Image Based Question-66504

The fracture shown in the picture below is a fracture of the ?

A. Base of the first metacarpal bone which extends into the carpometacarpal (CMC) joint.

B. Apex of the first metacarpal bone which extends into the carpometacarpal (CMC) joint.

C. Base of the second metacarpal bone which extends into the carpometacarpal (CMC) joint.

D. Base of the third metacarpal bone which extends into the carpometacarpal (CMC) joint.

Correct Answer » A Explanation

The fracture shown in the picture above represents Benett’s fracture.

Bennett fracture is a fracture of the base of the first metacarpal bone which extends into the carpometacarpal (CMC) joint. This intra-articular fracture is the most common type of fracture of the thumb, and is nearly always accompanied by some degree of subluxation or frank dislocation of the carpometacarpal joint.