Figure Legend: Bennett's and reverse Bennett's
fractures. These are fracture dislocations of the thumb and small
metacarpal bases, respectively. They are each inherently unstable
because of the resultant unopposed distracting forces of remaining muscle
tendon attachments on the larger fracture fragment. The abductor
pollicis longus displaces the thumb Bennett's fracture, and the extensor
carpi ulnaris displaces the small finger reverse Bennett's fracture.
Each of these requires at least temporary internal fixation to reliably