During fixation of Bennett's fracture, which muscle hinders it :
Following are the deforming forces in Bennett's fracture :

At the distal fragment, it is the adductor pollicis.
At the proximal fragment, it is the abductor pollicis longus.
Extensor pollicis brevis
Flexor pollicis brevis
Flexor pollicis longus
Abductor pollicis longus
Abductor pollicis longus