Final answer:
The most common type of elbow dislocation is a posterior elbow dislocation.
Step-by-step explanation:
Dislocation of the elbow joint can occur in different ways, but the most common type is called a posterior elbow dislocation. This occurs when the ulna (forearm bone) dislocates from its normal position and moves backward in relation to the humerus (upper arm bone). It usually happens as a result of a fall on an outstretched hand with the elbow extended.