Anterior Versus Posterior Shoulder Dislocation

History is often related to seizure or electrical injury as opposed to blunt trauma.

Anterior versus posterior shoulder dislocation. This is a rare pathological condition of the shoulders in which the shoulder gets dislocated posteriorly. Arm is held adducted and internally rotated. The shoulder dislocation more accurately termed a glenohumeral joint dislocation involves separation of the humerus from the glenoid of the scapula at the glenohumeral joint. Anterior dislocation of the shoulder is quite common but posterior dislocation of the shoulder is pretty rare and usually occurs after a trauma or an epileptic shock.

A shoulder dislocation often occurs as a result of a fall onto an outstretched arm or onto the shoulder. 2 to 5 of all unstable shoulders. Typically the humeral head is forced posteriorly in internal rotation while the arm is abducted 1 3. For specific dislocation types please refer to the following articles.

This study outlines clear distinctions between anterior and posterior shoulder instability in terms of presentation and clinical findings. Acute posterior shoulder dislocations are less common than anterior dislocations but more commonly missed 50 of traumatic posterior dislocations seen in the emergency department are undiagnosed. Anteriorly most common posteriorly or inferiorly. Posterior shoulder dislocation.

Patients with anterior instability present primarily with an identifiable mechanism of injury and complaints of instability whereas most patients with classic posterior instability have no identifiable mechanism of injury and their primary symptom is pain. This article contains a general discussion on shoulder dislocation. Typical symptoms include pain and. Because the head of the humerus is substantially larger than the glenoid fossa shoulder dislocation is the most common type of joint dislocation the head of the humerus can dislocate completely or partially subluxation in three directions.

Posterior shoulder dislocations account for only 2 4 of all shoulder dislocations the vast majority are anterior 1 3. Anterior vs posterior shoulder dislocations. Posterior location of the humeral head can be best visualized on the axillary lateral or scapular y view. 2 they are classified as anterior posterior inferior and superior with most being anterior.

The delayed diagnosis of posterior shoulder dislocation causes difficulties in treatment. When the physician arrives he explains that susan has sustained an anterior shoulder dislocation meaning the upper part of the humerus that fits into. Posterior dislocation of shoulder. The recurrence rate following acute anterior shoulder dislocations is high particularly in young active individuals.

Risk factors bony abnormality. In adults convulsive disorders are the most common cause. Anterior shoulder dislocation 95 of shoulder dislocations.