Key Takeaways
- An AC joint injury, also called a shoulder separation, happens when the ligaments holding your collarbone to your shoulder blade are stretched or torn.
- Doctors classify these injuries into six grades based on how far the collarbone shifts out of place.
- Mild to moderate separations (Grades I through III) usually heal with rest, bracing, and a supervised recovery plan.
- Severe or chronic separations (Grades IV through VI) often require surgical reconstruction to restore stability.
- Dr. Srinath Kamineni is a fellowship-trained shoulder and elbow specialist serving Mount Carmel and Olney, IL, with advanced experience in AC joint reconstruction. Schedule a consultation to have your shoulder evaluated.
What Is the AC Joint and How Does It Get Injured?
The acromioclavicular (AC) joint is where your clavicle (collarbone) meets the acromion, the highest point of your shoulder blade. Small ligaments hold these two bones together and keep your shoulder stable during overhead motion and lifting.
Most AC joint injuries happen from a direct fall onto the point of the shoulder, such as during a bike crash, a slip on ice, or a collision in a contact sport. The impact stretches or tears the ligaments around the joint, allowing the collarbone to shift out of its normal position. This creates the visible bump and pain that people often describe as a 'separated shoulder.'
How Are AC Joint Injuries Graded?
Orthopedic surgeons use a six-grade classification system to describe the severity of an AC joint injury:
- Grade I: The AC ligament is sprained, but the joint stays in place.
- Grade II: The AC ligament tears and the coracoclavicular (CC) ligament is sprained, causing mild misalignment.
- Grade III: Both the AC and CC ligaments tear completely, and the collarbone sits noticeably above the shoulder blade.
- Grades IV through VI: These rarer, higher-energy injuries involve the collarbone shifting backward, far upward, or downward, often alongside additional soft tissue damage.
Your doctor typically confirms the grade with a physical exam and X-rays that compare both shoulders.
Non-Surgical Management for Mild to Moderate Separations
Most Grade I and Grade II injuries, and many Grade III injuries, respond well to non-surgical care. A typical recovery plan includes:
- A sling to support the arm and limit painful movement in the first days after injury.
- Ice and anti-inflammatory medication to reduce swelling.
- A structured hand therapy or physical therapy program to restore motion and strength once acute pain subsides.
Most patients regain full use of the shoulder without surgery, though a small bump where the collarbone sits slightly elevated can remain permanently. This bump is cosmetic and does not usually affect shoulder function.
When Surgery Becomes the Right Option
Surgical reconstruction is generally reserved for Grade IV, V, and VI injuries, and for select Grade III cases where pain, weakness, or instability persist despite a full course of non-surgical treatment. Dr. Kamineni also manages chronic AC joint separations in patients who were never treated surgically after the original injury and continue to have symptoms.
For these more complex cases, Dr. Kamineni performs an open reconstruction of the torn ligaments. This approach uses a strong suture-and-button device, or in some cases a tendon graft, to pull the collarbone back into its proper position and hold it there while the repair heals. You can review the specifics of this technique on the AC joint dislocation reconstruction page.
Non-Surgical Care vs. Surgical Reconstruction
| Factor | Non-Surgical Management | Surgical Reconstruction |
|---|---|---|
| Typical injury grade | Grade I, II, and most Grade III | Grade IV, V, VI, and select chronic Grade III |
| Main treatment | Sling, ice, hand therapy or physical therapy | Open ligament reconstruction with suture-button device or graft |
| Recovery timeline | Weeks to a few months | Sling for approximately six weeks, followed by several months of rehabilitation |
| Best for | Stable joints with manageable pain | Persistent instability, significant displacement, or high physical demands |
Get an Accurate Diagnosis for Your Shoulder Pain
A shoulder separation can range from a minor sprain to a complete ligament tear, and the right treatment depends entirely on an accurate diagnosis. Dr. Srinath Kamineni brings double fellowship training, including time at the Mayo Clinic, to the evaluation and treatment of AC joint injuries for patients throughout Mount Carmel and Olney, IL.
If you have shoulder pain, swelling, or a visible bump after a fall or collision, schedule an appointment with Dr. Kamineni to determine the grade of your injury and the most appropriate treatment path.
Frequently Asked Questions
How do I know if my AC joint injury needs surgery?
The need for surgery depends mainly on the grade of your injury and how much the collarbone has shifted out of place. Lower-grade injuries usually heal well without surgery, while higher-grade injuries or cases with ongoing pain and instability often benefit from reconstruction. An exam and X-rays with an orthopedic specialist are the best way to determine your specific grade and treatment path.
Will I always have a bump on my shoulder after an AC joint separation?
Many patients who are treated non-surgically keep a small, permanent bump where the collarbone sits slightly above the shoulder blade. This is usually a cosmetic change rather than a functional problem, and most people regain full strength and range of motion despite it.
What is the recovery time for AC joint reconstruction surgery?
Recovery from an open AC joint reconstruction typically involves wearing a sling for around six weeks, followed by a structured hand therapy program. A full return to normal activity, including sports, can take six months or longer depending on the individual and the physical demands of their daily life.
Is an AC joint injury the same as a dislocated shoulder?
No. An AC joint injury, or shoulder separation, affects the small joint where the collarbone meets the shoulder blade. A dislocated shoulder involves the main ball-and-socket joint of the shoulder coming out of place. The two conditions have different symptoms and different treatments, so an accurate exam is important to tell them apart.
Can I find an orthopedic surgeon near me for a shoulder separation in Southern Illinois?
Yes. Dr. Srinath Kamineni sees patients with AC joint injuries and other shoulder conditions at locations in both Mount Carmel and Olney, IL. You can find directions and office hours on the locations page or request an appointment online.
