Ac Joint Injury Classification

Figure 5 2 acromioclavicular ac joint stability is maintained by the ac ligament coracoacromial ligament and the two coracoclavicular ligaments.

Ac joint injury classification. 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. Complete ac joint dislocation. The ac acromioclavicular joint is where the uppermost part of your shoulder blade a structure called the acromion meets your collarbone. 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.

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. Grant s atlas of anatomy. The rockwood classification 1998 is the most common classification system in use for acromioclavicular joint injuries 3.

This forces the acromion process downward beneath the clavicle. The acromioclavicular and coracoclavicular ligaments are usually damaged in the most common injuries to the ac joint. Evaluation and treatment of acromioclavicular joint injuries. An ac joint injury often occurs as a result of a direct blow to the tip of the shoulder from for example an awkward fall or impact with another player.

Correlation of ultrasonographic findings to tossy s and rockwood s classification of acromioclavicular joint injuries. This well known 6 type system is a modification of the earlier 3 class classification system described by allman 1967 2 and tossy 1963. Other described systems include the tossy and the allman classification systems. Am j sports med.

When ligaments connecting the acromion and collarbone g. Reprinted by permission classification of acromioclavicular joint injuries. Treatment is immobilzation or surgical reconstruction depending on the degree of separation and ligament injury. It takes into account not only the acromioclavicular joint itself but also the coracoclavicular ligament the deltoid and trapezius.

Sprain of ac joint capsule and ac ligament no deformity xrays normal. Quillen dm wuchner m hatch rl. Heers g hedtmann a. Imaging can be used to classify acromioclavicular injuries with the rockwood system most commonly used to classify injuries into six types.

Allman classification allman f l jbjs am 49 774 784 1967. Ultrasound med biol.