Shoulder Separation (AC Joint Injury)
Treatment by Dr. Senthilvelan – Shoulder, Elbow & Wrist Specialist
A shoulder separation is often confused with a shoulder dislocation. However, it does not involve the main ball-and-socket joint. Instead, it affects the acromioclavicular (AC) joint — the joint where the collarbone (clavicle) meets the acromion of the shoulder blade.
This injury is common in contact sports, falls, and road traffic accidents.
Understanding the AC Joint
The AC joint is stabilized by two main ligament groups:
- AC ligaments – surround the joint itself
- Coracoclavicular (CC) ligaments – connect the clavicle to the shoulder blade underneath
These ligaments keep the collarbone aligned with the shoulder blade during arm movement.
What Causes a Shoulder Separation?
The most common cause is:
- A direct fall onto the shoulder
- Contact sports injury (football, rugby, hockey, cricket)
- Bicycle or motorcycle accidents
When the impact is strong enough, the ligaments tear, allowing the collarbone to shift out of position.
If the CC ligaments are torn, the weight of the arm pulls the shoulder blade downward, creating a visible bump on top of the shoulder.
Grades of Shoulder Separation
Grade I (Mild)
- AC ligament sprain
- No visible deformity
- Normal X-rays
Grade II (Moderate)
- AC ligament torn
- Partial injury to CC ligament
- Small bump visible
Grade III (Severe)
- Complete tear of AC and CC ligaments
- Noticeable bump on shoulder
- Joint clearly displaced
(Higher grades IV–VI are rare and involve more severe displacement.)
Symptoms of Shoulder Separation
Patients may experience:
- Pain on top of the shoulder
- Swelling and tenderness over AC joint
- Visible bump (in moderate/severe cases)
- Pain while lifting the arm
- Reduced shoulder strength
In mild injuries, the deformity may not be obvious.
Diagnosis
At Dr. Senthilvelan’s clinic, evaluation includes:
Clinical Examination
- Tenderness directly over AC joint
- Assessment of deformity
- Range of motion testing
Imaging
- X-rays to confirm alignment
- Stress X-rays (holding a weight) if needed
The diagnosis is usually straightforward when deformity is present.
Treatment of Shoulder Separation
Non-Surgical Treatment (Preferred in Most Cases)
The majority of Grade I, II, and III injuries recover well without surgery.
Treatment includes:
- Sling support (short period)
- Ice therapy
- Anti-inflammatory medications
- Gradual physiotherapy
- Range of motion exercises
- Strengthening
- Scapular stabilization
Even professional athletes often return to full activity with conservative treatment — even if a bump remains.
Recent research shows nonsurgical treatment often provides outcomes equal to or better than surgery for many AC joint injuries.
When Is Surgery Needed?
Surgery may be considered if:
- Persistent pain despite conservative care
- Severe deformity
- Functional limitation in high-demand athletes
Arthroscopic Surgery
- Trimming the end of the clavicle (distal clavicle excision)
- Ligament reconstruction
- Plate fixation (temporary, removed after healing)
Procedures may be done arthroscopically or via a small open incision.
Rehabilitation
Whether treated surgically or non-surgically, rehabilitation is essential.
Recovery Phases:
- Pain control and sling support
- Gradual restoration of motion
- Progressive strengthening
- Return to sports (usually 6–12 weeks for mild cases)
Full recovery depends on severity and treatment type.
Key Points for Patients
✔ A shoulder separation is not a shoulder dislocation
✔ Most cases recover well without surgery
✔ A visible bump does not always require surgery
✔ Early rehabilitation improves outcomes
When to Consult Dr. Senthilvelan
Seek medical attention if you have:
- Shoulder pain after a fall
- Visible deformity on top of the shoulder
- Difficulty lifting your arm
- Persistent pain despite rest
Early evaluation ensures proper healing and prevents chronic discomfort.
