Shoulder Dislocations and Shoulder Instability in Atlanta
Learn how a shoulder dislocates, what can tear during the injury, why age changes the injury pattern and when recurrent instability may require surgical treatment.
Do not attempt to force the shoulder back into place yourself. Seek emergency evaluation for visible deformity, severe pain, inability to move the arm, numbness, weakness, a cool or pale hand, or loss of a pulse.
Why Is the Shoulder Vulnerable to Dislocation?
The shoulder is a ball-and-socket joint, but the socket is relatively shallow compared with the size of the humeral head. This design provides exceptional motion while relying heavily on the labrum, capsule, ligaments, rotator cuff and surrounding muscles for stability.
A dislocation occurs when the ball moves completely out of the socket. A subluxation is a partial separation in which the joint shifts out of position but does not remain completely dislocated.
How Does a Shoulder Dislocation Occur?
The direction of force and position of the arm influence where the humeral head moves and which structures are damaged.
Anterior Dislocation
The humeral head moves forward, usually when the arm is forced away from the body and rotated backward. This can happen during a fall, collision, tackle, overhead sports injury or forceful reaching movement.
Abduction and external rotation
Posterior Dislocation
The humeral head moves backward. Posterior dislocations may occur after a seizure, electrical injury, direct force to the front of the shoulder or trauma while the arm is positioned across the body and internally rotated.
Adduction and internal rotation
Inferior Dislocation
The humeral head moves below the socket, often after a severe force with the arm elevated overhead. The arm may become fixed above the head and associated nerve or blood-vessel injuries require careful assessment.
Urgent neurovascular evaluation
What Can Tear or Break During a Dislocation?
A dislocation is more than the ball temporarily leaving the socket. The event may injure several structures that provide stability, strength and sensation.
Bankart Labral Tear
The anterior-inferior labrum may separate from the edge of the socket. This common injury can contribute to recurrent instability.
Capsule and Ligaments
The capsule and glenohumeral ligaments may stretch, tear or detach, leaving the shoulder less able to remain centered during movement.
Hill-Sachs Lesion
The humeral head may strike the socket edge, creating a compression defect in the bone. The size and position can affect recurrent instability.
Glenoid Bone Loss
The front edge of the socket may fracture or gradually lose bone after repeated dislocations, making soft-tissue repair alone less reliable.
Rotator Cuff Tear
One or more cuff tendons may tear, particularly in patients around age 40 and older or when the tendon was already weakened.
Nerve Injury
The axillary nerve or brachial plexus may be stretched. Numbness over the outer shoulder, deltoid weakness or persistent arm weakness requires evaluation.
Fracture
The greater tuberosity, humeral head, surgical neck or glenoid rim may fracture during the injury, especially after higher-energy trauma or in older bone.
SLAP or Biceps Injury
The superior labrum and long-head biceps attachment may also be damaged depending on the mechanism and direction of force.
What Tends to Tear at Different Ages?
Age does not create an absolute cutoff, but it changes which associated injuries deserve the greatest attention.
Younger patients commonly sustain injury to the labrum, capsule and ligaments. A Bankart tear may permit the shoulder to slip or dislocate again.
✓ Capsular stretching or tearing
✓ Hill-Sachs lesion
✓ Recurrent instability
✓ Glenoid bone loss after repeat events
Rotator cuff tearing becomes increasingly important as tendon quality changes with age. Fractures and nerve injuries must also be considered.
✓ Greater tuberosity fracture
✓ Axillary nerve injury
✓ Persistent weakness after reduction
✓ Combined cuff and labral injury
Symptoms That Deserve Further Evaluation
Pain immediately after a dislocation is expected. Persistent weakness, numbness, instability or inability to regain motion may indicate an associated structural injury.
How Is a Shoulder Dislocation Evaluated?
Evaluation should identify both the direction of the dislocation and the injuries that occurred when the joint came out of place.
Physical Examination
Strength, motion, sensation, pulses, deltoid function, apprehension and signs of associated cuff or nerve injury are assessed.
X-Rays
X-rays confirm joint alignment and look for fractures, glenoid injury, greater tuberosity injury and other bone damage.
MRI
MRI can evaluate the labrum, capsule, rotator cuff, biceps tendon, cartilage and muscle quality when a soft-tissue injury is suspected.
CT Scan
CT is especially useful when bone loss, a glenoid fracture, a large Hill-Sachs lesion or complex recurrent instability is suspected.
Why Does the Shoulder Keep Dislocating?
The first dislocation may stretch or detach the structures that normally prevent the humeral head from leaving the socket.
Repeated events can enlarge labral injury, stretch the capsule and increase bone loss from the socket or humeral head. This can make instability occur with progressively less force.
✓ Repeated partial slipping or subluxation
✓ Apprehension with the arm overhead
✓ Instability during sleep or daily activities
✓ Inability to return to contact or overhead sports
✓ Progressive bone loss on imaging
How Are Shoulder Dislocations Treated?
Treatment depends on age, activity level, number of dislocations, direction of instability, associated injuries and the amount of bone loss.
Nonsurgical Care
Many first-time dislocations can be treated without surgery after the joint has been safely reduced and associated fractures, cuff tears and nerve injuries have been evaluated.
✓ Pain and inflammation management
✓ Progressive range-of-motion therapy
✓ Rotator cuff and scapular strengthening
✓ Gradual return to activity
✓ Monitoring for recurrent instability
When Surgery May Be Considered
Surgery may be discussed when the shoulder repeatedly dislocates or subluxates, when instability prevents return to activity, or when imaging shows structural damage unlikely to remain stable with rehabilitation alone.
✓ Repeated symptomatic subluxations
✓ High-risk athletic demands
✓ Significant labral detachment
✓ Glenoid or humeral bone loss
✓ Associated repairable cuff tear
Types of Shoulder Stabilization Surgery
The operation should address the specific combination of labral injury, capsular stretching and bone loss rather than treating every unstable shoulder the same way.
Arthroscopic Bankart Repair
The detached labrum and capsule are repaired back to the glenoid using sutures and anchors.
Capsular Tightening
Stretched capsular tissue may be tightened to reduce excessive translation of the humeral head.
Remplissage
Selected Hill-Sachs defects may be treated by attaching posterior soft tissue into the defect to reduce engagement.
Bone Reconstruction
Significant socket bone loss may require a bone-restoring procedure rather than an isolated labral repair.
Rotator Cuff Repair
A symptomatic acute cuff tear may require repair, sometimes together with treatment of instability.
Fracture Treatment
Displaced greater tuberosity, glenoid or proximal humerus fractures may require fixation or reconstruction.
Recovery After a Shoulder Dislocation
Recovery varies depending on whether the injury is treated nonsurgically, whether surgery is required and which associated structures were damaged.
Short-term sling use, pain control and protection while the initial inflammation settles.
Guided exercises progressively restore comfortable and controlled shoulder movement.
Rotator cuff, deltoid and scapular muscles are strengthened to improve dynamic control.
Work, overhead activity, contact sports and throwing are reintroduced according to healing and stability.
Explore Related Shoulder Conditions
Shoulder dislocations may overlap with labral tears, rotator cuff injuries, biceps pathology and broader shoulder reconstruction.
Shoulder Dislocation FAQs
Should I try to put a dislocated shoulder back into place?
No. Attempting to force the shoulder back into place may worsen a fracture, nerve injury or blood-vessel injury. A visibly deformed or unreduced shoulder requires urgent medical evaluation.
What usually tears when a younger person dislocates a shoulder?
Younger patients commonly injure the anterior-inferior labrum, capsule and ligaments. A Bankart lesion is a labral detachment that may contribute to recurrent instability.
What commonly tears after a dislocation in someone over 40?
Rotator cuff tears become increasingly important after approximately age 40. Persistent weakness or inability to raise the arm after reduction should prompt evaluation for a cuff tear, fracture or nerve injury.
What is a Bankart tear?
A Bankart tear occurs when the labrum separates from the front and lower portion of the glenoid after an anterior shoulder dislocation.
What is a Hill-Sachs lesion?
A Hill-Sachs lesion is a compression defect in the humeral head created when it impacts the edge of the socket during an anterior dislocation.
Does every first shoulder dislocation require surgery?
No. Many first-time dislocations can be treated with temporary protection and rehabilitation. Surgery may be considered based on age, activity demands, recurrence risk and associated structural injury.
When is shoulder stabilization surgery considered?
Surgery may be considered for recurrent dislocations, repeated subluxations, inability to return to work or sports, significant labral injury or clinically important bone loss.
Do I need an MRI after a shoulder dislocation?
Not every patient needs immediate MRI. MRI may be recommended when persistent weakness, recurrent instability, a rotator cuff tear, labral injury or another soft-tissue injury is suspected.
Can a shoulder dislocate again?
Yes. Damage to the labrum, capsule, ligaments or bone may leave the shoulder vulnerable to recurrent instability. Risk varies with age, activity level and the severity of structural injury.
Can I request a second opinion for recurrent shoulder instability?
Yes. A second opinion can review previous imaging, identify labral or bone injury and help determine whether rehabilitation, arthroscopic stabilization or bone reconstruction is most appropriate.
Has Your Shoulder Dislocated, Shifted or Slipped Out Again?
Schedule an evaluation to review the injury, identify associated labral, cuff or bone damage and discuss options for restoring shoulder stability.
This page is provided for general educational purposes and does not constitute medical advice, diagnosis or a physician-patient relationship. A shoulder that remains visibly dislocated, a cold or pale hand, loss of pulse, severe numbness or progressive weakness requires urgent medical evaluation.