The Lab develops prototypes, projects and services that help make information meaningful and promote quality journalism, storytelling and content on the internet.
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.
Dislocations are described as dorsal, volar, or lateral depending on the direction of the middle phalanx to the proximal phalanx. A dorsal PIP dislocation is the most common type of finger dislocation. It usually involves injury to the volar plate and may include a volar plate avulsion fracture. A dorsal PIP dislocation often leads to obvious dorsal deformity of the middle phalanx and volar plate tenderness.