What is the treatment for a mallet finger injury?

A mallet finger injury occurs when the extensor tendon at the distal phalanx is ruptured or the bone associated with the tendon is fractured, leading to an inability to extend the finger at the distal joint. The appropriate treatment must effectively support the finger in a position that allows for healing of the tendon or bone.

Using a dorsal splint for full extension is the standard treatment for mallet finger because it keeps the finger straight, preventing movement at the distal interphalangeal joint. This immobilization is crucial for the healing process, as it allows the extensor tendon to properly heal in a position of optimal alignment. Keeping the finger in full extension also minimizes the risk of developing a fixed flexion deformity.

While buddy taping and casting can be helpful in certain scenarios for other types of injuries, they do not provide the necessary support for a mallet finger. Buddy taping can actually allow for some degree of movement at the injured joint, which is counterproductive for a successful recovery in mallet finger cases. Surgery is only often indicated for severe cases where there is a large fragment of bone displaced or avulsed, which is less common than the conservative management with splinting.