Luxation of the Acromioclavicular Articulation

Luxation of the acromioclavicular articulation can be seen in the association with a fracture of an outer part of a clavicle, and it mostly leads to progress of secondary osteoarthritis of the acromioclavicular articulation, and to osteolysis. The most frequent cause of luxation of this articulation is an injury of the acromioclavicular articulation whose gravity depends on the damage level of the articular capsule and supporting ligaments.

Rates of dislocation of the acromioclavicular articulation

1.  Rate of dislocation of the acromioclavicular articulation

Minimal damage of the articular capsule, without damage of the supporting ligaments.

2. Rate of dislocation of the acromioclavicular articulation

It is represented by subluxation of the joint with a shifting of the acromion distally towards the clavicle. Subluxation is connected with a damage of the acromioclavicular ligament. Sometimes there is also a parcial rupture of the coracoclavicular ligament.

3. Rate of dislocation of the acromioclavicular articulation 

It is represented by complete luxation of the joint with a rupture of the coracoclavicular ligament.

 

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picture of a complete acromioclavicular luxation, the third rate

 

 

Symptoms at the Dislocation of the Acromioclavicular Articulation

At the dislocation of the acromioclavicular articulation the patient subjectively feels pains on the top of the shoulder in the area of the acromioclavicular articulation, which is sensitive to a palpation, and it is swollen. At complete luxations we can see step deformity. A restriction of the shoulder motility is also there.

Casuistry of luxation of the acromioclavicular articulation