Extensor tendon injury

Extensor Tendon Injury Zones
Fingers		Thumb
I	Mallet Injury	TI	Mallet Injury
II	Central slip to DIP	TII	MCP to IP
III	PIP	TIII	MCP
IV	MCP to PIP	TIV	CMC to MCP
V	MCP	TV	Wrist and proximal
VI	CMC to MCP
VII	Wrist and proximal