The volar plate of the little finger MCP joint resists little finger MCP hyperextension, providing the palmar floor and check-rein restraint of the ulnar-most MCP joint.
Resists little MCP hyperextension, maintains MCP joint palmar stability, and is the structure displaced in little finger MCP dislocation — the most common MCP dislocation after the index finger.
Little finger MCP dislocations are the second most common MCP dislocation, with similar management to index MCP dislocations — simple dislocations are reduced closed, complex dislocations with volar plate entrapment require open reduction.
Dorsal MCP dislocation of the little finger with volar plate injury, managed by reduction and MCP extension splinting for 3-4 weeks.
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