What does the acromioclavicular joint articulate with?
The acromioclavicular joint is a diarthrodial joint defined by the lateral clavicle articulating with the acromion process as it projects anteriorly off the scapula. The AC joint is a plane type synovial joint, which under normal physiological conditions allows only gliding movement.
What joint is the AC joint?
The acromioclavicular, or AC, joint is a joint in the shoulder where two bones meet. One of these bones is the collarbone, or clavicle. The second bone is actually part of the shoulder blade (scapula), which is the big bone behind the shoulder that also forms part of the shoulder joint.
Does AC joint separation need surgery?
Do all AC separations require surgery? No. In fact the vast majority of AC separations do very well with conservative treatment of the symptoms. Most AC injuries are grade I, II, or III and these generally do not require surgery.
What type of joint is the SC joint?
synovial joint
The sternoclavicular (SC) joint is a saddle-shaped, synovial joint that serves as the primary skeletal connection between the axial skeleton and the upper limb.
What is AC joint arthrosis?
AC joint arthrosis, or osteoarthritis of the, acromioclavicular joint is most common in people who are middle aged. It develops when the cartilage in the AC joint begins to wear out. With this condition, there usually pain that limits the motion of the arm.
What attaches to the AC joint?
The AC Joint is formed by the junction of the lateral clavicle and the acromion process of the scapula and is a gliding, or plane style synovial joint. The AC Joint attaches the scapula to the clavicle and serves as the main articulation that suspends the upper extremity from the trunk.
Where is the AC ligament?
Acromioclavicular ligament – runs horizontally from the acromion to the lateral clavicle. It covers the joint capsule, reinforcing its superior aspect.
How long does AC joint separation take to heal?
How long does it take for a shoulder separation to heal? Depending on how severe the injury is, it may heal adequately in two to three weeks. In severe cases, the shoulder may not heal without surgery.
What are the 7 ligaments that support the SC joint?
Structure
- Anterior sternoclavicular ligament.
- Articular capsule.
- Articular disk.
- Costoclavicular ligament.
- Interclavicular ligament.
- Posterior sternoclavicular ligament.
Why is sternoclavicular joint a saddle?
Articular surfaces The clavicular and sternal joint surfaces are convex and concave, respectively. In the horizontal plane the articular surface of the clavicle is slightly concave while that of the sternum is convex, thus forming a sellar or saddle joint.
