How do you measure coracoclavicular distance?

Measurement. The coracoclavicular distance is assessed on frontal radiography of the shoulder or clavicle or the coronal projection of a CT or MRI as the distance between the superior cortex of the coracoid process and the undersurface of the clavicle where the coracoclavicular ligaments insert.

What type of joint is acromioclavicular?

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 causes a separated shoulder?

What causes shoulder separation? Different types of shoulder injuries can lead to shoulder separation. Often, the injury happens when you fall directly on the top of your shoulder, when your arm is close to your body. A direct blow to your shoulder, or falling onto an outstretched hand, can also cause the injury.

What type of joint is the coracoclavicular joint?

synovial articulation
The coracoclavicular joint represents a true synovial articulation between the conoid tubercle of the clavicle and the superior surface of coracoid process of the scapula. This accessory articulation may be found either unilaterally or bilaterally.

How many degrees of freedom does the acromioclavicular joint have?

The AC joint is a plane synovial joint comprised of the acromial process of the scapula and the lateral end of the clavicle. A fibrous capsule surrounds the joint and there may be a fibrocartilaginous intra-articular disc. The joint has 3 degrees of freedom with 5-8 degrees rotation.

What is a Grade 5 shoulder separation?

Grade 5—Involves tearing of the joint covering (capsule) and ligaments connecting the shoulder blade (scapula) and collar bone (clavicle), and the end of the collar bone (clavicle) tears through the muscle covering (fascia) above it. Results in a large, permanent bump over the top of the shoulder at the AC joint.

Is shoulder separation worse than dislocation?

“A shoulder separation will occur at top of the shoulder, sometimes causing a bump in the affected area,” says Dr. Rajesh B. Makim, shoulder specialist at Orthopedic Associates of Port Huron. “A shoulder dislocation will occur when the shoulder joint comes apart, a much more serious and painful injury.”