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Acromioclavicular joint
Last reviewed: 23.04.2024
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The acromioclavicular joint (art asromio-clavicularis) is flat in shape, formed by the acromial end of the clavicle and the articular surface of the acromion. In 30% of cases, the joint has an articular disc (discus articularis). The capsule is attached at the edges of the articular surfaces. From above it is supported by an acromioclavicular ligament (lig. Acromio-claviculare). Medially from the joint, down from the clavicle, there is a powerful beak-clavicular ligament (lig. Coraco-claviculare), consisting of two parts. The first part, lateral, is attached to the trapezoidal line of the clavicle and is called the trapezoidal ligament (lig. Trapezoideum). The second part of the acromioclavicular ligament, located medial to the trapezoidal ligament, is attached to the conical tubercle - it is a conical ligament (lig. Conoideum).
In the acromioclavicular joint, movements with respect to the three axes are possible. The amplitude of these movements is insignificant, since the ligaments, especially the beak-clavicular, severely limit mobility in this joint.
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