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Why does the anterior side of the shoulder joint capsule tear more commonly than any other side during shoulder dislocations?

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Dr. Frank Holmes
Sports Medicine

In brief: Instability forces

Shoulder stability is provided by the surrounding muscles, the glenohumeral ligaments/capsule and the labrum. The shoulder is most unstable during a trauma, when the shoulder is forced anteriorly (to the front) and inferiorly (below the shoulder).
This puts significant force on the anterior capsule often resulting in tearing/stretching. An abducted & externally rotated shoulder is most vulnerable

In brief: Instability forces

Shoulder stability is provided by the surrounding muscles, the glenohumeral ligaments/capsule and the labrum. The shoulder is most unstable during a trauma, when the shoulder is forced anteriorly (to the front) and inferiorly (below the shoulder).
This puts significant force on the anterior capsule often resulting in tearing/stretching. An abducted & externally rotated shoulder is most vulnerable
Dr. Frank Holmes
Dr. Frank Holmes
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