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Description[edit | edit source]

The triquetrum is one of eight carpal bones that forms part of the wrist joint. It is a pyramidal shaped bone that can be found in the medial side of the wrist.[1] The name triquetrum is derived from the Latin word triquetrus which means "three-cornered". Sometimes it is also called triquetral bone, triangular bone or cuneiform bone. 

Structure[edit | edit source]

The triquetrum has a triangular and pyramidal shape. It is situated in the proximal row of carpal bones on the medial side of the wrist. It has multiple articulation surfaces.[2]

Function[edit | edit source]

The triquetrum is one of the carpal bones that form the carpal arch, wherein the carpal tunnel is situated. It also serves as an attachment for multiple ligaments such as the ulnar collateral ligament.

Articulations[edit | edit source]

The triquetrum articulates with the lunate laterally, the pisiform anteriorly and the hamate distally. It also articulates with the triangular articular disk of the distal radioulnar joint.

See Also[edit | edit source]

References[edit | edit source]

  1. Moore KL, Dalley AF. Clinically Oriented Anatomy. Fifth edition. Philadelphia: Lippincot Williams & Wilkins; 2006
  2. Gray H. Anatomy of the Human Body. Twentieth edition. Philadelphia: Lea & Febiger; 1918 Available from: [Accessed 30 April 2019]