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MCP JOINT. The metacarpophalangeal (MCP) joint most commonly dislocated is that of the thumb. A simple dislocation involves no soft tissue obstruction, and reduction should be attempted. A complex dislocation involves intervening soft tissue (i.e., ligaments, musculature, or fascia) and requires surgical reduction.CP JOINT. The metacarpophalangeal (MCP) joint most commonly dislocated is that of the thumb. A simple dislocation involves no soft tissue obstruction, and reduction should be attempted. A complex dislocation involves intervening soft tissue (i.e., ligaments, musculature, or fascia) and requires surgical reduction.
What is a mandibular dislocation? A mandibular dislocation is the separation of your mandible (lower jaw) from your temporomandibular joint (TMJ). When this happens, your lower jaw does not go back in place on its own. What causes a mandibular dislocation? Opening your mouth too wide: This may happen when you laugh, yawn, sneeze, take large bites, or vomit. Some open mouth or dental procedures may weaken the muscles around your TMJ and lead to dislocation. Tooth problems: Teeth that are missing, worn, or not lined up correctly can prevent your jaw from working correctly.