Fig. 7.

Herbert divided acute scaphoid fractures into acute stable (A) and unstable (B). Stable acute fractures included fractures of the tubercle and incomplete unicortical “crack” fractures. Only this type unites relatively fast and should be treated with a cast. (Reprinted, with permission covered by STM guidelines, from Green DO, ed. Operative Hand Surgery. 3rd ed. New York, NY: Churchill Livingstone; 1993.)