Final answer:
A mallet finger injury requires immobilization with a splint, with surgery needed for severe cases. Proper treatment is crucial for healing and preventing long-term complications.
Step-by-step explanation:
The football player's injury, characterized by the inability to flex the DIP joint and a small bony fragment at the solar surface of the proximal distal phalanx, suggests a mallet finger, also known as baseball finger. This injury occurs when the extensor tendon of the finger is damaged.
The most appropriate management would involve immobilization of the affected finger, typically with a splint that holds the DIP joint in extension. The splint must be worn continuously for several weeks to permit the tendon attachment to heal properly. In the case of a severe injury with a significant bony fragment or if the joint is misaligned, surgical intervention may be required. It is essential to consult a healthcare provider for an accurate diagnosis and treatment plan to prevent long-term complications such as permanent deformity or loss of function.