Mallet finger

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Usually due to direct blunt trauma causing forceful flexion of an extended finger tip, but may be due to a laceration. The force strecthes the tendon, causing rupture of the extensor tendon itself, or avulsion of its insertion into the distal phalanx. Regardless, the distal extensor mechanism is disrupted, leaving a resting flexion deformity.

Treatment is usually conservative by splinting the finger in extenstion.