Results from a crush injury or blunt trauma
The perinychium includes the nail, the<unk> , and the surrounding tissue.
The paronychia is the lateral nail folds
The hyponychium is the palmar surface skin distal to the nail.
The lunula is that white semi-moon shaped proximal portion of the nail.
The sterile matrix is deep to the nail, adheres to it and is distal to the lunule.
The germinal portion is proximal to the matrix and is responsible for nail growth.
Nailbed laceration
Distal interphalangeal dislocation 
Lip laceration
Distal phalanx 
Tongue laceration
Finger amputation
Ear laceration
Fingertip avulsion