Score: Herbert classification
Use: Scaphoid fractures
Type A
Stable acute fracture
A1: tubercle fracture
A2: incomplete waist crack fracture
Type B
Unstable acute fracture
B1: distal third oblique fracture
B2: complete displaced or mobile waist fracture
B3: proximal pole fracture
B4: transscaphoid carpal fracture-dislocation
Type C
Delayed union
Type D
Established nonunion
D1: fibrous nonunion (stable)
D2: displaced nonunion (unstable)Reference
Gutow AP. Percutaneous fixation of scaphoid fractures. J Am Acad Orthop Surg 2007; 15:474-485.