Displacement of Bennett Fractures is Driven Primarily by the Abductor Pollicis Longus (Apl) and the Adductor Pollicis Resulting in Flexion, Supination, and Proximal Migration.

(From CapoJT, GottschalkMB, StreubelPN, et al. Hand fractures and dislocations. In: TornettaP III, RicciWM, OstrumRF, et al., eds. Rockwood and Green’s Fractures in Adults. Vol 1. 9th ed. Philadelphia: Wolters Kluwer; 2020:1665–1770.)