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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.
A dislocation is a separation of two bones where they meet at a joint. Joints are areas where two bones come together. A dislocated joint is a joint where the bones are no longer in their normal positions. It may be hard to tell a dislocated joint from a broken bone. Both are emergencies.