Ac Joint Cc Joint

The rockwood classification 1998 is the most common classification system in use for acromioclavicular joint injuries 3. A finding of ac joint cc should heighten suspicion of pseudogout or secondary osteoarthritis in appropriate clinical settings and in a young patient should alert the clinician to the possibility of an associated metabolic condition. The coracoclavicular ligament serves to connect the clavicle with the coracoid process of the scapula.

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Ac Joint Injury Classification

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Ac joint cc joint. The ac joint is stabilized by a joint capsule and ligaments. Partial but not complete disruption of cc ligament. The ac ligament controls the ap translation horizontal stability. Millett demonstrates arthroscopic ac joint reconstruction using knotless corococlavicular fixation and soft tissue anatomic coroclavicular ligament reconstruction.

It does not properly belong to the acromioclavicular ac joint articulation but is usually described with it since it forms a most efficient means of retaining the clavicle in contact with the acromion it consists of two fasciculi the trapezoid ligament in front and the conoid ligament. The cc ligament controls the vertical stability. Treatment is immobilzation or surgical reconstruction depending on the degree of separation and ligament injury. This well known 6 type system is a modification of the earlier 3 class classification system described by allman 1967 2 and tossy 1963.

Children and adolescents have a slightly wider joint space. A acromioclavicular joint injury otherwise known as a shoulder separation is a traumatic injury to the acromioclavicular ac joint with disruption of the acromioclavicular ligaments and or coracoclavicular cc ligaments. Only seen on stress views of injured and uninjured shoulders widening of ac joint. By age 60 width is often less than 1mm.

Ac joint normal width of ac joint in adults is 1 3mm. Cc joint normal distance is 11 13mm. The ac joint attaches the scapula to the clavicle and serves as the main articulation that suspends the upper extremity from the trunk 160. The acromioclavicular joint or ac joint is one of four joints that comprises the shoulder complex.

Almost invariably traumatic in etiology they range in severity from a mild sprain to complete disruption. 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. Acromioclavicular joint injuries are characterized by damage to the acromioclavicular joint and surrounding structures. It takes into account not only the acromioclavicular joint itself but also the coracoclavicular ligament the deltoid and trapezius.

The prevalence of ac joint cc increases with age and is associated with knee cc. Ac joint is stable. Partial or complete rupture of ac ligament. Comparison to opposite cc joint space is more important increase in cc distance of 25 50 indicates complete cc ligament disruption.