ABSTRACT
The proximal row comprises the scaphoid, lunate, triquetrum and pisiform; the distal row the trapezium, trapezoid, capitate and hamate. The pisiform is considered a sesamoid bone and articulates with the volar surface of the triquetrum. Acute primary repair of damaged dorsal and palmar ligaments should be accompanied by percutaneous internal fixation, and long-term ulnar translation is common even following accurate reduction and fixation. Type 1 injuries may be amenable to dorsal radiotriquetral reefing; alternatively four-corner fusion or radial scaphoid-trapezium-trapezoid fusion may be indicated. Numerous classifications have been described, including the following: Although simple, this classification is of value in planning management. The carpus is formed of two rows of four bones. The proximal row comprises the scaphoid, lunate, triquetrum and pisiform; the distal row the trapezium, trapezoid, capitate and hamate. The carpus is held together by intrinsic and extrinsic ligaments, which are connected via interdigitating fibres.
