A 45-year-old male construction worker falls from a height of 2 meters onto his outstretched hand with the wrist in flexion. He presents with severe pain, swelling, and a deformity described as a 'spoon-like' or 'reverse dinner fork' appearance of the wrist. X-ray of the wrist shows a fracture of the distal radius with volar displacement and volar angulation of the distal fragment. The fracture line extends into the wrist joint. What is the most appropriate classification of this fracture?