Final answer:
A complete displacement or separation of the articular surfaces of a joint is known as a dislocation, which requires medical intervention to correct.
Step-by-step explanation:
A complete displacement or separation of the articular surfaces of the joint is known as a dislocation. This condition involves a joint where the ends of the bones are no longer in proper contact, such as when the humeral head is displaced from the shoulder socket. Unlike subluxation, a partial dislocation, a dislocation is a complete separation and often requires medical attention to reduce and stabilize the joint. Repetitive strain injuries and fractures do not entail the displacement of joint surfaces but instead involve damage to muscles, tendons, ligaments, or broken bones, respectively.