Final answer:
A dislocation occurs when two parts of a structure are completely separated from each other. It requires medical attention to reduce the joint back into place and prevent complications.
Step-by-step explanation:
When two parts of a structure are completely separated from each other, it is known as a dislocation. A dislocation occurs when the bones in a joint are forced out of their normal position. This can cause severe pain, swelling, and loss of movement in the affected area. It is important to seek medical attention if a dislocation is suspected, as proper treatment is necessary to reduce the joint back into place and prevent further complications.