Distal phalanx fracture: DIP joint in full extension Mallet finger: DIP joint in full extension Jersey finger (flexor digitorum profundus avulsion); DIP and PIP in slight flexion (eg, 15 to 30 °) MCP dislocation: MCP joint in about 50 ° flexion Step-by-Step Description of Procedure Choose (or fabricate) a splint of the appropriate length.