Classification

The most frequent injuries are fracture through the base of middle phalanx and fracture through the dorsum of the distal phalanx. Fracture through the base of the middle phalanx may be T-Y shaped, or it may be chip fracture through the volar aspect. This latter variety is associated with dorsal subluxation or dislocation of Proximal interphalangeal joint.

Management

These injuries may be treated non operatively by finger nail traction or by fixation using K wires or small 1.5mm special screws. If neglected these injuries will result in stiff, deformed joint.

Mallet Finger

Fracture through dorsum of the distal phalanx is through the attachment of the extensor tendon. This in acute stage can be treated non surgically using a mallet finger splint. If neglected, it would result in inability to extend the distal interphalangeal joint, resulting in mallet finger deformity followed by swan neck deformity through proximal inter phalangeal joint.