The most probable cause for a “slipped”  disk, (also called internal derangement, subluxated meniscus, dislocated or displaced disk) of the TMJ is macrotrauma to the joint by impact or hyperextension / hyperflexion injuries.  These injuries may occur as a result of joint contusion, fractures, whiplash trauma or iatrogenic trauma.  After these injuries take place, symptoms including pain, clicking / popping noises, jaw dysfunction, etc., may be immediate or delayed.