Labral Tears of the Shoulder in Boise

Anatomy and Function of the Shoulder Labrum

The shoulder is a ball and socket joint where the upper arm bone (humerus) meets the shoulder blade (scapula). The socket of the shoulder joint, known as the glenoid, is relatively flat and shallow compared to other ball and socket joints like the hip. To compensate for this shallow socket, a ring of strong, fibrous cartilage called the labrum surrounds the rim of the glenoid. The labrum serves several critical functions: it deepens the shoulder socket by up to 50%, significantly improving joint stability; it serves as an attachment point for the shoulder ligaments and the long head of the biceps tendon; and it acts as a bumper or gasket that helps keep the ball of the humerus centered within the socket during movement.

Types of Labral Tears

Labral tears are classified by their location on the glenoid rim and the structures involved. The most common types include:

• SLAP Tears (Superior Labrum Anterior to Posterior) — These tears occur at the top of the labrum where the long head of the biceps tendon attaches. SLAP tears are common in overhead athletes such as baseball players, tennis players, and swimmers. They are classified into several types (Type I through Type IV and beyond), with each type describing the extent and pattern of the tear.
• Bankart Lesions — A Bankart tear occurs at the lower front (anteroinferior) portion of the labrum and is most commonly associated with shoulder dislocations. When the shoulder dislocates forward, the labrum is often torn away from the glenoid rim, creating instability that can lead to recurrent dislocations.
• Posterior Labral Tears — These tears occur at the back of the labrum and are less common. They can result from repetitive microtrauma or a direct blow to the front of the shoulder that forces the humeral head backward.
• Degenerative Labral Tears — Over time, the labrum can fray and wear down as part of the normal aging process. These tears are more common in patients over the age of 40 and may or may not cause symptoms.

Causes of Labral Tears

Labral tears can result from both acute injuries and chronic, repetitive stress:

• Traumatic injury — A fall on an outstretched hand, a direct blow to the shoulder, or a sudden pulling force on the arm can tear the labrum. Shoulder dislocations and subluxations (partial dislocations) frequently cause labral tears.
• Repetitive overhead motions — Athletes who throw, swim, or perform repetitive overhead activities place significant stress on the labrum with each motion. Over time, this repetitive microtrauma can lead to labral fraying and tearing.
• Weightlifting — Heavy bench pressing, overhead pressing, and other weightlifting activities can stress the labrum, particularly when performed with improper form or excessive weight.
• Wear and tear — Degenerative changes associated with aging can weaken the labrum and make it more prone to tearing, even with relatively minor activities.
• Associated injuries — Labral tears often occur in combination with other shoulder injuries, including rotator cuff tears, bicep tendonitis, and shoulder instability.

Symptoms of a Labral Tear

The symptoms of a labral tear can vary depending on the type and location of the tear. Common symptoms include:

• A deep, aching pain in the shoulder joint that is difficult to pinpoint
• A catching, locking, popping, or grinding sensation during shoulder movement
• Pain with overhead activities such as reaching, throwing, or lifting
• A feeling of instability or the shoulder “slipping out of place”
• Decreased range of motion and stiffness
• Pain at night, particularly when sleeping on the affected shoulder
• Loss of strength, especially with overhead or behind-the-back movements
• Recurrent shoulder dislocations (particularly with Bankart lesions)

Diagnosis of Labral Tears

Diagnosing a labral tear requires a comprehensive evaluation by an experienced shoulder specialist. The physical examination includes specific provocative tests designed to stress the labrum in different locations. Tests such as the O’Brien’s test, anterior apprehension test, and crank test help identify the type and location of the tear. Standard X-rays are obtained to evaluate the bony structures and rule out fractures, bone spurs, or arthritis. Magnetic resonance imaging (MRI) is the primary imaging study for evaluating the labrum. An MRI arthrogram, which involves injecting contrast dye into the shoulder joint before the MRI scan, is often preferred because it provides superior visualization of labral tears and can detect tears that a standard MRI may miss. In some cases, diagnostic arthroscopy may be necessary to fully evaluate and confirm the extent of the labral tear.

Non-Surgical Treatment Options

Not all labral tears require surgery. Many patients, particularly those with degenerative tears or minor tears that do not cause significant instability, can be successfully managed with conservative treatment:

• Rest and activity modification — Avoiding activities that aggravate symptoms, particularly overhead motions and heavy lifting, allows inflammation to subside.
• Non-steroidal anti-inflammatory medications (NSAIDs) — Medications such as ibuprofen or naproxen help reduce pain and inflammation in and around the shoulder joint.
• Physical therapy — A structured rehabilitation program is essential for strengthening the rotator cuff and periscapular muscles that help stabilize the shoulder. Improving muscle strength and coordination can compensate for the loss of labral support and significantly reduce symptoms.
• Corticosteroid injections — An injection of cortisone into the shoulder joint can provide temporary relief from pain and inflammation, allowing patients to participate more effectively in physical therapy.

Surgical Treatment Options

Surgery is typically recommended for patients who do not improve with conservative treatment, those with significant instability or recurrent dislocations, and active individuals who need to return to demanding overhead activities. Most labral repairs are performed arthroscopically through small incisions using a camera and specialized instruments. Surgical options include:

• Labral repair — The torn labrum is reattached to the glenoid rim using small anchors (called suture anchors) that are placed into the bone. Sutures attached to the anchors are used to secure the labrum back in its proper position. This is the most common surgical treatment for Bankart lesions and many SLAP tears.
• Labral debridement — For degenerative tears or small, stable tears, the damaged and frayed tissue may be trimmed and smoothed rather than repaired. This can relieve symptoms of catching and pain without the longer recovery associated with a full repair.
• SLAP repair with or without biceps tenodesis — For SLAP tears, the surgeon may repair the labrum, or in some cases, especially in patients over 35-40 years of age, a biceps tenodesis may be performed instead. This involves detaching the biceps tendon from the labrum and reattaching it to the humerus, which eliminates the biceps as a source of pain while maintaining arm strength.
• Capsular shift or plication — In cases of significant instability, the surgeon may tighten the shoulder capsule (the ligamentous envelope surrounding the joint) in addition to repairing the labrum. This provides additional stability to the shoulder joint.

Recovery After Labral Tear Surgery

Recovery after arthroscopic labral repair requires patience and commitment to a structured rehabilitation program. The arm is typically immobilized in a sling for 4 to 6 weeks following surgery to protect the repair. Gentle, passive range of motion exercises are initiated during this period under the guidance of a physical therapist. Active motion and progressive strengthening begin at approximately 6 weeks and continue for several months. Most patients can return to desk work and light daily activities within 2 to 4 weeks. Return to full athletic activity, particularly overhead sports and contact sports, typically takes 4 to 6 months. Complete recovery, including full strength and confidence in the shoulder, may take up to 9 to 12 months for competitive athletes.

When to See a Shoulder Specialist

If you are experiencing shoulder pain accompanied by catching, clicking, or a feeling of instability, or if you have suffered a shoulder dislocation, it is important to be evaluated by an experienced shoulder specialist. Left untreated, labral tears can lead to progressive instability, recurrent dislocations, and the development of shoulder arthritis over time. Early diagnosis and appropriate treatment can help preserve shoulder function and allow you to return to your active lifestyle. Contact our office to schedule a consultation today.