Introduction Die-punch fragment is a depressed type of intra-articular fracture that formed when a part of articular surface cartilage and subchondral bone embed into cancellous bone due to vertical pressure.1 It is more common in distal radius fractures2, 3 and ankle fractures.1, 4 According to the Lauge–Hansen classification,5 posterior ankle fractures are usually caused by talus torsion and impact.6 However, with profound study, the mechanism of ankle fracture is actually more complex, and...