bites

Human / Tooth Knuckle Injuries

Mechanism

Clenched knuckle

- tooth often penetrates capsule of MCPJ (60%)

- can injure the bone (58%)

- usually 3 / 4 th MCPJ

Associated Injury

Boxer's fracture

- 4th / 5th metacarpal head

Extensor tendon Laceration

Pathology