Extensor tendon injury zones chart form

Fingers

I. DIP: Mallet Injury

II. Central slip to DIP

III. PIP

IV. MCP to PIP

V. MCP

VI. CMC to MCP

VII. Wrist and proximal

Thumb

TI. IP: Mallet Injury

TII. MCP to IP

TIII.MCP

TIV. CMC to MCP

TV. Wrist and proximal