Shoulder Dislocation: Causes, Symptoms & Modern Treatment (Bankart Repair)

A shoulder dislocation is a painful injury that occurs when the upper arm bone moves out of its normal position inside the shoulder socket. It can happen during sports, after a fall, or because of an accident. Although the shoulder can often be put back into place with appropriate medical treatment, the injury may also damage the ligaments, labrum, or bones that help keep the joint stable.

For some patients, a single dislocation is followed by a period of healing and rehabilitation. For others, the shoulder may repeatedly slip out of place, causing pain, fear of movement, and difficulty performing everyday activities.

One common injury associated with anterior shoulder dislocation is a Bankart lesion — detachment of the labrum, a ring of cartilage around the shoulder socket, from its normal attachment. In selected patients, arthroscopic Bankart repair can help restore the labrum and improve shoulder stability.

Understanding the Shoulder Joint

The shoulder is one of the most mobile joints in the human body, allowing us to lift our arms, reach overhead, rotate the shoulder, throw a ball, and perform everyday activities like dressing or combing our hair.

This is possible because the shoulder is a ball-and-socket joint — the rounded upper end of the humerus forms the ball, while the glenoid, a shallow part of the shoulder blade, forms the socket. Unlike the deeper hip socket, the shoulder socket is shallow, allowing greater range of movement but making it more dependent on soft tissues for stability.

The labrum, a ring of cartilage around the glenoid, helps deepen the socket and anchors important ligaments. The rotator cuff muscles also play a major role in controlling the humeral head's movement during shoulder activity.

Types of Shoulder Dislocation

Shoulder dislocations are generally classified according to the direction in which the humeral head moves.

Anterior dislocation is the most common type. The upper arm bone moves toward the front of the body and may injure the labrum and ligaments at the front of the shoulder.

Posterior dislocation occurs when the humeral head moves backward. It is less common and may be associated with certain types of trauma or seizures.

Inferior dislocation is uncommon and occurs when the upper arm bone moves downward, often with significant soft-tissue injury requiring urgent assessment.

Knowing the type of dislocation helps the doctor understand which structures may have been damaged and how the shoulder should be evaluated.

What Causes Shoulder Dislocation?

Shoulder dislocation usually occurs when an external force overwhelms the stabilizing structures of the joint.

Sports-related injury: Football, cricket, wrestling, rugby, and badminton can all place stress on the shoulder — a player may fall on an outstretched hand, collide with another player, or land directly on the shoulder. This isn't limited to professional athletes; weekend players are equally at risk.

Falls and road traffic accidents: Falling on an outstretched hand sends force through the arm that can push the humeral head out of the socket, while a direct fall onto the shoulder can damage the joint outright. Road accidents may produce greater force, sometimes with fractures or nerve injuries. Older adults may dislocate a shoulder even after a simple fall, particularly with reduced bone strength.

Previous shoulder dislocation: An earlier dislocation raises the risk of future instability, since it may stretch or tear the ligaments and labrum that hold the joint in place — a second episode can occur with less force than the first because the supporting structures are already weakened.

Ligament laxity: Some people naturally have looser ligaments, allowing more shoulder movement than usual; poor muscle control or repeated overhead activity can add to this. Laxity alone doesn't mean surgery is required — treatment depends on symptoms, tissue damage, and response to rehabilitation.

What Is a Bankart Lesion?

A Bankart lesion is a tear or detachment of the labrum at the front and lower part of the shoulder socket, commonly associated with anterior shoulder dislocation.

Imagine the shoulder socket as a shallow cup, with the labrum forming a cartilage rim around its edge that deepens it and anchors stabilizing ligaments. During a dislocation, the humeral head may pull the labrum away from the glenoid rim, reducing stability and making the joint more prone to dislocating again. A Bankart lesion may involve soft tissue alone, or occur with a glenoid rim fracture — known as a bony Bankart lesion.

A young football player, for example, may have his shoulder reduced with pain improving, but later notice instability when raising his arm or reaching backward, along with fear of another dislocation. Such symptoms may point to a labral injury requiring imaging. A Bankart lesion alone doesn't automatically mean surgery is necessary — age, activity level, and number of dislocations all factor into the decision.

Symptoms of Shoulder Dislocation

During an acute dislocation: Sudden, severe pain and inability to move the arm normally. The shoulder may look different from the opposite side, with swelling or bruising. Numbness, tingling, or weakness may indicate nerve involvement and require prompt assessment — an X-ray usually confirms the diagnosis.

After the shoulder has been reduced: Pain often improves, but the joint can remain sore and stiff. Some patients feel discomfort during overhead movement, weakness, or a sense that the shoulder isn't fully stable — a sensation sometimes called apprehension. These symptoms should not be ignored.

Recurrent instability: Patients may report the shoulder slipping during sports, work, or routine movement, sometimes fully dislocating and sometimes partially slipping and returning on its own. The frequency of episodes matters for how detailed the assessment needs to be.

What Should You Do Immediately After a Shoulder Dislocation?

A suspected shoulder dislocation should be treated as an urgent medical injury. Never try to force the shoulder back into place at home, as this can worsen damage to the joint, nerves, or blood vessels. Keep the arm still, support it with a sling if available, and apply a cold pack wrapped in cloth to reduce pain and swelling while awaiting medical attention.

Seek immediate care if the hand becomes numb, weak, pale, or cold — these may indicate nerve or blood vessel involvement. At the hospital, a doctor may perform a closed reduction, gently returning the humeral head to the socket with pain relief or sedation as needed. X-rays are commonly taken afterward to confirm alignment and identify associated fractures.

How Is Shoulder Dislocation Diagnosed?

Diagnosis begins with a detailed history and physical examination — how the injury occurred, whether it's a first episode, and prior instability — along with checks of shoulder movement, strength, stability, and nerve function.

X-rays are usually the first imaging test, confirming joint position and identifying fractures, both before and after reduction.

MRI and MR arthrography help evaluate soft-tissue injuries such as a Bankart lesion or rotator cuff damage, giving a more detailed view of the labrum in selected cases like recurrent dislocation with persistent apprehension.

CT scan may be used to evaluate bone loss or a glenoid fracture — important when planning surgery, since significant bone loss can influence which stabilization procedure is appropriate.

Modern Treatment Options for Shoulder Dislocation

Treatment depends on age, activity level, injury severity, number of dislocations, and the condition of supporting tissues. Some patients recover with non-surgical treatment, while others need surgery for persistent instability or structural damage.

Closed reduction: The first priority for an acute dislocation is restoring normal joint position, performed by a trained professional. Reduction restores alignment but does not necessarily repair a torn labrum or damaged ligaments — further assessment may follow.

.Immobilization: After reduction, the shoulder may be supported in a sling to protect healing tissue and reduce pain. Prolonged immobilization may cause stiffness, so duration should be individualized.

Physiotherapy and rehabilitation: This plays a major role in restoring movement and strength, targeting the rotator cuff, scapular muscles, and other stabilizing structures. Early recovery focuses on gentle movement and pain control; exercises then advance to strength, coordination, and confidence-building as healing progresses. Returning to heavy lifting or overhead sports too early increases the risk of reinjury.

When Is Bankart Repair Surgery Recommended?

Bankart repair is a surgical procedure used to repair a torn labrum and restore shoulder stability. It may be considered when a patient has recurrent dislocation, persistent instability, or a structural injury unlikely to be managed adequately with rehabilitation alone. The decision isn't based only on the presence of a Bankart lesion — age, activity level, sport type, number of dislocations, bone loss, and associated injuries all factor in.

Recurrent dislocation: A patient who repeatedly dislocates the shoulder may have an underlying structural problem raising the risk of recurrence, making surgical stabilization worth considering.

Persistent instability: Some patients don't experience a full dislocation but continue to feel the shoulder slipping or at risk of coming out. If this persists despite non-surgical treatment, stabilization surgery may be discussed.

Associated bone loss: When there is significant bone loss from the glenoid or humeral head, a Bankart repair alone may not be sufficient, and the surgeon may consider an alternative procedure — which is why a complete evaluation matters before deciding on surgery.

What Happens During Arthroscopic Bankart Repair?

Arthroscopic Bankart repair is a minimally invasive procedure used to reattach the torn labrum to the glenoid rim. The surgeon uses an arthroscope — a small camera inserted through a tiny incision — to examine the joint, with additional small incisions for specialized instruments. The torn labrum is identified, prepared, and reattached to its normal position using suture anchors, restoring the shoulder's anatomy and improving stability.

Afterward, the shoulder is protected while tissues heal, and the patient begins a structured rehabilitation program that varies by injury and procedure.

Bankart Repair Recovery: What to Expect

Recovery is gradual, and rehabilitation is a key part of the process.

Early recovery: The shoulder is generally protected in a sling, with some pain, swelling, and restricted movement. The surgical team provides guidance on permitted activities, and movements that stress the repaired tissue should be avoided.

Rehabilitation phase: As healing progresses, focus shifts to restoring movement and strength — starting with gentle range-of-motion exercises and advancing to strengthening of the rotator cuff and scapular muscles.

Return to sports: This should be based on recovery milestones rather than a fixed date. Athletes in overhead or contact sports typically need more rehabilitation time before resuming full activity.

Can Shoulder Dislocation Be Prevented?

Not every dislocation can be prevented, but certain measures may reduce risk. Regular strengthening exercises improve support from the rotator cuff and scapular muscles, while proper technique for throwing, landing, and lifting, along with a good warm-up, helps prepare the muscles for activity. Patients recovering from dislocation should avoid returning to strenuous activity before the shoulder has adequately healed. If the shoulder repeatedly slips out of place, a specialist assessment can help identify the cause and determine next steps.

When Should You Consult an Orthopaedic Shoulder Specialist?

Seek specialist assessment if your shoulder has dislocated more than once, feels unstable, or causes pain during overhead movement. Persistent symptoms should not be ignored, particularly when they interfere with sports, work, sleep, or daily activities. A timely evaluation can help identify the cause of instability and whether physiotherapy, arthroscopic stabilization, or another approach is appropriate.

Conclusion

Shoulder dislocation is more than a temporary displacement of the joint — it can damage the labrum, ligaments, and bones that contribute to shoulder stability. While many patients recover with non-surgical treatment, recurrent dislocation may require a more detailed assessment. Bankart repair is one of the modern surgical options used to address a torn labrum and help restore stability in selected patients.

Patients with shoulder dislocation, recurrent shoulder instability, or suspected Bankart lesions in Lucknow can consult Dr. Saurabh Jain, an Orthopedic & Sports Injury Surgeon specializing in arthroscopic and sports injury care, for an evaluation

Frequently Asked Questions