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From Wikipedia, the free encyclopedia. A scaphoid fracture, a fracture of the scaphoid bone also known as the carpal navicular, is the most common type of carpal bone fracture. Scaphoid fractures usually cause pain at the base of the thumb accompanied by swelling in the same area.
There are two common fractures of the metacarpals. 1  Boxerâs fracture â A fracture of the 5th metacarpal neck. 2  It is usually caused by a clenched fist striking a hard object. 3  The distal part of the fracture is displaced posteriorly, producing shortening of the affected finger. Metacarpals â There are five metacarpals, each one related to a digit. 2  Phalanges (Most distal) â The bones of the fingers. 3  Each finger has three phalanges, except for the thumb, which has two.