Labrum

What it is

The labrum is a thick, fibrocartilage rim that lines the edge of the ball-and-socket joint sockets. In the shoulder, it lines the glenoid (the socket of the scapula). In the hip, it lines the acetabulum (the socket of the pelvis). Think of the labrum as a chewing gum border that deepens the socket, like putting a raised edge on a shallow cup.

The labrum serves two purposes: it deepens the socket, making it harder for the ball (the femoral head in the hip, the humeral head in the shoulder) to slip out, and it anchors ligaments that provide stability. A healthy labrum is firm and provides a tight seal.

Shoulder labral tears: SLAP and Bankart

SLAP tears (Superior Labral Anterior to Posterior) occur at the top-back of the shoulder socket. Often the result of repetitive overhead activities, throwing sports, or falling on an outstretched arm. Athletes complaining of deep shoulder pain with overhead reaching, or a clicking sensation, may have a SLAP tear. Many SLAP tears are partial and may not need surgery initially, but some progress.

Bankart tears occur at the front-bottom of the shoulder socket, classically after a shoulder dislocation. When the ball pops out of the socket, it often tears the labrum. If the labrum tears off completely, the shoulder is more likely to dislocate again. Bankart repair (reattaching the labrum to bone) is common after recurrent dislocations.

Hip labral tears and FAI

Hip labral tears can occur from a single traumatic event (a fall or high-impact collision) or develop gradually from repetitive stress. Femoroacetabular impingement (FAI) is a common cause. FAI means the femoral head is bony or the socket is irregular, causing the labrum to be pinched with hip flexion. Over time, this pinching tears the labrum.

Patients with hip labral tears often describe clicking, catching, or a feeling of the hip wanting to pop out. Pain is usually in the groin or front of the hip. Young, active athletes are most commonly affected.

Diagnosis and imaging

MRI with contrast (magnetic resonance arthrography, or MRA) is the gold standard for visualizing labral tears. The contrast dye fills the joint space, highlighting tears and separations. Physical examination findings, like the O’Brien’s test for the shoulder or the FABER test for the hip, support the diagnosis but aren’t definitive.

Some labral tears are found incidentally on imaging done for other reasons and cause no symptoms. A tear alone doesn’t always require surgery — the clinical picture matters.

Non-operative management

Small labral tears with minimal symptoms often respond to conservative care. Activity modification — avoiding movements that pinch the labrum — provides relief. Physical therapy strengthens the rotator cuff (shoulder) or hip muscles to stabilize the joint and reduce stress on the labrum. Corticosteroid injections may reduce inflammation. PRP is used at some centers to stimulate healing, though evidence is emerging.

This approach works for many asymptomatic or mildly symptomatic tears. The labrum doesn’t need surgery just because it’s torn; it needs surgery when symptoms don’t respond to conservative care.

When surgery is appropriate

• Persistent pain despite conservative care. If 3–6 months of activity modification, therapy, and possibly injections don’t relieve symptoms, surgery may be warranted.
• Mechanical symptoms. Clicking, catching, or a sense of instability suggests the torn labrum is loose and moving. Arthroscopic repair or debridement often resolves these symptoms.
• Recurrent instability. For shoulder dislocation from a Bankart tear, repair prevents recurrence.
• FAI with labral damage. Sometimes the bony anatomy causing the impingement is trimmed (femoral head osteoplasty or acetabular rim trimming) simultaneously with labral repair.

Surgical options

Labral repair means reattaching the torn labrum to bone using sutures or anchors. This preserves the labral tissue and is the preferred approach for traumatic tears in younger patients.

Labral debridement means trimming away the damaged tissue. It’s used when the tear is complex, the tissue is severely degenerated, or repair isn’t possible. Debridement relieves catching and inflammation but doesn’t restore the labrum’s protective depth.

Labral reconstruction involves grafting tissue (autograft or allograft) to replace lost labrum. This is reserved for large defects or failed prior repairs.

Recovery timeline

A repair or debridement arthroscopy is a day procedure. Return to sport depends on the extent of damage and the operation. A simple debridement might allow return in 4–6 weeks. A labral repair requires 8–12 weeks of protected motion before aggressive therapy, and 4–6 months before full sport participation. The labrum needs time to heal to bone before being loaded heavily.

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