Bennett fracture

mechanism: forced abduction of thumb
findings:
- intraarticular fracture/dislocation of the base of the 1st metacarpal at the ulnar aspect
- small fragment of metacarpal continues to articulate with the trapezium
- lateral retraction of metacarpal shaft by abductor pollicis longus
difficult to keep in anatomical alignment
complication: pseudoarthrosis
better prognosis than Rolando fracture

Yong H. Hahn, MD - 2 February 1995
Last updated: 1 October 2013