Shoulder Dislocation

Question 1

What is the pathology of shoulder dislocation?

Answer 1

Shoulder stability: ligaments, labrum, rotator cuff, scapular musculature
Occurs Post (<5%) and ANT
19.6% recurrence rate in first year
\+recurrence in males
\+recurrence 10-19 (49.2%)

Question 2

What causes Anterior Shoulder Dislocation?

Answer 2

Often due to abduction and ext rotation position (apprehension position
Humerus head displaces antero-inferiorly
Can result in Hills-Sachs lesion or Bankart lesion
Concurrent RCinjuries can happen
Vascular/neural structures at risk

Question 3

What causes posterior shoulder dislocation?

Answer 3

Blow to front of the shoulder
Can occur during seizures
Easily overlooked on AP X-ray
Concurrent injuries to RC (subscap) and post labrum