Which classification involves eight gradings for distal radial fractures based on involvement of the radiocarpal joint and distal radioulnar joint?

Frykman

Frykman classification for classification of distal radial fractures: I: distal radius II: I + distal ulna III: distal radius with intra-articular involvement of radiocarpal joint IV: III + distal ulna V: distal radial fracture with intra-articular involvement of the distal radioulnar joint VI: V + distal ulnar fracture VII: III + V VIII: VII + distal ulna