Osteoarthritis of the Acromioclavicular Joint: A Patient’s Guide

Overview

Osteoarthritis of the acromioclavicular joint, also known as AC joint arthritis, is a common condition that affects the joint where the collarbone (clavicle) meets the shoulder blade (acromion). This joint is responsible for allowing the shoulder to move and rotate properly.

AC joint arthritis occurs when the cartilage that covers the bones in the joint wears away over time, leading to pain, stiffness, and reduced range of motion in the shoulder. This condition is more prevalent in older adults, athletes, and individuals who engage in repetitive overhead activities.

Causes

The exact cause of AC joint arthritis is not always clear, but it is often associated with normal wear and tear on the joint over time. Other factors that can contribute to the development of AC joint arthritis include:

• • Previous shoulder injuries

• • Repetitive overhead movements

• • Genetic predisposition

• • Obesity

• • Poor posture

Symptoms

The most common symptoms of AC joint arthritis include:

• • Shoulder pain, especially with overhead movements

• • Stiffness in the shoulder joint

• • Swelling around the AC joint

• • Weakness in the shoulder muscles

• • Popping or clicking noises in the shoulder

In some cases, the pain may radiate down the arm or up into the neck.

Diagnosis

Diagnosing AC joint arthritis typically involves a physical examination by a healthcare provider, along with imaging tests such as X-rays or MRI scans. During the physical examination, your healthcare provider may ask you to perform specific movements to assess your shoulder’s range of motion and pinpoint areas of pain or tenderness.

X-rays can help visualize any changes in the joint, such as bone spurs or narrowing of the joint space, while an MRI scan can provide more detailed information about the soft tissues surrounding the AC joint.

Treatment Options

Treatment for AC joint arthritis can vary depending on the severity of the symptoms. Some common treatment options include:

• • Physical therapy to improve shoulder strength and flexibility

• • Anti-inflammatory medications to reduce pain and swelling

• • Corticosteroid injections to help relieve pain and inflammation

• • Activity modification to avoid exacerbating symptoms

• • Surgical options, such as AC joint resection or arthroplasty, may be considered in severe cases

Living With Osteoarthritis of the Acromioclavicular Joint

Living with AC joint arthritis can be challenging, but there are steps you can take to manage your symptoms and improve your quality of life:

• • Stay active with low-impact exercises that don’t put too much strain on the shoulder joint

• • Maintain a healthy weight to reduce stress on the joints

• • Use proper body mechanics when lifting or reaching to avoid aggravating the shoulder

• • Apply ice or heat therapy to the affected area to help reduce pain and inflammation

• • Consider using assistive devices, such as a brace or sling, to support the shoulder during activities

When to Seek Help

If you experience severe pain, sudden swelling, or difficulty moving your shoulder, it is important to seek medical attention promptly. These may be signs of a more serious injury or condition that requires immediate treatment. Additionally, if your symptoms do not improve with conservative measures or if they worsen over time, consult with your healthcare provider for further evaluation and management options.