, these patients might have been previously misdiagnosed, or tolerated unrecognized symptoms, resulting in further deterioration of the hip joint.

Using a multi-disciplined approach to the understanding of hip pain and treatment, the Service combines the expertise of a wide variety of health care professionals including orthopedic surgeons, radiologists, physiatrists, physical therapists, and a multitude of musculoskeletal experts and clinical researchers so patients can benefit from a coordinated treatment experience. These options often involve minimally invasive treatments to help patients get back to their chosen activities and, in some cases, reduce the need for more extensive surgeries.

Hip Preservation Service multi-disciplinary meeting


Research shows that timely intervention for some hip conditions may slow or reverse their progression.

The hips are critical to our body’s mobility and stability. The joints, bones, muscles and ligaments of the hip and pelvic areas are intricately balanced but can be vulnerable to wear and tear. When viewed as part of a continuum, hip conditions and disorders range from preclinical disorders, which can be followed by early symptoms of hip disease, and disorders that can result in clear degenerative disease of the hip. Research shows that timely intervention for some conditions may slow or reverse their progression.

The Hip Preservation Service at HSS leads a multi-disciplined approach to expertly treat the broad range of hip conditions that can occur at any stage of life, including teens, active adults and seniors. New, improved, minimally invasive surgical techniques, including arthroscopy, have revolutionized the treatment of these conditions. The expertise of our leading scientists and clinicians throughout HSS is allowing us to identify various stages of hip disease and provide the tools for researchers to dig deeper into their underlying causes.

The Hip Joint

The hip joint is a “ball and socket” joint located where the thigh bone (femur) meets the pelvic bone. The upper segment (“head”) of the femur is a round ball that fits inside the cavity in the pelvic bone that forms the socket, also known as the acetabulum. The ends of the bone are covered with a smooth, cushioning layer called articular cartilage. The articular cartilage is what allows the bones to glide smoothly. While the cartilage covers the entire head of the femur, the acetabulum cartilage is in the shape of a horseshoe with a depression (fossa) in the center of the socket. This fossa contains soft tissue and a ligament connecting the femoral head to the socket.

Diagram of the hip joint noting the location of the Pelvic Bone, Healthy Cartilage, Acetabular (socket), Femur (thigh bone) and Femoral Head (ball)

The socket has a rim of rubbery fibrocartilage called the labrum. The labrum acts as a gasket, sealing in joint fluid and maintaining lubrication and nutrition. In addition, numerous tendons surround the hip, as well as bursae, which are lubrication "cushions" where soft tissues glide over bony prominences.

Many factors can cause hip pain or hip problems that would lead someone to seek medical treatment from an orthopedist. These include abnormal anatomy that a person is born with and conditions that develop during the growth and development of the bones grow in childhood or adolescence. Trauma, as well as the wear and tear that occurs with aging can all lead to progressive arthritic changes. Hip pain in athletes is commonly the result of a muscle strain or tendinitis. The diagnosis and management of hip injuries has evolved substantially with the advancement in diagnostic tools such as magnetic resonance imaging and with new minimally invasive techniques and in hip arthroscopy.

Our Team

Our team of medical specialists is committed to joint-preserving treatment options for the hip. They are knowledgeable in a range of treatment options from the nonsurgical to the most complex. Our comprehensive team approach utilizes experts in the fields of orthopedics, radiology, physiatry, sports medicine, physical therapy, rheumatology, and bio-engineering. Working hand-in-hand with our researchers, our staff is constantly evaluating and improving our surgical techniques and investigating new approaches.

Image - Profile photo of Ernest L. Sink, MDErnest L. Sink, MD - Orthopedic Surgery, Hip Preservation, Pediatrics
Image - Profile photo of Eric Bogner, MDEric Bogner, MD - Radiology
Image - Profile photo of Robert L. Buly, MDRobert L. Buly, MD - Orthopedic Surgery, Hip and Knee Replacement, Hip Preservation
Image - Profile photo of Stephanie Swensen Buza, MDStephanie Swensen Buza, MD - Orthopedic Surgery, Sports Medicine, Hip Preservation
Image - Profile photo of Struan H. Coleman, MD, PhDStruan H. Coleman, MD, PhD - Orthopedic Surgery, Sports Medicine, Hip Preservation
Image - Profile photo of David L. Helfet, MDDavid L. Helfet, MD - Orthopedic Surgery, Trauma, Hip Preservation
Image - Profile photo of Bryan T. Kelly, MD, MBABryan T. Kelly, MD, MBA - Orthopedic Surgery, Sports Medicine, Hip Preservation
Image - Profile photo of Douglas N. Mintz, MDDouglas N. Mintz, MD - Radiology, Hip Preservation
Image - Profile photo of Peter J. Moley, MDPeter J. Moley, MD - Physiatry, Sports Medicine, Spine, Hip Preservation
Image - Profile photo of Danyal H. Nawabi, MD, FRCSDanyal H. Nawabi, MD, FRCS - Orthopedic Surgery, Sports Medicine, Hip Preservation
Image - Profile photo of Benedict Nwachukwu, MD, MBABenedict Nwachukwu, MD, MBA - Orthopedic Surgery, Sports Medicine, Hip Preservation
Image - Profile photo of Anil S. Ranawat, MDAnil S. Ranawat, MD - Orthopedic Surgery, Sports Medicine, Hip Preservation
Image - Profile photo of Edwin P. Su, MDEdwin P. Su, MD - Orthopedic Surgery, Hip and Knee Replacement, Hip Preservation

For Patients

As our understanding of structural abnormalities in the hip has increased, our specialists have been able to better identify underlying conditions in earlier stages, providing patients with more treatment options that help to preserve the integrity of the hip joint, including both arthroscopic and open surgical techniques.

For Professionals

In addition to improved patient treatment and outcomes research, another focus of the Service is creating continuing education programs for the broader medical community about properly recognizing hip conditions and understanding when specialized care is needed.

Continuing Education

The Professional Education Department provides information to health care professionals through a variety of medical education programs, including continuing medical education lecture series, conferences and symposiums. The department is dedicated to providing timely educational resources to primary care physicians, sub-specialists, managed care groups, primary care hospitals and associated health professionals. The department also provides a mix of state-of-the-art live programs in addition to online program offerings, monographs, hands-on, skill-based sessions, and didactic lectures. HSS offers a range of on-site professional and continuing medical education programs related to hip pain, preservation, and treatment.

Hip Preservation Fellowship

The goal of the Hip Preservation Fellowship is to offer the fellow clinical experience in the recognition and management of hip pain in the young, active adult hip. In addition to providing clinical opportunities in outpatient settings, the program is also designed so that the fellow will have an active and broad surgical experience, including arthroscopic procedures of the hip, complex hip and pelvis osteotomies, and open surgical dislocations of the hip. The fellow will also interact with other members of the care team, including radiologists, physiatrists, physical therapists, and researchers. This multidisciplinary approach allows the fellow to broaden his or her knowledge base in a wide range of hip conditions and their respective treatment protocols.

How to Make a Referral

You or your patient can call the Hip Preservation Service by telephone weekdays between 9am and 5pm ET at 800.796.0473. On evenings and weekends, leave a voice message and we will return your call.

HSS Connect will answer any questions you may have.


Our Service researchers are establishing a clinical database to evaluate diagnosis and treatment options that will benefit our patients as well as the outside world. Researchers are focusing on new ways and techniques to treat hip pain. One of the goals of the Service's research will be to learn if hip arthroscopy will change the course of arthritis. Research will look deeper into the underlying causes of osteoarthritis of the hip through imaging and biomechanical studies and focus on new surgical techniques and hip preserving procedures.

Clinical Trial: To Understand the Reason for Motion Limitations in Patients with FAI

The Motion and Muscle Analysis in Individuals with Femoral Acetabular Impingement: A Pilot Study

Femoroacetabular Impingement (FAI) occurs when the ball (head of the femur) does not have full range of motion in the socket (acetabulum of the pelvis) due to excess bone. The resulting friction in the hip joint can cause damage to the soft tissue that lines the socket. People with FAI experience pain during common daily activities such as sitting, stair climbing, and even walking. It is currently unclear how the abnormal bone and soft tissue injury affect the muscles around the hip, and why this causes a change in walking patterns and movement.

The Motion and Muscle Analysis in Individuals with Femoral Acetabular Impingement: A Pilot Study will help to better understand how selected hip muscles contribute to different motions. Subjects enrolled in the study, including people with FAI and people with normal anatomy are tested at the Leon Root, M.D Motion Analysis Lab. Reflective markers and electrodes are attached to the body so motion can be recorded on video and electrical activity from muscles can be measured during walking, stair climbing, and other exercise type activities.

Understanding the reason for motion limitations in patients with FAI will help to develop more effective nonsurgical treatments and postoperative rehabilitation plans.

This research study is currently recruiting both healthy male volunteers age 18-46 and males age 18-45 who have been diagnosed with FAI.


Our registry will enable our clinicians to analyze clinical, radiographic and imaging data on patients to document outcomes for two, five, ten and twenty years following treatment. The registry will help investigators learn which patients make the best candidates for hip arthroscopy and will aid in the development of optimal standards of care and treatment, as well as offer non-operative solutions.

Why choose HSS? Our patients say it best.