Hip preservation is a branch of orthopedic medicine focused on treating structural problems in the hip joint before they progress to arthritis, with the goal of keeping your natural hip intact and delaying or avoiding hip replacement. It includes both surgical and non-surgical approaches that correct abnormal bone shapes, repair damaged cartilage and soft tissue, and restore normal joint mechanics. The field primarily serves younger, active patients whose hips have fixable structural issues rather than widespread joint degeneration.
Why the Hip Needs “Preserving”
The hip joint works like a ball and socket. The round top of the thighbone (the ball) sits inside a cup-shaped hollow in the pelvis (the socket). A ring of tough cartilage called the labrum lines the rim of the socket, and a layer of smooth articular cartilage covers both surfaces so they glide against each other with minimal friction. When the ball and socket don’t fit together properly, abnormal contact between them grinds away at the labrum and cartilage over time. Once enough cartilage is lost, the result is osteoarthritis.
Hip preservation intervenes in that process early. By fixing the structural mismatch before cartilage damage becomes irreversible, surgeons aim to restore normal mechanics and protect the joint’s remaining healthy tissue. The alternative for many of these patients would be years of worsening pain followed by a total hip replacement, a procedure that has a finite lifespan and carries activity restrictions that matter a great deal to someone in their twenties or thirties.
Conditions That Hip Preservation Addresses
The most common condition in this field is femoroacetabular impingement, or FAI. FAI occurs when extra bone grows on the ball, the socket, or both, causing them to collide during normal movement. There are two types. A cam deformity means the ball isn’t perfectly round, so it jams against the socket’s rim during deep bending or twisting. A pincer deformity means the socket’s rim extends too far over the ball, pinching the labrum. Many people have a combination of both.
FAI is closely linked to labral tears. In a review of CT scans from 137 patients with confirmed labral tears, 90% had structural abnormalities associated with impingement. Cam deformities tend to cause concentrated cartilage damage at the front-top of the socket, while pincer deformities produce more widespread labral damage around the entire rim.
Hip dysplasia is the other major condition. In a dysplastic hip, the socket is too shallow, leaving the ball without enough bony coverage. This concentrates weight-bearing forces on a smaller area and stretches the labrum beyond what it can handle. Some people are born with dysplasia; others have borderline coverage that only becomes symptomatic with high-demand activities. Participation in cutting and pivoting sports like hockey, soccer, football, and basketball during adolescence can also drive the development of cam deformities and early cartilage wear.
Less common conditions include the aftereffects of childhood hip disease (Legg-Calvé-Perthes), abnormal angles of the thighbone (coxa valga or vara), and isolated cartilage injuries.
How Doctors Evaluate the Hip
Diagnosis relies heavily on imaging. Standard X-rays come first, providing key measurements that guide treatment decisions. The center-edge angle measures how much of the ball is covered by the socket: below 20 degrees indicates dysplasia, 25 to 39 degrees is normal, and 40 or above signals over-coverage. The alpha angle measures the roundness of the ball at the head-neck junction, with anything above 55 to 60 degrees pointing toward a cam deformity.
MRI is the preferred tool for investigating soft tissue. It reveals labral tears, cartilage damage, and bone marrow changes that X-rays miss. Magnetic resonance arthrography, where contrast fluid is injected into the joint before the scan, is considered the gold standard for assessing labral and cartilage health because the fluid seeps into tears and defects, making them easier to see. Together, these measurements and images let the surgical team determine exactly what’s wrong structurally and whether correction is likely to help.
Who Is a Candidate
Two factors dominate the decision about whether hip preservation is appropriate: age and how much arthritis is already present on imaging. Research from the American Academy of Orthopaedic Surgeons found that these two variables drove the appropriateness classification almost exclusively. Patients under 40 with minimal or no arthritis on X-rays were overwhelmingly considered appropriate candidates, while those over 65 or with established arthritis were rarely considered appropriate. Factors like pain level and range of motion, somewhat surprisingly, did not meaningfully change the classification.
This makes intuitive sense. The entire premise of preservation is that the joint still has enough healthy cartilage to save. Once arthritis has progressed past a certain point, reshaping the bones won’t reverse the damage already done, and a hip replacement becomes the more reliable option.
Surgical Procedures
Hip Arthroscopy
Hip arthroscopy is a minimally invasive procedure performed through small incisions using a camera and specialized instruments. The surgeon can repair or reconstruct a torn labrum, smooth out damaged cartilage, stimulate new cartilage growth through microfracture (drilling tiny holes in exposed bone), and shave down a cam deformity to restore the ball’s round shape. It’s the most commonly performed hip preservation surgery, particularly for FAI and labral tears.
Ten-year data on young adults who underwent hip arthroscopy with labral treatment show a survivorship rate of 91.8%, meaning more than 9 in 10 patients still had their natural hip and had not required a hip replacement a decade later.
Periacetabular Osteotomy
For hip dysplasia, the problem isn’t a bump on the bone but a socket that doesn’t cover enough of the ball. Arthroscopy alone can’t fix that. A periacetabular osteotomy, or PAO, is an open surgery in which the surgeon cuts the bone around the socket in a carefully planned pattern, then rotates the socket fragment into a better position over the ball. This redistributes weight-bearing forces across a larger area and reduces the strain on the labrum. The procedure is more involved than arthroscopy, with a longer recovery, but it addresses a problem that no less invasive technique can correct.
In some cases, surgeons combine both procedures. Arthroscopy is performed first to inspect the joint and treat any labral tears or cartilage damage, followed by the osteotomy to reposition the socket. This two-step approach handles both the soft tissue injury and the underlying bony deficiency in a single surgical session.
Non-Surgical Management
Not every structural hip problem requires surgery. Conservative management is typically the first step, and for some patients it provides enough relief to stay active without an operation. A structured approach generally moves through phases: first controlling acute pain with anti-inflammatory medication and temporary activity modification, then beginning physical therapy focused on strengthening the muscles around the hip.
Physical therapy protocols in hip preservation focus on several specific goals. Strengthening the hip abductors and deep external rotators helps stabilize the joint. Core and pelvic stability training reduces compensatory movement patterns that can worsen impingement. Stretching improves available range of motion, while neuromuscular and balance training restore coordinated control of the hip during walking, running, and sport. Manual therapy targeting the soft tissues around the hip and gait retraining round out the program. Education on activity modification is also a consistent element, teaching patients which movements and positions to avoid.
A typical conservative trial lasts about three months. If symptoms persist after that period and imaging confirms a structural problem that can be surgically corrected, the conversation shifts toward surgical options.
Recovery After Surgery
Recovery timelines vary significantly depending on which procedure you have. After hip arthroscopy, most patients use crutches for two to four weeks, begin formal physical therapy within the first week or two, and return to desk work within a few weeks. Return to full sport typically takes four to six months, depending on the extent of the repair.
Recovery from a periacetabular osteotomy is longer because bone needs time to heal. Patients are generally on crutches with limited weight bearing for six to eight weeks, and full recovery to high-level activity can take six months to a year. Physical therapy plays a central role in both scenarios, progressing from gentle range-of-motion work in the early weeks to strengthening and eventually sport-specific training.
Regardless of the procedure, rehabilitation is individualized. The specifics depend on what was repaired, how much cartilage damage existed before surgery, and what level of activity you’re trying to return to.
How It Differs From Hip Replacement
Hip replacement removes the damaged ball and socket entirely and substitutes metal and plastic components. It’s highly effective for end-stage arthritis but comes with trade-offs: implants wear out over time (a concern for younger patients who may outlive their prosthesis), certain high-impact activities are discouraged, and revision surgery to replace a worn-out implant is more complex than the original procedure.
Hip preservation takes the opposite approach. It keeps your own bone, cartilage, and soft tissue, correcting the structural problem that’s causing damage rather than replacing the joint. When successful, it lets patients return to demanding physical activities without the long-term limitations of an artificial joint. The catch is that it only works when there’s still enough healthy tissue to work with, which is why early diagnosis matters so much.