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