Sternoclavicular joint injuries causes symptoms and treatment

The sternoclavicular joint is one of the most important joints of the shoulder because it connects the clavicle to the shoulder girdle and allows the arm to move upward and sideways. Injuries to this joint are very common, whether caused by sports activities, falls, or everyday accidents, and they often lead to pain, swelling, and partial or complete loss of shoulder movement.Early diagnosis and proper treatment are essential to avoid complications such as chronic pain, loss of strength, or joint deformity. In this Dalili Medical article, we will discuss the causes of sternoclavicular joint injuries, their symptoms and types, methods of diagnosis, and available treatment options—both non-surgical and surgical—as well as important tips for recovery and prevention.

1️⃣ What Is the Sternoclavicular Joint?

The sternoclavicular joint is the joint that connects the clavicle (collarbone) to the shoulder girdle, allowing the shoulder to move upward and sideways. It also plays a key role in maintaining shoulder stability during daily and sports activities.

2️⃣ Can Sternoclavicular Joint Dislocation Occur Without Severe Pain?

In mild injuries, pain may be minimal and tolerable. However, more serious injuries—such as partial or complete dislocation—are usually very painful and require careful medical evaluation.

3️⃣ Can You Return to Sports After a Sternoclavicular Joint Dislocation?

Yes. With proper treatment, physical therapy, and strengthening exercises, most people can return to sports within 3–6 months, depending on the severity and type of injury.

4️⃣ Is Physical Therapy Enough for All Injuries?

Mild to moderate injuries usually improve with physical therapy alone.
Severe injuries or complete dislocations may require surgical intervention to restore joint stability and strength.

5️⃣ What Is the Difference Between Partial and Complete Dislocation?

Partial dislocation: Ligaments are partially damaged, the joint remains relatively stable, and deformity is mild.
Complete dislocation: Ligaments are completely torn, the joint becomes unstable, deformity is obvious, and pain is severe.

6️⃣ Are There Possible Complications If the Injury Is Not Treated?

Yes. Untreated sternoclavicular joint injuries may lead to:

Chronic persistent pain
Loss of strength or difficulty moving the shoulder
Visible joint deformity
Shoulder stiffness and limited range of motion
Increased risk of recurrent injury during sports or daily activities

7️⃣ Can the Joint Dislocate Again After Treatment?

Yes. If the joint does not fully stabilize or the ligaments remain weak, sudden movements or falls may cause recurrent dislocation.

8️⃣ Do All Surgeries Have the Same Recovery Time?

No. Recovery time depends on the type of surgery:

Ligament or screw fixation: about 6–12 weeks to regain full strength
Distal clavicle resection: usually faster recovery, around 4–6 weeks for daily activities
Arthroscopic surgery: faster healing, less pain, and earlier movement exercises

9️⃣ Is There a Difference Between Athletes and Non-Athletes?

Athletes require a longer rehabilitation period to fully strengthen the shoulder before safely returning to sports.
Non-athletes often return to daily activities faster, but strength may be lower if strengthening exercises are not followed.

???? Can the Injury Be Completely Prevented?

Not all sternoclavicular joint injuries can be prevented, but the risk can be reduced by:

Strengthening the shoulder and surrounding muscles
Using protective techniques during sports or weightlifting
Avoiding sudden movements or falls on the shoulder

???? When Should You See a Doctor Immediately?

Seek medical attention right away if you experience:

Severe pain that does not improve with simple painkillers
Noticeable swelling or deformity of the shoulder
Inability to raise the arm or move the shoulder normally
Signs of infection after surgery, such as fever, redness, or discharge

⏳ Recovery Period After Sternoclavicular Joint Injuries

1️⃣ Recovery Without Surgery

Usually takes 2–6 weeks, depending on injury severity
Includes rest, use of a brace or supportive bandage, and gentle movement exercises under medical supervision

2️⃣ Recovery After Surgery

Arm sling: 3–6 weeks to protect the joint
Gentle movement exercises: start after about 2 weeks
Strengthening exercises: gradually after 6–12 weeks, based on medical and physical therapy assessment

????‍♂️ Return to Sports

Athletes can usually return to sports after 3–6 months, depending on injury severity, type of dislocation, and treatment success.
Gradual physical therapy exercises are essential to prevent re-injury or joint weakness.

????️ Prevention of Sternoclavicular Joint Injuries

Use shoulder protection during sports or heavy lifting
Strengthen shoulder and back muscles with regular exercises
Avoid sudden movements or falls onto the shoulder whenever possible

???? Causes of Sternoclavicular Joint Injuries

The sternoclavicular joint connects the clavicle to the shoulder girdle, and injuries are common, especially among athletes or after accidents. Main causes include:

1️⃣ Falls on the Shoulder or an Outstretched Hand

The most common cause
Direct impact on the shoulder or extended hand can stress the joint, leading to ligament tears or dislocation

2️⃣ Sports Injuries

Contact or high-risk sports such as football, rugby, basketball, skating, or combat sports
Sudden movements or falls often result in joint injury

3️⃣ Traffic Accidents

Car or motorcycle collisions can cause direct shoulder impact, leading to joint dislocation or fractures

4️⃣ Chronic Overuse

Repeated heavy lifting or continuous arm use (manual labor or weight training)
Long-term overuse may weaken ligaments and cause joint degeneration

5️⃣ Previous Fractures or Deformities

Prior clavicle fractures or injuries to surrounding bones
Anatomical abnormalities or weakened ligaments after previous injuries increase the risk of re-injury

Symptoms of Acromioclavicular (AC) Joint Injuries

Injuries to the acromioclavicular joint range from mild ligament sprains to complete dislocations. Symptoms vary depending on the severity of the injury:

1️⃣ Shoulder Pain

Localized pain at the top of the shoulder, especially when pressing on the joint.
Pain increases when lifting the arm or making sudden shoulder movements.

2️⃣ Swelling and Bruising

Swelling around the joint shortly after injury.
Bruising may appear within hours or days.

3️⃣ Limited Shoulder Movement

Pain or difficulty when raising the arm forward or to the side.
Daily activities such as carrying bags or lifting objects become painful.

4️⃣ Visible Shoulder Deformity

In partial or complete dislocations, a noticeable bump or elevation appears at the end of the clavicle compared to the uninjured side.

5️⃣ Clicking or Popping Sensation

Some patients feel clicking or popping during shoulder movement, especially when lifting the arm.

6️⃣ Weakness or Loss of Strength

Difficulty lifting or pushing objects.
Severe injuries may limit shoulder use for a period of time.

7️⃣ Shoulder Stiffness

Joint stiffness and reduced range of motion if the injury is not treated or gently mobilized.

Recovery Period

Non-Surgical Treatment

Typically takes 2–6 weeks, depending on injury severity.

After Surgery

Arm sling for 3–6 weeks.
Gentle range-of-motion exercises start after about 2 weeks.
Progressive strengthening exercises begin after 6–12 weeks.

Return to Sports

Most patients can return to sports within 3–6 months, depending on injury type and severity.
Adhering to a gradual physical therapy program is essential to prevent re-injury.

Types of Acromioclavicular Joint Injuries

AC joint injuries are classified into six grades based on the extent of ligament damage:

1️⃣ Grade I – Mild Sprain

Description: Minor ligament stretching.
Symptoms: Mild pain with movement or pressure, no visible deformity.
Treatment: Rest, ice, pain relievers, and physical therapy.

2️⃣ Grade II – Partial Dislocation

Description: Partial ligament tear with relative joint stability.
Symptoms: Moderate pain, swelling, slight elevation of the clavicle.
Treatment: Shoulder brace and strengthening exercises after pain subsides.

3️⃣ Grade III – Complete Dislocation

Description: Complete ligament rupture causing joint instability.
Symptoms: Severe pain, noticeable swelling, visible clavicle elevation.
Treatment: Conservative treatment or surgery depending on symptoms and activity level.

4️⃣ Grade IV

Description: Complete dislocation with backward or upward displacement of the clavicle.
Symptoms: Severe pain, marked deformity, loss of strength.
Treatment: Surgical intervention is usually required.

5️⃣ Grade V

Description: Severe complete dislocation with extensive ligament damage.
Symptoms: Extreme pain, major deformity, inability to lift the arm.
Treatment: Urgent surgical repair.

6️⃣ Grade VI – Very Rare

Description: Complete dislocation with the clavicle displaced beneath or in front of the shoulder structures.
Symptoms: Severe pain, significant deformity, major functional impairment.
Treatment: Emergency surgical correction.

Diagnosis of Acromioclavicular Joint Injuries

Accurate diagnosis is essential to determine injury severity and appropriate treatment:

1️⃣ Medical History

Onset and nature of pain.
Pain severity with movement or pressure.
Previous shoulder injuries or surgeries.
Activity level and sports participation.
Presence of chronic conditions such as diabetes or heart disease.

2️⃣ Physical Examination

Tenderness over the AC joint.
Swelling or bruising.
Visible deformity or clavicle elevation.
Special tests to assess joint stability and ligament integrity.

3️⃣ Imaging Studies

X-rays: Identify dislocation, fractures, and clavicle displacement.
MRI: Detect ligament tears and soft tissue damage, especially in complex or chronic cases.
Ultrasound: Useful for detecting ligament or tendon inflammation and tears.

4️⃣ Additional Tests

Blood tests if infection or inflammatory disease is suspected.
Muscle strength assessment to evaluate functional impact.

Risks and Complications of AC Joint Injuries

If not properly treated, complications may include:

1️⃣ Chronic shoulder pain.
2️⃣ Loss of strength or restricted shoulder motion.
3️⃣ Permanent joint deformity.
4️⃣ Joint instability and repeated dislocations.
5️⃣ Surgical complications such as infection, nerve or blood vessel injury, or hardware failure.
6️⃣ Delayed return to sports or daily activities.

Surgical Treatment for AC Joint Injuries

Surgery is often required for severe injuries (Grades IV–VI) or when conservative treatment fails.

Surgical Goals

Restore normal joint alignment.
Stabilize or reconstruct damaged ligaments.
Reduce pain and restore strength and motion.
Prevent long-term deformity or instability.

1️⃣ AC Joint Reconstruction

Description: Repair or replacement of damaged ligaments using grafts or synthetic materials.
Recovery: Sling for 3–6 weeks, gentle exercises early, strengthening after 6–12 weeks.

2️⃣ Clavicle Fixation

Description: Stabilization using screws or wires.
Recovery: Sling for 3–6 weeks, light motion after 2 weeks, strengthening after 6–8 weeks.

3️⃣ Distal Clavicle Resection

Description: Removal of a small portion of the clavicle to relieve pain, often for chronic injuries.
Recovery: Normal movement after 2 weeks, strengthening after 4–6 weeks.

4️⃣ Arthroscopic AC Joint Surgery

Description: Minimally invasive surgery using a camera and small instruments.
Benefits: Less pain, faster recovery, early mobilization.

Preoperative Tips for AC Joint Surgery

1️⃣ Discuss the procedure, expectations, and recovery timeline with your surgeon.
2️⃣ Complete all required imaging and lab tests.
3️⃣ Stop certain medications or supplements if advised.
4️⃣ Maintain good physical and mental preparation.
5️⃣ Plan home support during the recovery period.

Postoperative Care Tips

1️⃣ Use a shoulder or arm sling as directed (usually 3–6 weeks).
2️⃣ Manage pain and swelling with prescribed medications and ice packs.
3️⃣ Follow a structured physical therapy program.
4️⃣ Avoid heavy lifting or sudden shoulder movements.
5️⃣ Attend regular follow-up appointments.
6️⃣ Maintain a healthy diet rich in calcium and vitamin D.