AC joint arthrosis, also known as acromioclavicular joint arthritis, is a type of osteoarthritis that affects the acromioclavicular (AC) joint in the shoulder. This condition arises when the cartilage within the AC joint begins to deteriorate.
Understanding AC Joint Arthrosis
Here's a detailed breakdown:
- Definition: AC joint arthrosis is fundamentally osteoarthritis specific to the AC joint.
- Location: The AC joint is where the acromion (part of the shoulder blade) meets the clavicle (collarbone).
- Cause: The primary cause is the breakdown of cartilage in the joint.
- Prevalence: It is more common in middle-aged individuals.
How Does AC Joint Arthrosis Develop?
The process is straightforward:
- Cartilage Wear: The protective cartilage between the bones of the AC joint wears down over time.
- Bone-on-Bone Friction: With less cartilage, the bones begin to rub against each other, leading to inflammation and pain.
- Pain and Limited Motion: This process typically causes pain and restricts the normal range of motion in the arm.
Symptoms of AC Joint Arthrosis
Here are the primary issues people experience:
- Pain in the shoulder, particularly at the AC joint.
- Limited arm movement.
- Possible tenderness when touching the AC joint.
Key Takeaways
| Feature | Description |
|---|---|
| Name | AC joint arthrosis or Acromioclavicular joint arthritis |
| Type | Osteoarthritis |
| Location | Acromioclavicular joint |
| Primary Cause | Cartilage degeneration in the joint |
| Common In | Middle-aged individuals |
| Main Symptoms | Pain and restricted movement in the shoulder and arm |
